Harley Backfiring On Deceleration

Usually right after starting cold and having the choke on or, less often, after riding for several hours. The MAF or Mass Air Flow sensor (if present) is the main sensor used by the ECM to determine Fuel Delivery. Harley-Davidson: 1. Okay guys, no one really came to my rescue on this one. Ride it around after warmed up (5 minutes) put it into a closed throttle decel from say 2nd or 3rd gear for a good distance from mid level to high RPM and as soon as you let off the throttle pull up a little on the choke lever to create a richer condition, bring it down to about a thousand RPM; if this stops the popping then you know what to do -- go richer on the bottom end. Harley davidson backfiring through exhaust. Here’s the first thing to check before delving deeper into your backfiring problems. Switching the engine off and starting it again sometimes helps. Backfiring tends to be due to extra air being injected into the exhaust ports via a secondary air injection system, designed to burn off excess fuel for emissions. Hey I have a 2006 zx10r with a single can two brothers exhaust. The fuel pump diaphragm can also leak fuel through vacuum tubing causing the motor to stall on deceleration. Decel pop is a fairly common issue when you start modifying the intake and exhaust on fuel injected motorcycles. On the SERT [screaming eagle race tuner] there is a table called "Decel Enleanment" where you can adjust how much the fuel is cut back when the throttle closes. If this doesn't stop the pop then richen up your mixture screw a little, if you can't tune it out with the mixture screw then may have to go up a jet size. The burnt fuel then enters the intake system, causing the air fuel mixture in the intake system to combust. This is what we are going to discuss. If you have an older vehicle with a distributor, then I would check to ensure that it hasn't jumped time. How to install an aftermarket air cleaner on your Harley Lemmy Shop the gear Gasbox Carburetor Support Bracket For Harley Sportster 1957-1985 $23. Improperly set idle mixture screws are often the reason for carburetor symptoms such as hesitation, rough idle, backfire, stalling, hard starting, engine surge, and. phone: 828-645-0017 Contact Us. The front mount is sagging causing the top curvature of the rubber mount to rub on the metal frame transferring vibrations. Harley-Davidson Sportster Motorcycles from 1986 to Present. If you have no baffles or torque cones installed popping on deceleration is normal and almost impossible to get rid of without running too rich. 05 trx450r backfire on deceleration I just got a 05 trx450r and it backfires on deceleration after a 1/4 -1/2 or more throttle usage. 96 S&S Adjustable Carburetor Support Bracket $19. You can enrich the idle mixture by removing the pilot screw cap and backing the screw out 1/2 to 3/4 turn from its factory setting. CycleTrader. The Harley Davidson Sportster does not have a fuse box. Question: Why is my VTX having Deceleration Popping?. As a guest you can view the forum and photo galleries, but you have to register before you can post or view attachments. S 1971 School Bus Yellow "Spaghetti" Harley-D Sprint 350 1972 Candy Yellow Honda CL100 K2. This should not last for more than a few minutes. During decel, you are going to get some unburned fuel mixture passing through the engine if you have any valve overlap at all. Backfiring on deceleration is air getting into the exhaust and igniting unburned fuel. In general, backfiring on deceleration (as opposed to acceleration) is generally caused by a lean condition in the pilot circuit. As some have said, running straight pipes on the newer motors can cause this because of the tight specs. I recommend the SE gaskets. Other Causes of Backfire During Acceleration and Deceleration: Bad ignition system wiring. 2016 Harley Davidson Softail Breakout FXSB Parts & Accessories at CycleGear. Backfire? I will get right to the point. I recently purhased a 2012 Camry, and hear a crackling noise from around the exhaust area as soon as I start the car and during idling. Parts for Harley CV carburetors. Time to pull and clean the pilot jet in your carb. This decel pop can range from a small firecracker to large bangs depending on the configuration. Dyno of Harley Davidson Sportster: Before & After - Duration: 2:15. Harley-Davidson Sportster Motorcycles from 1986 to Present. Close the petcock and run the. O2 in the exhaust is normal to an extent, in fact most manufacturers INJECT fresh O2 into the exhaust manifold to "cheat" emissions rating, making the engine appear to burn cleaner. Once the road test has been completed and the vehicle is placed on a lift for inspection, the technician can check for any signs of the exhaust leaking. That's the answer I was looking for. With short open pipes it's almost impossible not to have popping. Shop the best 1998 Harley-Davidson Touring Road King Classic EFI FLHRCI Parts & Accessories for your motorcycle at J&P Cycles. In Thumpers (single cylinder motocross bikes) slight popping is considered the tell-tail mark your pilot jet is correct. 204 East 15 th Street. The Deceleration Pop Problem Decel Pop is many times a nasty issue to deal with. I read other posts but its always nice to hear it fresh! Bike is running pretty good other than backfiring on decel. 50 traction lok N case, 14" 2015 Brembo 4 piston disc, QA1 4 wheel coil covers, Chromo tube susp arms, Triangulated rear arms, Convertible inner rockers & seat riser, 8 point roll bar. The engine runs normally otherwise. High flow air cleaners, agressive cams and very open, free flowing exhaust system all contribute to decel backfiring. If it's at Decel it's not really a backfire, it's most likely excess fuel being burned off inside the exhaust. I wanted a bigger bike, so I just bought a 2006 FXDL Lowrider with only 3,000 miles on it. Not now!! Within 10 minutes, I had the correct MAP installed that virtually eliminated the deceleration embarrassment! I’m going to plug it in and run the Autotune to fine-tune the ECU. The heat from the pipes then ignites the vapor and boom, backfire. Actually, deceleration popping (backfire) is caused by a lean condition. We take a minute to break it down for you and show you a simple way to fix it with a Dynojet Power Vision. You're quite right, as my experience has been exactly that when running an EMS and having the low load (decel) portions of the map running in the 16-17:1 AFR range, which resulted in decel pops/backfires (wasn't intentional, just wasn't really concerned with decel AFR and happened to notice that the lean AFR on decel resulted in those pops/backfires). The Tips are fabricated from steel which has be lustrously chromed to match the stock heat shields perfectly. And, as long as you're in there, you should clean the main jet, float valve, choke. The engine backfire on deceleration is also caused by the too lean air/fuel ratio - A lot of people think that the backfire/popping in the exhaust is caused by too rich mixture, but it's actually the other way round. All fuel injection systems turn off the fuel during deceleration when the throttle is fully closed, then turns the fuel back on down to idle once the engine reaches a predetermined r. A backfire is an explosion that occurs either in the intake or in the exhaust of the motorcycle. The car idles fine, runs fine under light to moderate acceleration but when you pound the pedal the enging cuts out and seemed to even backfire once. I recently purchased TBR's new countermeasure 2 racing exhaust (Oval Canister). If fuel and electrical is all good/correct it is often the case in these symptoms that motor cycle spark plugs that although looking good and firing outside of the engine are breaking down and will not fire under compression pressures on a power stroke but will fire unburned fuel on the. Motorcycle discussion forum. 7 pounds) and it is equiped with a V2, four-stroke motor. 30 Questions View all. Same for intake. If it is popping out the exhaust then either unburned fuel is getting into the hot exhaust pipes an igniting or the timing is too far retarded. Other Causes of Backfire During Acceleration and Deceleration: Bad ignition system wiring. Then, if it starts at all, it dies if you try to put any power to it. Golf Cart Backfires When Throttle Plate Doesn’t Close Correctly. Backfiring on the other hand can sound like a shotgun going off with a big boom. Mine has been doing it for a while, especially if I do not completely close the throttle during deceleration. I own a 1991 VFR. Hope this helps. Time to pull and clean the pilot jet in your carb. International. CycleTrader. 30 Questions View all. SYMPTOM SUMMARY The engine stalls when coming to a stop or on deceleration. Backfiring, is extremely rare these days with electronic ignitions and the high reliability of engines. I recently purchased TBR's new countermeasure 2 racing exhaust (Oval Canister). I'm sure this is a tired topic, but does anyone have advice about curing the backfiring on my 2000 R1100R. When I 1st start my bike ('99 FXR3 80" EVO) it idles fine. Deceleration Backfire. Not now!! Within 10 minutes, I had the correct MAP installed that virtually eliminated the deceleration embarrassment! I’m going to plug it in and run the Autotune to fine-tune the ECU. com is dedicated to the Honda CB750 SOHC and DOHC motorcycles and to their owners who love to ride, restore, and customize them. You're quite right, as my experience has been exactly that when running an EMS and having the low load (decel) portions of the map running in the 16-17:1 AFR range, which resulted in decel pops/backfires (wasn't intentional, just wasn't really concerned with decel AFR and happened to notice that the lean AFR on decel resulted in those pops/backfires). First, change the tires. I have a 1994 Harley Davidson, with 80K miles, that is backfiring under throttle. The engine must be at full operating temperature. You can now select from 3 different decel-pop reduction levels to help with this annoying and sometimes unsettling. Not uncommon, should happen when decelerating in gear, the explosions aren't as violent, and don't get as much gas burned, so left-overs happen. I would replace the spark plugs, and inspect the wires, cap and rotor (most newer vehicles don't have the cap and rotor button). When it doesn't, there is an interruption in the engine's operation. Carburetor/manifold leaks are much less common. I read other posts but its always nice to hear it fresh! Bike is running pretty good other than backfiring on decel. If it is popping out the exhaust then either unburned fuel is getting into the hot exhaust pipes an igniting or the timing is too far retarded. International. hello all, learning more and more about this bike as time goes on. If it is too lean on the pilot circuit it will backfire like a son of a gun on decel I have had personal experience with this exact issue several times with 4-strokes with pipes and filters, and on all counts a richer pilot along with main was the cure. The bike has had a backfire since I've had it. 16mm) and then put her back together. Maybe my linkage is overly tight, but it seems that just a little pressure on the pedal causes a little extra fuel and I get the effect. I had the jets done and now, unless the idle is set too high (doesn't backfire but gathers speed through high gears), the backfire occurs everytime during. fuel injected. It originally occurred randomly during deceleration. When it doesn't, there is an interruption in the engine's operation. Shop our complete selection of Cruiser Motorcycle parts and accessories including the Baron Custom Accessories Air-Injection Removal Kit - BA-2551-00. This is the main reason why modified Harley engines tend to backfire through the carburetor more frequently than stock engines. Hey I have a 2006 zx10r with a single can two brothers exhaust. Deceleration backfire harley · Video embedded · Nice capture about Amazing backfires of Harley-Davidson, huge acceleration, loud exhaust sound in fly-by. 0 out of 5 stars 3. Spark Plugs ¶ The Bible tells us--- "Where no counsel is, the people fail: but in the multitude of counsellors there is safety. We actually experienced more backfiring when we drilled our stock baffles. The Suzuki VS 1400 Intruder model is a Unspecified category bike manufactured by Suzuki. It runs smooth on acceleration but vibrates horribly on deceleration and pops and backfires. Here’s the first thing to check before delving deeper into your backfiring problems. MAF Sensor. Backfires - Popping on deceleration for a lean idle circuit or backfires in general. Harley Davidson Other Parts and Accessories. 16mm) and then put her back together. What does it do? What are the typical symptoms of a bad one? I have an 86 XR600R (dual carbs)and it starts and runs fine for the most partmy only minor complaint is a bit of backfiring on decel. As a matter of fact, there are quite a few threads on here pertaining to the backfire/baby farts on deceleration on the LX150, Fly 150 etc, but non had a conclusive answer. On a street bike, the rule of thumb is to adjust the fuel mixture screw out in ½ turn increments to add fuel. How to install an aftermarket air cleaner on your Harley Lemmy Shop the gear Gasbox Carburetor Support Bracket For Harley Sportster 1957-1985 $23. recently did a motor swap to a newer Jasper engine I had from my 1987 f-350. Easy step by step guide on how to repair an automotive engine that is surging, this information pertains to most vehicles and is listed in the order of popularity. Tips to Prevent Backfire. The backfiring during acceleration is a serious engine related (cam timing, bad valve seat seal, etc. The video below will show you how to check a fuel pump diaphragm. Mine has been doing it for a while, especially if I do not completely close the throttle during deceleration. Since it's only happening on the rear cylinder I'd check the manifold intake gasket for that cylinder and also make sure there's no air leak around the injector itself. You also need to give your EFI system time to adjust. I adjusted it down to about 1100. i cant get a hold of the guy who owned it before me so i cant ask him about the bike but he did say it had a big bore kit. The cheapest cure is usually the most time consuming. What does it do? What are the typical symptoms of a bad one? I have an 86 XR600R (dual carbs)and it starts and runs fine for the most partmy only minor complaint is a bit of backfiring on decel. This lasts only a few seconds before it shuts down completely. So to prevent you from failing Spark Plug reading here is a multitude of counsellors in picture form. This will also cause problems with the fuel efficiently getting through the engine. So, the popping you are hearing is not back-firing. com is dedicated to the Honda CB750 SOHC and DOHC motorcycles and to their owners who love to ride, restore, and customize them. If this is the case no adjustments made by the Power Commander, or any piggyback device, can help reduce this problem. (The pilot screw is located on the engine side of the carb, in front of the bowl, on the bottom. 05 trx450r backfire on deceleration I just got a 05 trx450r and it backfires on deceleration after a 1/4 -1/2 or more throttle usage. Instructions. I have a 2000 Honda VT1100 Sabre Shadow. And that needs to be tailored to the scooter being worked on. I used the Harley gaskets on mine when I went to the Muzzy exhaust - never a backfire or even a hint of it. 4/5spd Beretta build thread GEARHEAD dezign. , Tuesday, June 26. At times the bike would backfire when changing gears. Harley-Davidson Fuel Injection basics It is a sad day in Hogville. I let it warm up for a good 5-6 minutes (1 cigarette's worth of time) before I pull off. Exhaust backfire on deceleration - Holley Performance Products Forums. The engine must be at full operating temperature. But the bigger question is how does gas get there in the first place, and that’s a bit more complicated. Harley Davidson has introduced the Screamin’ Eagle Pro EFI Super Tuner, a plug in unit that connects to the USB port of your PC and allows 15 minutes of data recording, tracking of up to 26 variables and the software automatically connects to the Internet for updates and the latest calibrations. More like a loud slap than a burble. This is what we are going to discuss. Low compression means that the Harley cannot burn the fuel at the same rate that the air and fuel mixture is coming into the combustion chamber. Backfiring on decel indicates too lean in the pilot circuit. This should not last for more than a few minutes. And, as long as you're in there, you should clean the main jet, float valve, choke. Hey I have a 2006 zx10r with a single can two brothers exhaust. The Race Tuner software program comes on a CD-ROM along with a hardware "key" (adapter) that allows connecting a PC to the stock ECM. The last few days, my KMD 150 GY6 would start dying at intersections and give an every-now-and-then backfire. Other Causes of Backfire During Acceleration and Deceleration: Bad ignition system wiring. When i get on the throttle & let it go my bike pops & crackles a bit & i just love it fully completely. Any time the exhaust is “opened up” the condition of deceleration pops is MUCH more noticeable and problematic. All fuel injection systems turn off the fuel during deceleration when the throttle is fully closed, then turns the fuel back on down to idle once the engine reaches a predetermined r. If it's at Decel it's not really a backfire, it's most likely excess fuel being burned off inside the exhaust. What the Home Mechanic Needs to Know About O2 Sensors - An Article from the OBDII Technical Library. Show Full Signature. All chromed out with new black gloss paint. On a street bike, the rule of thumb is to adjust the fuel mixture screw out in ½ turn increments to add fuel. This website was created so ninjette owners (and potential ninjette owners) can show off their bikes, ask and answer questions about their bikes, and write up the adventures they're having with their bikes. So to find out what's wrong. This could be because they are, as some others have suggested, trying to “rev-match” their downshifts to their slowing speed and let the transmission. The FP3 has you covered. As a guest you can view the forum and photo galleries, but you have to register before you can post or view attachments. Welcome to the Roadstar Clinic. But the bigger question is how does gas get there in the first place, and that’s a bit more complicated. This is what we are going to discuss. Ways to reduce and possibly eliminate this popping are listed below and can vary between Harley-Davidson motorcycles and others. Hope this helps. Eldon, Missouri 65026. When the incorrect cylinder fires out of time when the exhaust valve is open, you will experience a backfire. This can be in eather the intake or the exhaust. Deceleration backfire is caused by fuel burning in the exhaust manifold or header. The Carburetor Shop LLC. Popping on deceleration is due to unburnt fuel being ignited in the exhaust. Decel pop is a fairly common issue when you start modifying the intake and exhaust on fuel injected motorcycles. Decel backfires are caused by both rich and lean conditions and depends on the engine build components. It has Vance and Hines Big Shots and a Screamin Eagle air filter. Always change your exhaust flange gaskets whenever removing or having loosened your head pipes. Okay guys, no one really came to my rescue on this one. Video embedded · This LED based backfire system for your RC car simulates theThere were absolutely no burrs or blemishes on the exhaust tips or backfire kit. Choosing Cap or Scale will depend on not only the amount of cells that are maxed at 127. In almost all cases, whether it is a 2 cycle or 4 cycle engine, golf cart backfiring is caused by the accelerator cable being out of adjustment at the throttle plate of the carburetor. As such, it does not require an add-on device. Harley-Davidson: 1. What happens is that the mixture leans out enough to where it fails to ignite consistently. 204 East 15 th Street. The 2010 Triumph Thunderbird’s wings have shapeshifted into a massive parallel-twin motor. ) problem and can not be fixed with air/fuel mixture changes. I have found that almost all of the time any backfire when you get off the gas is due to an air leak. Second, that decel pop may not be a backfire (though im leaning towards is since you say it does it at idle as well) try this, while it is popping on decel squeeze the clutch. Idles poorly - Fluctuations in idle RPM, stalling. Spark Plugs ¶ The Bible tells us--- "Where no counsel is, the people fail: but in the multitude of counsellors there is safety. Actually, deceleration popping (backfire) is caused by a lean condition. If it's at Decel it's not really a backfire, it's most likely excess fuel being burned off inside the exhaust. Other Causes of Backfire During Acceleration and Deceleration: Bad ignition system wiring. This website was created so ninjette owners (and potential ninjette owners) can show off their bikes, ask and answer questions about their bikes, and write up the adventures they're having with their bikes. Easy step by step guide on how to repair an automotive engine that is surging, this information pertains to most vehicles and is listed in the order of popularity. Maybe my linkage is overly tight, but it seems that just a little pressure on the pedal causes a little extra fuel and I get the effect. Check to see if the jets are clogged with debris or thick "gunk" that's causing your motorcycle to backfire. Backfiring is usually caused by the timing (Engine or ignition ) being out of adjustment. 96 S&S Adjustable Carburetor Support Bracket $19. fuel injected. On Harley-Davidson V-Twins with solid tappets. Backfiring - Popping out exhaust. As some have said, running straight pipes on the newer motors can cause this because of the tight specs. If the engine runs poorly you should address that symptom first. Start the motorcycle in neutral. The Carburetor Shop LLC. The Suzuki VS 1400 Intruder model is a Unspecified category bike manufactured by Suzuki. But that means that you'll have to program some throttle roll on anticipation enrichment. This has continued through 100 miles of riding. The engine will begin popping and backfiring, it acts like an engine out of time. And, as long as you're in there, you should clean the main jet, float valve, choke. Regards -- Roger. com is dedicated to the Honda CB750 SOHC and DOHC motorcycles and to their owners who love to ride, restore, and customize them. Think accelerator pump in the carb. But the bigger question is how does gas get there in the first place, and that’s a bit more complicated. Deceleration backfire harley · Video embedded · Nice capture about Amazing backfires of Harley-Davidson, huge acceleration, loud exhaust sound in fly-by. i have a 2004 bullet and here's my current dilemma: i recently replaced the rubber ring connecting the carb to the engine as it was cracked and i was getting a lot of backfire. Improperly set idle mixture screws are often the reason for carburetor symptoms such as hesitation, rough idle, backfire, stalling, hard starting, engine surge, and. If you don't have a late-model Holley w/backfire check-valve, install one. Backfiring can be used to describe combustion occurring through the intake (traveling backwards) or through the exhaust, although this is also called afterfire. See full list on motorcyclemd. Not every backfire blows powervalves though. I have a $500 Dakota Digital Speedometer to go with it (needs installed). We actually experienced more backfiring when we drilled our stock baffles. Home | History | F. Eldon, Missouri 65026. The Suzuki VS 1400 Intruder model is a Unspecified category bike manufactured by Suzuki. Harley-Davidson's SE Pro EFI Race Tuner is a map-based software program designed to modify the fuel map in the stock ECM. The Harley Davidson Sportster does not have a fuse box. Carburetor/manifold leaks are much less common. This is what we are going to discuss. Decel-Pop reduction The biggest complaint HD owners have with aftermarket exhaust systems is decel popping. This system is designed to improve emissions on stock exhaust systems, but will cause exhaust popping and backfiring when you fit aftermark. An open exhaust allows additional air to be “sucked up the pipe” during closed throttle and any unburned fuels, then ignite and “snap/crackle. Show Full Signature. Dime City Cycles is the premier choice for DIY custom motorcycle parts, accessories and life style gear. If there’s such a thing as a slayer of giants or, in this case, a Harley killer, then the 2010 Triumph Thunderbird is the spearhead and the first that really could matter. Sign in to make your opinion count. Heres a little about what I am running: 4speed with a mostly stock FE 360, with aftermarket headers and rebuilt stock heads, we did upgrade to an edelbrock aluminium 4bbl intake as well. I am making sure the timing is at. Backfiring on the other hand can sound like a shotgun going off with a big boom. Thanks for all the great info on this board, as I made it a long way diagnosing the other componets to find this issue. This should not last for more than a few minutes. To fix the problem I re-adjusted the valve lash again, but this time I adjusted the intake valves a little on the looser side (0. 3 sportster sputtering and backfiring after washing. 5 but also the load range they are located. phone: 828-645-0017 Contact Us. Lean = decel pop! As said above check your exhaust flange nuts, Bottom flange bolts 20 in lbs then top 20 in lb, then bottom 60-80 in lbs, then top bolt 60-80 in lbs. With short open pipes it's almost impossible not to have popping. I switched to closed choke and it fired up. 2 Black smoke coming out from the exhaust. I'm sure this is a tired topic, but does anyone have advice about curing the backfiring on my 2000 R1100R. I used the Harley gaskets on mine when I went to the Muzzy exhaust - never a backfire or even a hint of it. com/493423 ★Spotify: h. The Carburetor Shop LLC. Decel pop is a fairly common issue when you start modifying the intake and exhaust on fuel injected motorcycles. 69 M code Mach 1, 393w AFR 185, AOD trans, 3. The engine must be at full operating temperature. During installation, they can be rotated to fit your individual styling preferences, leading in subtle differences from one bike to another, as shown in the. This is what we are going to discuss. Always change your exhaust flange gaskets whenever removing or having loosened your head pipes. Note: Main jets supplied by CVP are sized to original OE specifications from H-D and Keihin. So to prevent you from failing Spark Plug reading here is a multitude of counsellors in picture form. The cause of the backfiring under deceleration is the installation of a non stock exhaust and that the bike has pair valves. i have a 2004 bullet and here's my current dilemma: i recently replaced the rubber ring connecting the carb to the engine as it was cracked and i was getting a lot of backfire. Decel-Pop reduction The biggest complaint HD owners have with aftermarket exhaust systems is decel popping. Not now!! Within 10 minutes, I had the correct MAP installed that virtually eliminated the deceleration embarrassment! I’m going to plug it in and run the Autotune to fine-tune the ECU. Rc backfire exhaust kit - emit Trending Price is based on prices over last 90 days. More than likely the backfire is caused by oxygen in the exhaust system. This lasts only a few seconds before it shuts down completely. On bikes that keep the injectors on during deceleration adjustments to the fuel table in the zero percent fuel column from 2,000 rpm to redline may help reduce popping. So, there’s two different things that can be happening here: 1-The rider is doing it on purpose. I replaced the fuel and vacuum lines and fuel filter thinking there might be a vacuum leak because the hoses on the intake were almost ready to fall off!! That didn't fix it. harley davidson 2002 softail deuce, systems for worn piston rings; harley davidson 2003 heritage softail rectifier diagnosis; harley davidson 2005 softail deuce electrical schematic; harley davidson 2009 softail backfiring problem; harley davidson flstci heritage softail classic 2005 service specifications. However lately the burbling has been getting louder and the past couple days I've gotten what almost sound like backfires but they're not quite that loud. Other Causes of Backfire During Acceleration and Deceleration: Bad ignition system wiring. Exhaust leaks. The secondary air injection system (PAIR) routes fresh air from the airbox to the exhaust system in order to aid the combustion of unburned fuel in the exhaust. Generally, there are a variety of ways it gets there, and a variety of things that can make the backfiring worse. These problems includes information received by NHTSA from consumers either directly or as recorded by the Vehicle Safety Hotline. But that means that you'll have to program some throttle roll on anticipation enrichment. Backfiring - Popping out exhaust. Show Full Signature. The engine backfire on deceleration is also caused by the too lean air/fuel ratio - A lot of people think that the backfire/popping in the exhaust is caused by too rich mixture, but it's actually the other way round. On a street bike, the rule of thumb is to adjust the fuel mixture screw out in ½ turn increments to add fuel. To fix the problem I re-adjusted the valve lash again, but this time I adjusted the intake valves a little on the looser side (0. This can be in eather the intake or the exhaust. Backfiring can be used to describe combustion occurring through the intake (traveling backwards) or through the exhaust, although this is also called afterfire. And, no, it won't hurt anything. Generally speaking, an exhaust pop on deceleration will come from a lean condition, and there are several things that could cause that. Hydraulic Tappets. We take a minute to break it down for you and show you a simple way to fix it with a Dynojet Power Vision. Learn about what advanced microsatellite instability-high (MSI-H) and dMMR cancers are, including how a test for MSI-H and dMMR cancers works. During installation, they can be rotated to fit your individual styling preferences, leading in subtle differences from one bike to another, as shown in the. So I'm wondering if this is normal on other R1200RTs or if I should consider a trip to the shop. All fuel injection systems turn off the fuel during deceleration when the throttle is fully closed, then turns the fuel back on down to idle once the engine reaches a predetermined r. According to Harley-Davidson, carbureted models should be started on the enricher and allowed to idle for maybe 30 seconds; after that you can push the enricher back in as soon as the engine runs. This topic generates a lot of concern from inexperienced riders, or even from experienced guys who just hate the noise, so lets take a look at what causes it. The FP3 has you covered. Decel pop is a fairly common issue when you start modifying the intake and exhaust on fuel injected motorcycles. If your having backfire during acceleration then your exhaust has one **** of a leak on it or there is a problem with your ignition system, if its on decel then you need the flash. I did adjust the IMS but either lean or rich settings still resulted in poppipng/backfiring on deceleration. Regards -- Roger. What the Home Mechanic Needs to Know About O2 Sensors - An Article from the OBDII Technical Library. 05 trx450r backfire on deceleration I just got a 05 trx450r and it backfires on deceleration after a 1/4 -1/2 or more throttle usage. What the Home Mechanic Needs to Know About O2 Sensors - An Article from the OBDII Technical Library. Deceleration backfire harley · Video embedded · Nice capture about Amazing backfires of Harley-Davidson, huge acceleration, loud exhaust sound in fly-by. Deceleration Backfire. Backfiring on deceleration is much more common and often occurs when exhaust and fuel mixture changes are made. I let it warm up for a good 5-6 minutes (1 cigarette's worth of time) before I pull off. On a street bike, the rule of thumb is to adjust the fuel mixture screw out in ½ turn increments to add fuel. - Deceleration backfires in the exhaust reduced to a minimum This version of the BoosterPlug covers all versions of the Harley Davidson Dyna Low Rider FXDL. | Orders | Contact Us | SELL TO US Carburetors | Repair Kits | Other. Backfire? I will get right to the point. For older Magnetti Marelli fuel injected bikes, adjusting the fuel table to. Most exhaust popping on a Harley is actually deceleration backfire. Exhaust leaks. Remove that system, and your chances of backfiring drop to almost nothing unless you have exhaust leaks. Check to see if the jets are clogged with debris or thick "gunk" that's causing your motorcycle to backfire. According to Harley-Davidson, carbureted models should be started on the enricher and allowed to idle for maybe 30 seconds; after that you can push the enricher back in as soon as the engine runs. The front mount is sagging causing the top curvature of the rubber mount to rub on the metal frame transferring vibrations. Note: Excessive “bluing” of exhaust pipes/mufflers is usually a symptom of inferior chrome plating compounded by excessive leanness which causes higher than normal exhaust temperatures. The cause of the backfiring under deceleration is the installation of a non stock exhaust and that the bike has pair valves. Air/Fuel Mixture Tuning Guidelines. Mainly happens under hard acceleration and wide open throttle, although it has cut out a time or two going from 1st to 2nd w/o wide open throttle just fast climbing rpms. So, the popping you are hearing is not back-firing. Backfiring on deceleration is air getting into the exhaust and igniting unburned fuel. No ifs ands or buts, that’s what causes it. Remove that system, and your chances of backfiring drop to almost nothing unless you have exhaust leaks. Popping on decel - YouTube. This lasts only a few seconds before it shuts down completely. If your having backfire during acceleration then your exhaust has one **** of a leak on it or there is a problem with your ignition system, if its on decel then you need the flash. Generally, there are a variety of ways it gets there, and a variety of things that can make the backfiring worse. Anyways, the pipe added quite a few ponies (Noted by the close race between me and my friends ZX-7). If this is the case no adjustments made by the Power Commander, or any piggyback device, can help reduce this problem. A shot of fuel as you roll the throttle back on. Hmmmm, Decel popping. So, there’s two different things that can be happening here: 1-The rider is doing it on purpose. These problems includes information received by NHTSA from consumers either directly or as recorded by the Vehicle Safety Hotline. They are recommending trimming a little off the top of the rubber to gain a clearance of 0. More like a loud slap than a burble. It still burbles and pops a little on deceleration but no longer backfires loudly between gear changes. All high output engines are prone to destructive tendencies as a result of over boost, misfueling, mis-tuning and inadequate cooling. The Harley Davidson Sportster does not have a fuse box. I am making sure the timing is at. On decel, you are sucking air back into your hot exhaust system. Something you should understand before going any further is that a motor in perfect tune will exhibit deceleration backfiring. There are 3 complaints filed for the 1998 HARLEY DAVIDSON ROAD KING. For your gasoline-powered golf cart to operate properly, the microswitch must click before the accelerator throttle plate moves. hello all, learning more and more about this bike as time goes on. Tech Tip - Backfiring or Popping on Deceleration More than likely your engine is "popping" not really backfiring. I had the jets done and now, unless the idle is set too high (doesn't backfire but gathers speed through high gears), the backfire occurs everytime during. Motorcycle discussion forum. OK, I know how to fix it, I've owned a Harley and stayed in a Holiday Inn Express. I’m loving it!. Backfiring on deceleration is much more common and often occurs when exhaust and fuel mixture changes are made. Close the petcock and run the. I don't usually get more than one load or noticeable pop during deceleration vice a series of pops. Instructions. Harley-Davidson Sportster Motorcycles from 1986 to Present. It runs great however it was idling at 2000 rpms. HD pn 17048-98. com 1 What Causes Backfire? 2 Why does my bike backfire on deceleration? 2. With the ignition key in the OFF position and the seat completely removed, press the accelerator pedal down. Well, I have it now! After farting around with the scoot I have a most definitive answer as to what is causing it. Home | History | F. decel crackle - YouTube. No ifs ands or buts, that’s what causes it. Show Full Signature. This allows un-burnt fuel to get into the exhaust pipes. This topic generates a lot of concern from inexperienced riders, or even from experienced guys who just hate the noise, so lets take a look at what causes it. Not every backfire blows powervalves though. A shot of fuel as you roll the throttle back on. If that doesn't work, change: in this order: handle bars, then pegs. the factory Harley has a very rich cold start cycle programmed into it to prevent engine damage while the engine is warming up, adding the Fuelpak can make this cold start cycle even richer. DIAGNOSE – ENGINE STALLS WHEN COMING TO A STOP OR ON DECELERATION. Why does the bike pop on deceleration? The bike is jetted very lean from the factory. The last few days, my KMD 150 GY6 would start dying at intersections and give an every-now-and-then backfire. Golf Cart Backfires When Throttle Plate Doesn’t Close Correctly. This is what we are going to discuss. Well, I have it now! After farting around with the scoot I have a most definitive answer as to what is causing it. Note: Main jets supplied by CVP are sized to original OE specifications from H-D and Keihin. I noticed when I let off the throttle the AFR leans out to about 34-35ish after a second or two and that's when the exhaust would have a loud backfire/pop. 3 sportster sputtering and backfiring after washing. Mine has been doing it for a while, especially if I do not completely close the throttle during deceleration. Enter a comment or answer to this message You can post your question, answer or comment as a guest. So, there’s two different things that can be happening here: 1-The rider is doing it on purpose. Triumph’s Thunderbird is Harley-Davidson’s worst nightmare. Lean = decel pop! As said above check your exhaust flange nuts, Bottom flange bolts 20 in lbs then top 20 in lb, then bottom 60-80 in lbs, then top bolt 60-80 in lbs. I opened it and it died. The Harley Davidson Sportster does not have a fuse box. -1991 Harley Sportster 883 XL-2000 Yamaha XV125-2003 Piaggio Fly it seems to have taken care of my backfire on decel. In this version sold from year 1994 , the dry weight is 243. Close the petcock and run the. I would replace the spark plugs, and inspect the wires, cap and rotor (most newer vehicles don't have the cap and rotor button). Read honest and unbiased product reviews from our users. The Suzuki VS 1400 Intruder model is a Unspecified category bike manufactured by Suzuki. It misses, and if it’s in a really “bad” mood it stalls and backfires. by Kyle McFadden. If it is too lean on the pilot circuit it will backfire like a son of a gun on decel I have had personal experience with this exact issue several times with 4-strokes with pipes and filters, and on all counts a richer pilot along with main was the cure. Backfiring on deceleration is much more common and often occurs when exhaust and fuel mixture changes are made. But first things first, lets define the issue: Deceleration Backfire is caused by fuel burning in the exhaust manifold or header. Just pondering if there is anyway to "disable" fuel cut under deceleration as in no fuel cut on decel, just letting the remaining unburnt fuel exit out the back? The reason I ask is cause back when i had an SRT-4, the exhaust just sounded so bad-ass with the loud rumble, popping, and gurggles when slowing down or letting off the accelerator. Deceleration backfire harley · Video embedded · Nice capture about Amazing backfires of Harley-Davidson, huge acceleration, loud exhaust sound in fly-by. Jump to Latest Follow 1 - 7 of 7 Posts. Backfiring on decel indicates too lean in the pilot circuit. Other causes of backfire are bad or weak fuel pumps, low fuel pressure, or clogged fuel filters. There is an internal service bulletin in which. President Trump's trade policy is backfiring. It has Vance and Hines Big Shots and a Screamin Eagle air filter. Your bike is set up to be richer than optimal for a clean burn, as a means of reducing temps. 69 M code Mach 1, 393w AFR 185, AOD trans, 3. If this doesn't stop the pop then richen up your mixture screw a little, if you can't tune it out with the mixture screw then may have to go up a jet size. Deceleration backfire is caused by fuel burning in the exhaust manifold or header. DIAGNOSE – ENGINE STALLS WHEN COMING TO A STOP OR ON DECELERATION. This issue is caused by: Incorrect timing; Too much fuel; Loose exhaust pipe; Too short of exhaust; Too little fuel; Intermittent spark; I have worked on dozens of motorcycles over the years and backfire issues seem to come around every once in a while. How to install an aftermarket air cleaner on your Harley Lemmy Shop the gear Gasbox Carburetor Support Bracket For Harley Sportster 1957-1985 $23. You can enrich the idle mixture by removing the pilot screw cap and backing the screw out 1/2 to 3/4 turn from its factory setting. Dime City Cycles is the premier choice for DIY custom motorcycle parts, accessories and life style gear. Cyclepedia Press, LLC 42 Wooten Cove Road Suite 2 Weaverville, NC 28787 · USA. Harley davidson backfiring through exhaust. Just pondering if there is anyway to "disable" fuel cut under deceleration as in no fuel cut on decel, just letting the remaining unburnt fuel exit out the back? The reason I ask is cause back when i had an SRT-4, the exhaust just sounded so bad-ass with the loud rumble, popping, and gurggles when slowing down or letting off the accelerator. Decel backfires are caused by both rich and lean conditions and depends on the engine build components. On decel, you are sucking air back into your hot exhaust system. Here’s the first thing to check before delving deeper into your backfiring problems. With thousands of tunes to choose from in our library, finding the perfect tune is quick and easy. This is what we are going to discuss. Dig the copper crush washers out of the head and replace them with new copper crush washers. The MAF or Mass Air Flow sensor (if present) is the main sensor used by the ECM to determine Fuel Delivery. In this version sold from year 1994 , the dry weight is 243. Think accelerator pump in the carb. harley davidson 2002 softail deuce, systems for worn piston rings; harley davidson 2003 heritage softail rectifier diagnosis; harley davidson 2005 softail deuce electrical schematic; harley davidson 2009 softail backfiring problem; harley davidson flstci heritage softail classic 2005 service specifications. If you don't have baffles, torque cones, or a butterfly installed your going to get popping and some backfiring on deceleration. Then suddenly, my friend informed me that his harley just acting up and it backfiring and popping. i cant get a hold of the guy who owned it before me so i cant ask him about the bike but he did say it had a big bore kit. I own a 1991 VFR. Something you should understand before going any further is that a motor in perfect tune will exhibit deceleration backfiring. I have found that almost all of the time any backfire when you get off the gas is due to an air leak. Backfiring, is extremely rare these days with electronic ignitions and the high reliability of engines. since the swap the engine starts well and runs strong but backfires on deceleration. This has continued through 100 miles of riding. The last few days, my KMD 150 GY6 would start dying at intersections and give an every-now-and-then backfire. No ifs ands or buts, that’s what causes it. Cette vid o a t envoy e partir d'un t l phone Android. I recently purchased TBR's new countermeasure 2 racing exhaust (Oval Canister). This electrical pulse is what causes the spark plug to spark and ignite the fuel in its cylinder. The MAF or Mass Air Flow sensor (if present) is the main sensor used by the ECM to determine Fuel Delivery. What the Home Mechanic Needs to Know About O2 Sensors - An Article from the OBDII Technical Library. Other causes of backfire are bad or weak fuel pumps, low fuel pressure, or clogged fuel filters. It is a popping resonating sound generated by a lean condition on deceleration. Thanks for all the great info on this board, as I made it a long way diagnosing the other componets to find this issue. Read honest and unbiased product reviews from our users. I don't usually get more than one load or noticeable pop during deceleration vice a series of pops. Power Vision for Harley-Davidson. I let it warm up for a good 5-6 minutes (1 cigarette's worth of time) before I pull off. If this is the case no adjustments made by the Power Commander, or any piggyback device, can help reduce this problem. 2011 Cross Country 2007 Harley Street Bob V&H Big Radius pipes Stage one breather 1972 FLH (been through 3 wives and still loves me) 1976 Jeep CJ5 my orange turd 2008 Silverado 2005 Trailblazer 2004 V92TC GONE. Well almost instantaneous, within the next few miles, I get hesitation, mild sputtering and poppy sounding backfires when decelerating. This website was created so ninjette owners (and potential ninjette owners) can show off their bikes, ask and answer questions about their bikes, and write up the adventures they're having with their bikes. Popping and backfiring on decel is often a case of fuel getting into the exhaust unburned and finishing it's combustion in the pipe. When the rear exhaust is open, the front exhaust is closed. I am a first time Triumph owner having been a Harley guy before so I know nothing about these bikes. org: Welcome to ninjette. Not now!! Within 10 minutes, I had the correct MAP installed that virtually eliminated the deceleration embarrassment! I’m going to plug it in and run the Autotune to fine-tune the ECU. Backfiring can be used to describe combustion occurring through the intake (traveling backwards) or through the exhaust, although this is also called afterfire. Backfiring on deceleration is much more common and often occurs when exhaust and fuel mixture changes are made. If fuel and electrical is all good/correct it is often the case in these symptoms that motor cycle spark plugs that although looking good and firing outside of the engine are breaking down and will not fire under compression pressures on a power stroke but will fire unburned fuel on the. I replaced the fuel and vacuum lines and fuel filter thinking there might be a vacuum leak because the hoses on the intake were almost ready to fall off!! That didn't fix it. But the bigger question is how does gas get there in the first place, and that’s a bit more complicated. Not every backfire blows powervalves though. " Proverbs 11:14. Rc backfire exhaust kit - emit Trending Price is based on prices over last 90 days. The engine runs normally otherwise. For those of you who haven't noticed or are stuck back in the 80's, a large number of the bikes coming from Milwaukee have fuel injection installed. I had the jets done and now, unless the idle is set too high (doesn't backfire but gathers speed through high gears), the backfire occurs everytime during. I have found that almost all of the time any backfire when you get off the gas is due to an air leak. This can be in eather the intake or the exhaust. Check to see if the jets are clogged with debris or thick "gunk" that's causing your motorcycle to backfire. Popping and backfiring on decel is often a case of fuel getting into the exhaust unburned and finishing it's combustion in the pipe. How to install an aftermarket air cleaner on your Harley Lemmy Shop the gear Gasbox Carburetor Support Bracket For Harley Sportster 1957-1985 $23. The last few days, my KMD 150 GY6 would start dying at intersections and give an every-now-and-then backfire. After you've spent a grand to two, TAKE IT TO A MECHANIC THAT REALLY KNOWS WHAT HE IS DOING, instead of asking this merry band of idiots. That means: - check exhaust valve clearances are in spec - check and replace any defective exhaust gaskets at the headers (just do this as a matter of course since they are so cheap) - check exhaust nut torque and re-torque if necessary. The reason you do not hear this on a bike with a stock exhaust is due to the baffling of the stock exhaust. That's the answer I was looking for. Learn about what advanced microsatellite instability-high (MSI-H) and dMMR cancers are, including how a test for MSI-H and dMMR cancers works. If fuel and electrical is all good/correct it is often the case in these symptoms that motor cycle spark plugs that although looking good and firing outside of the engine are breaking down and will not fire under compression pressures on a power stroke but will fire unburned fuel on the. For your gasoline-powered golf cart to operate properly, the microswitch must click before the accelerator throttle plate moves. Note: Excessive “bluing” of exhaust pipes/mufflers is usually a symptom of inferior chrome plating compounded by excessive leanness which causes higher than normal exhaust temperatures. Thread Tools. 5 in most cases we would recommend capping, especially if the cells are in the lighter load or decel area. HD pn 17048-98. I wanted a bigger bike, so I just bought a 2006 FXDL Lowrider with only 3,000 miles on it. Under this circumstance, the low speed fuel circuit needs to be adjusted. Mine has been doing it for a while, especially if I do not completely close the throttle during deceleration. This website was created so ninjette owners (and potential ninjette owners) can show off their bikes, ask and answer questions about their bikes, and write up the adventures they're having with their bikes. Generally, there are a variety of ways it gets there, and a variety of things that can make the backfiring worse. The backfiring during acceleration is a serious engine related (cam timing, bad valve seat seal, etc. MAF sensors usually consist of a tube that may or may not contain passages but all types contain some kind of sensing element. Btw, backfire usually is from running lean. Generally speaking, an exhaust pop on deceleration will come from a lean condition, and there are several things that could cause that. harley davidson 2002 softail deuce, systems for worn piston rings; harley davidson 2003 heritage softail rectifier diagnosis; harley davidson 2005 softail deuce electrical schematic; harley davidson 2009 softail backfiring problem; harley davidson flstci heritage softail classic 2005 service specifications. Close the petcock and run the. This decel pop can range from a small firecracker to large bangs depending on the configuration. The Carburetor Shop LLC. 30 Questions View all. Okay guys, no one really came to my rescue on this one. The bike has had a backfire since I've had it. In this case, your car will still run but the engine will turn off after some time. Would some carb attention assist the first two, and is it good preventive maintenance anyway? Could attempt over winter. That's the answer I was looking for. I did adjust the IMS but either lean or rich settings still resulted in poppipng/backfiring on deceleration. If the engine runs poorly you should address that symptom first. This website was created so ninjette owners (and potential ninjette owners) can show off their bikes, ask and answer questions about their bikes, and write up the adventures they're having with their bikes. Backfiring on decel indicates too lean in the pilot circuit. Just because your exhaust is popping, doesn’t mean there’s anything wrong. Popping on deceleration is due to unburnt fuel being ignited in the exhaust. Decel-Pop reduction The biggest complaint HD owners have with aftermarket exhaust systems is decel popping. It has 400ex front end, 250r Rear end. This is where we will post notices about the forums and system status updates. For older Magnetti Marelli fuel injected bikes, adjusting the fuel table to. Why does the bike pop on deceleration? The bike is jetted very lean from the factory. I wanted a bigger bike, so I just bought a 2006 FXDL Lowrider with only 3,000 miles on it. woody80z28. It has Vance and Hines Big Shots and a Screamin Eagle air filter. And, as long as you're in there, you should clean the main jet, float valve, choke. This website was created so ninjette owners (and potential ninjette owners) can show off their bikes, ask and answer questions about their bikes, and write up the adventures they're having with their bikes. Popping and backfiring on decel is often a case of fuel getting into the exhaust unburned and finishing it's combustion in the pipe. Your bike is set up to be richer than optimal for a clean burn, as a means of reducing temps. Exhaust backfire on deceleration - Holley Performance Products Forums. They represent freedom, independence, and the open road. There is always some unburnt fuel in the exhaust gases. When it doesn't, there is an interruption in the engine's operation. Hmmmm, Decel popping. Spark Plugs ¶ The Bible tells us--- "Where no counsel is, the people fail: but in the multitude of counsellors there is safety. All high output engines are prone to destructive tendencies as a result of over boost, misfueling, mis-tuning and inadequate cooling. Read honest and unbiased product reviews from our users. 99 Gasbox Carburetor Support Bracket For Harley Sportster 1991-2006 $34. NEW Vance & Hines 66007 Fuelpak FP3 J1850 Harley Davidson. 80 Z28 383/6spd Camaro build thread 91 "SS" 3. Generally speaking, an exhaust pop on deceleration will come from a lean condition, and there are several things that could cause that. I decide to ride his Harley and it won't start on open choke during hot weather (It normally fires up happily on warm day with open choke). Deceleration Backfire. org, the friendliest Kawasaki Ninja 300/250R site on the net. 96 S&S Adjustable Carburetor Support Bracket $19. I replaced the fuel and vacuum lines and fuel filter thinking there might be a vacuum leak because the hoses on the intake were almost ready to fall off!! That didn't fix it. Cette vid o a t envoy e partir d'un t l phone Android. If it is popping out the exhaust then either unburned fuel is getting into the hot exhaust pipes an igniting or the timing is too far retarded. org, the friendliest Kawasaki Ninja 300/250R site on the net. The airflow into the motorcycle is increased because of the difference in pipe design and other specifics. More like a loud slap than a burble. Staintune equiped - no cat. Stalling and Backfiring The engine might be turned off suddenly It’s another issue that indicates a malfunction of the sensor, and one of the crankshaft position sensor symptoms. to/31QBl5z ★Check out the FIve Dirty Bikers Podcast★ http://www. Air/Fuel Mixture Tuning Guidelines. On the SERT [screaming eagle race tuner] there is a table called "Decel Enleanment" where you can adjust how much the fuel is cut back when the throttle closes. The Deceleration Pop Problem Decel Pop is many times a nasty issue to deal with. Btw, backfire usually is from running lean. More than likely the backfire is caused by oxygen in the exhaust system. There is always some unburnt fuel in the exhaust gases. Adjust the push rod, when the valve is closed, so that it turns easy with no up and down play, both intake and exhaust. recently did a motor swap to a newer Jasper engine I had from my 1987 f-350. i have a 2004 bullet and here's my current dilemma: i recently replaced the rubber ring connecting the carb to the engine as it was cracked and i was getting a lot of backfire. Backfiring can be used to describe combustion occurring through the intake (traveling backwards) or through the exhaust, although this is also called afterfire. (The pilot screw is located on the engine side of the carb, in front of the bowl, on the bottom. In this version sold from year 1994 , the dry weight is 243. Parts for Harley CV carburetors. since the swap the engine starts well and runs strong but backfires on deceleration. I switched to closed choke and it fired up. In general, backfiring on deceleration (as opposed to acceleration) is generally caused by a lean condition in the pilot circuit. Backfire? I will get right to the point. Dig the copper crush washers out of the head and replace them with new copper crush washers. Shop our complete selection of Cruiser Motorcycle parts and accessories including the Baron Custom Accessories Air-Injection Removal Kit - BA-2551-00. #greategretmoto #decelpop Ares Stud Extractor: https://amzn. Backfiring on deceleration is much more common and often occurs when exhaust and fuel mixture changes are made. Click for info on curbside pickup available at Cycle Gear stores & how we’re working to ensure a safe shopping experience. With thousands of tunes to choose from in our library, finding the perfect tune is quick and easy. 0 out of 5 stars 3. Deceleration Backfire. Use these simple tips to adjust the idle mixture screws on Holley carburetors to eliminate hesitation, rough idle, backfire, stalling and more Holley carburetors have idle mixture screws that control the air/fuel ratio at idle. How to install an aftermarket air cleaner on your Harley Lemmy Shop the gear Gasbox Carburetor Support Bracket For Harley Sportster 1957-1985 $23. The backfiring during acceleration is a serious engine related (cam timing, bad valve seat seal, etc. When the rear exhaust is open, the front exhaust is closed. ) problem and can not be fixed with air/fuel mixture changes. During decel, you are going to get some unburned fuel mixture passing through the engine if you have any valve overlap at all. Just because your exhaust is popping, doesn’t mean there’s anything wrong.