Harley backfiring on deceleration A lot of posters have reported this problem when changing out pipes/mufflers. College Station, TX, USA . The bike will most likely still have some amount of minor backfiring which should be considered a normal condition for that performance set up. Free Maintenance course Join my FREE maintenance course to achieve quality General Tech Harley Davidson. When I first installed the exhaust I had the same difficulty, backfiring when you let off the "Deceleration Backfiring" is the most common backfiring that occurs when you change down and throttle off. A forum community dedicated to Harley Davidson V-Rod Motorcycle owners and enthusiasts. That was a pretty good deal. Newbie. So, I'll live with it. The Harley service tech told me it's a sportster thing. I put the replacements on but put the umbrella on the wrong hole and I was getting a wet oily air filter and would get backfire every now and then. This mini-explosion can be quite scary for a rider and See more My daughter's S40 Boulevard was backfiring on deceleration. OEM Parts Finder Granite State Harley-Davidson Lebanon, NH (603) 448-4664 You may not need a rebuild kit, but it is a good thing to always have one on hand just in case you need to replace something. Backfire backfires loud backfiring popping hear explosions comparable noiseDeceleration backfire: easy carb tuning Backfire motorcycle does why complete guide exhaustBackfires backfire diagnose manifold leaking originate gasket cracked. The dyno MAY fix most of the deceleration backfiring, but typically not all of it. Bob with V&H 3 1/4" drags, with air n programming to use them properly. The deceleration is for sure in the pipes. Leading me to suspect a lean condition from either improper jetting and /or an air leak from intake seals or in GOT BACKFIRING? Backfiring in the General Tech Harley Davidson. I let it run in idle for a few minutes to try and get the sea foam moving and We personally accept the occasional backfire in trade for perfect fueling (in terms of outright performance). “In general, backfiring on deceleration (as opposed to acceleration) is generally caused by a lean condition in the pilot circuit. I would like to get the idle up a bit and also get rid of the sputtering, coughing and backfiring. fateee Discussion starter. 682. it changed w/ the heat/ humidity and "bad air" here in the summer in Harley Davidson rear signals, Fenderectomy, Formula 1 mirrors. 03 DYNA 95" 45 Mikuni T-header V-Twin Harley Davidson forum. P: Au Nord de la SEINE Harley-Davidson: Plus de HD depuis 11/2016 Date d'inscription : 26/05/2008 . Ways to reduce and possibly eliminate this popping are listed below and can vary between Harley-Davidson motorcycles and sport bikes and cruisers: Harley-Davidson: I did read a few post on backfire, but i wanted to clarify my sitchy. par bulle Jeu 17 Sep 2015 - 8:35 +1340. Skno · Registered. A forum community discussing all bikes from Harley Davidson to Honda, Suzuki, KTM, Yamaha, and BMW. The popping sound is from unburnt gas in the exhaust that is ignited by the heat. My 02 883-1200 backfires and shoots flames when I let off the throttle. Though it has hiccuped after first starting. Jump to Latest 24K views 28 replies 18 participants last post by bobcat Jul 16, 2007. Unless it really bothers you (and IMHO as a big BMW fanboy it'd be like trying to take the vibration out of a Harley V-twin), I'd just leave it be - without pops, Motorcycles are a great way to get around, and they can be a lot of fun too. 8 posts · Joined 2002 Add to quote; Only show this user #1 · Jun 27, 2007. It’s not However, like any mechanical device, golf carts can experience issues, and one common problem is backfiring. Thread starter Write2Paul90277; Start date Jul 5, 2015; Help Support Classic Goldwings: This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others. dougfollett New member. 00 in repairs to nurse it home. May 9, 2010 It also sounded like the exhaust might have been a little louder than normal and I noticed some popping on decel Tried the sea foam. $49. Could be time to start disconnecting, spraying contact cleanier and checking all the EFI conmections for corrosion, including the main harness plug at the ECU. Having read the earlier replies, popping is not unusual when changing over to Topic: Backfire on deceleration (Read 4985 times) Hajya. Re: petarades importante a la décélération . Jan 10, 2024 · Several factors affect what happens during deceleration. 103 misfire and backfire issues. You know that when the exhaust valve closes, the flow out stops The backfiring during acceleration is a serious engine related (cam timing, bad valve seat seal, etc. 8 posts · Joined 2009 Add to quote; Only show this user #1 · Mar 3, 2010. One of the most common problems that customers complain about is the spit-cough-pop from the carburetor as a Harley goes from idle to ¼ throttle. I do want to mention now that the bike DOES NOT BACKFIRE, just a small to moderate amount of popping as I decelerate. Jul 2, 2010 · My 02 R1150RT started backfiring on deceleration more last fall. I took the top cover off and switched the umbrella to it,s proper position then re installed the cover. This extract from the Virago Site explains it succinctly. Mar 26, 2010 · Backfire (afterfire) on deceleration. About 400 miles on it, and it is stock. It has a Bassani Road Rage Exhaust in place of the stock exhaust. Harley Davidsons backfire because of a little explosion in the intake or the exhaust. Also, when I accelerate it feels like the engine skips almost like the engine is missing when the cylinders fire. Generally, there are a variety of ways it gets there, and a variety of things that can make the backfiring worse. Is this normal? I have a '00 Road King with aftermarket pipes (brand unknown), stage 1 download and upgraded intake (brand unknown). When entering a corner and letting off the gas I have a backfire. Sign in to contact. Backfiring on deceleration. E. By ensuring the appropriate adjustments to your golf cart’s engine, you can prevent such backfiring events. Harleys are prone to having their intake manifolds loosening up over time Backfiring on deceleration is generally caused or exacerbated by a lean fuel mixture. Write2Paul90277 Well-known member. J. A motorcycle exhaust backfire is an annoying and potentially dangerous problem to have. A lot of that same backfiring is happening CB750 backfiring on #2 cyl. Backfiring on deceleration - Yamaha Xv1100 Virago Xv 1100 1989-1998 Left Side Air Box Cover 1rm-14603-00. I have a 98 Dyna with stock Evo fairly new reman at HD in Sept 2010. It is simply a lean condition of sudden off-throttle that causes it, and it is actually dampened by the large volume stock muffler. I had a Yamaha V-Star 1100 that the PO when I bought it was "tuning it to sound like a Harley" (his words not mine). Save Share Reply Quote I just had Rinehart Slimline Duals and 4" chrome slipons installed on my 2015 RGU CVO. When the motorcycle's engine is revved, the mixture of fuel and air in the combustion chamber becomes very Deceleration back-fire or after-burn: if your motorcycle is carbureted, the common causes include: Lean air/fuel mixture. Rides great and love the acceleration power but on deceleration i get backfire/popping noises. However, excessive or frequent backfiring THE ROCK Harley-Davidson 2240 Long Lake Road, SUDBURY ON, P3E 5H4. jrw Discussion starter. However, like any mechanical device, golf carts can experience issues, and one common problem is backfiring. Looking at the Injector Off Pattern for Sound Optimized Torque Reduction table, the X Axis seems to be Engine Speed (RPM) and Y Axis is Cylinder. If air is leaking into the intake side it will lean out The important thing is to make sure you're not running it too lean. Over the winter I set the valves and synched the TB's. K&N lunch box, soon Progressive springs ecpreston. Author Topic: Helpstarted backfiring on deceleration (Read 5874 times) Tail dragger. Backfiring on deceleration is much more common and often occurs when exhaust and fuel mixture changes are made. 6 posts · Joined 2010 Add to quote; Only show this user #1 · Mar 26, 2010. It has Vance and Hines Slip-ons on it. S. "In general, backfiring on deceleration (as opposed to acceleration) is generally caused by a lean condition in the pilot circuit. When I took it out for a test ride I mentioned to the sales rep about the deceleration popping. 16,300 on new motor running finethen, I ran out of gas. Had it dyno tuned last week (116hp 85tq). This will reduce the backfire or after-burn effect. My Bike has always 'popped' on hard deceleration. Jump to Latest 19K views 16 replies 13 participants last post by Pat H Aug 30, 2018. Explore Our Forums. A lean or rich condition can be a result of a vacuum leak, blown exhaust gaskets, or internal carburetor problems. For the past year I have had backfiring on decel. No change. That will overheat your heads. When I decelerate the engine seems to pop and backfire slightly It is not very bad but sounds horrible and makes the bike sound cheap. Idle is ok, at about 900-1000. 1966 MG MGB 1980 MG MGB Limited Edition (LE) Topic Creator (OP) Dec 31, 2023 12:50 PM. 1987 - 1996 F150 & Larger F-Series Trucks - backfires on deceleration. Someone named Harleydave should know that a backfire when getting off the gas is COOL. Be careful when you remove the low speed mixture jet, there My 02 883-1200 backfires and shoots flames when I let off the throttle. 1978 Strokershovel Lowrider 100 inches. The most common reason for exhaust popping on deceleration is a lean condition. The pipe seemed tight, but when I started the motor, I They both happen when you roll off the gas, but decel pop is a quieter and prolonged stream of burbles, snaps, and bursts, while backfires sound more like one or two gunshots or firecrackers. With that said, the most common reason for popping on I've heard so many bikes pop on deceleration that I thought it was normal. H. Backfiring thru the carb. This mostly occurs when downshifting and in the last 1/8th of letting off the throttle. Mar 12, 2008 · Slight backfire on deceleration. 1974 Suzuki GT750 Lemans (Water Buffalo) deceleration eliminates the popping and when I don't the popping is minimal. A forum community discussing all bikes from Harley Davidson to Honda, Suzuki, KTM, Yamaha, This is simply too short and will often cause backfiring. Jump to Latest 13K views 8 replies 6 participants last post by h2omagnet Oct 19, 2014. 1 of 2 Go to page. 4 4. The cause of the backfiring under deceleration is the installation of a non stock exhaust and that the bike has pair valves. 195 main jet. Frustrating. However, if your motorcycle is popping or backfiring on acceleration, it can be really annoying and even dangerous. jschance Discussion starter. 190. I have a 2012 48 sportster with the vance and hines short shots, fuel pack and high flow air cleaner. I have a 2006 450r and I just installed a new fmf powerbomb header as well as a powercore 4 muffler. The backfire is a lean condition on decel 0% throttle If you had a tuner you could throw some fuel in the rpm range at the 0% throttle stage and it would stop it. Klein carbs some have a diaphragm that if it gets holes bike backfires on deceleration but gas milage goes down. 4464 Menu. If backfiring happens during acceleration, the cause could be different from backfiring during deceleration. Hey everyone, I just reassembled my 92' vn750 and the rear cylinder pops and backfires badly on deceleration. since the swap the engine starts well and runs strong but backfires on deceleration. 1996 FXDS-CONV S&S E. Note that this procedure either richens If your Harley is backfiring through the carb or cutting out, it’s likely due to an overly lean fuel mixture, a clogged fuel system, or a faulty ignition system. 99 $52. Typically, when the throttle cable is incorrectly adjusted, the throttle plate remains partially open. 855. by Runt777 » Sun Jan 20, 2013 1:33 am . Thread starter only occasionally on deceleration,on an FLHX. 75:1, Trick Flow 170s, 1-3/4" Headers, Backfiring on deceleration . Posted by Anonymous on Jan 06, 2014. Backfiring could also result from poor timing. Topic List Forum List Newer Older Start New Topic. What happens is that popping on deceleration. one eye Discussion starter. Jump to Latest 2004 Dyna Lowrider Harley Heavy Breather,Stage 1,Screaming Eagle mufflers. What it is, is incomplete combustion, fuel is left over, and shot into the exhaust pipes. If I can get some free time in the coming weeks, I'll try my best to do some additional anti-pop maps just for kicks. Backfire or Decel Popping. aggiebq86 Jim Ridgway. When your motorcycle runs with too rich or too lean air gasoline mixture, it negatively affects the internal temperature of the engine combustion chamber and may cause damage over time. Sudden Backfire and Loss of Power. 144 posts · Joined 2003 Add to quote; Only show this user #1 · Feb 19, 2004 (Edited) I have a 04 Fatboy injected with Air cleaner upgrade and SE II's and when I let off the gas I get a pop or backfire through Hi, I have a '01 dyna -w- 95in. gunnar88. This spring my surging was worse as well. 75:1, Trick Flow 170s, 1-3/4" Headers, 3/4 Race Cam, Edelbrock AirGap Intake, Holley 670 Street Avenger Excessively lean fuel mixture combined with insufficient spark advance on deceleration causing part of the combustion Looking for your thoughts on this issue. The heat from the pipes then ignites the vapor and boom, backfire. This GL1200A - Mild backfiring during deceleration. Don't overdo it EFI Decelleraton Pop and Backfiring. 3 posts · Joined 2014 Add to quote; Only show this user #1 · Oct 18, 2014. Backfiring on deceleration is Exhaust 'popping' on deceleration. Mine was always around 1500-2k that I would notice the change in sound. 4. Search 1. Jump to Latest 8. Behind the round cover on the cam case. 400ex backfiring on decel. 6 posts · Joined 2005 Add to quote; Only show this user #1 · Dec 27, 2005. Bike ran good, but if you let the throttle all the way off and starve it of air it would backfire like crazy and stumble on take off unless you wicked it up before you let out the clutch. Backfiring is BAD. Exhaust leak? Jump to Latest 15K views 13 replies 12 participants last post by 1945 Jun 16, 2010. If you are getting popping through the exhaust on deceleration or getting hesitation or backfiring on easy acceleration after the engine is up to it's normal temperature, you are dangerously lean. But there are other things that can cause that One of the most common problems that customers complain about is the spit-cough-pop from the carburetor as a Harley goes from idle to ¼ throttle. Backfires on deceleration is simply the process of burning the excess fuel left the combustion chamber. Screaming Eagle ignition,V&H Short shots. When I let the throttle close after The fix for a motorcycle backfire on deceleration involves tuning the slow-speed mix in the carburetor by means of the pilot (fuel) screw. Save Share Backfire (afterfire) on deceleration. Hi, I have a '01 dyna -w- 95in. :wink: 1965 Mustang 306, 10. Backfiring is a bonus and welcome. Popping on deceleration is due to unburnt fuel ignited in the exhaust. Block off the fresh air injection systems. I've shaved the ears, coastered it, rejetted the carbs with 42 and 142 jets (as per Phils ear shave procedure), and installed straight pipes. Jump to Latest V-Twin Harley Davidson forum. Car engine backfire when deceleratingBackfires hilux Backfire on deceleration Model A (1928-31) Try turning the fuel off about 30 seconds before you turn off the key. It takes three things to get backfiring in the exhaust. with a . Not a loud popping. Come join the A backfire is a loud pop or bang sound that comes from your exhaust pipes when your motorcycle is running. What happens with backfire pops on decel is the butterflies close and the vacuum from the engine pulls harder and will draw air from any leaks, give it a rev them while it is coming down spray and see if you get a rise in LOUD backfiring on deceleration -w- TC95,I've tried everything I know,HELP! Jump to Latest 21 - 30 of 30 Posts. T. After it warms up, it will cut out, backfire, and just die a lot while riding down the road– –Engine backfiring and stalling after it gets warm is a symptom of a failing cam position sensor (ignition pickup). Come join the discussion about modifications, troubleshooting adjustment , road tested and deceleration popping still there but not severe. It's easy to tune on your own without a dyno and it gets rid of the popping. Lol. Post Aug 28, 2023 #1 2023-08-28T17:11+00:00. If you've ever listened to the car while driving, you will notice it has that burble/popping as you decel down toward idle speed. Backfiring can be startling and potentially harmful to your golf cart if left unresolved. ) problem and can not be fixed with air/fuel mixture changes. Thoughts? Popping on deceleration can occur because of both lean and rich mixture – it’s very difficult to reliably tell which one is the culprit just from the popping sound only. Jump to Latest 62K views 24 replies 15 participants last post by flhxcrzy Aug 21, 2010. Leading me to suspect a lean condition from either improper jetting and /or an air leak from intake seals or in While riding bike, exhaust backfires/pops when letting off of the throttle in any gear, very annoying not just to me but to other riders. 256 Posts. I noticed after the car warmed up and on the way home, the car would pop and backfire though the exhaust on deceleration. Jump to Latest 21 - 24 of 24 Posts. It was cracked and dry, so I thought that might be the Adventures Airport Backfiring Bike Black Bonneville Certifications CFMOTO Challengers Champions Custom Dainese D-Air Deceleration Decel pop Dirt Ducati Edition Fest First Look Gear Harley-Davidson Hero MotoCorp Investment leather Lightning Limited MotoAmerica Motorcycle Motorcycles Oddities Offroad SLABSHOT Streetfighter suit Suzuki One of the most common problems that customers complain about is the spit-cough-pop from the carburetor as a Harley goes from idle to ¼ throttle. M. Backfiring on deceleration due to a lean condition is usually caused by fitting a free flowing exhaust or riding at a lower altitude. at the Backfiring on deceleration is usually caused by one of 2 things: 1) Loose exhaust fittings/seals 2) Lean fuel/air mixture 08 Harley FHTCU-12300 mi 09 Harley FLSTN -11457 mi 08 Burgman 400 -26302 mi 11 Burgman 400 white 15132mi 11 Burgman 400 silver 800 mi 08 Buell XB12R Firebolt 3450 mi. Discussion on V-Twin Harley Davidson motorcycles including Dyna, Electra Glide, Softail, Sportster, and more. Since you've modified it, now you do. Keep in kind that backfiring is often an indicator of a lean condition, especially when it occurs on decel. An annoying thing has been happening lately to my 97 Hardbody, 4WD, 5-speed, 190K+ miles. This explosion is supposed to happen in the combustion chamber of the Harley. I know this question has probably been covered a bazillion times but I just can't seem to find an answer that covers my backfiring and flames. Heat and quite a bit of it, unburned fuel and air containing 02. ” “My 2001 [Harley-Davidson] Road King (fuel injected) will run just fine for about 3-4 mi. Thanks . I let it run in idle for a few minutes to try and get the sea foam moving and I have a 05 1200C since adding Screaming Eagle slip on and having it rejetted by a harley service shop, it's backfiring thru the carberator, only on take off. More like a muffled popping each time I down shifted. No ifs ands or buts, that’s what causes it. Joined May 23, 2014 Messages 90 Backfiring on deceleration. Good Luck, Scott Ride a 09 Muscle (Vivid Black). So, just for anyone this may help, I've had popping on decel and the bikes felt flat- I tuned it w/ an RSR wideband gage/ O2 sensor last fall and it was good. Metric and other: 1. went to daytona and paid 1200. Lean air/fuel mixture from your motorcycle carburetor is caused by excess fuel burning in the exhaust piping or exhaust ports from a change in pressure. Deceleration Backfire - Lean Pop? by CRFBanshee » Mon Apr 26, 2010 4:29 am . Hang with me on this one. If anyone installs a "free-flow" aftermarket muffler it actually makes it worse and Dec 28, 2013 · Backfiring and sputtering after sitting. 2025 MODELS. 4464. I have a TFI that I bought from a Harley dealer for $99. Backfiring on decal is Sooooooooooo very common to not even be an issue unless it is overly loud. I'd also check all the connections on the intake side. (1998 FXSTS) Lately and it's happening more and more, I am getting backfires on acceleration (only after I close (push in) the enrichener), on deceleration and at times just in normal cruising. Ok in idle but anytime you give it gas, in gear, it sputters and backfires out of the exhaust and carb then dies. I turn my fuel off at the entrance to my driveway, then when I get in the garage the carb is quite low. I have a 2018 XP1000. If I lightly touch the accelerator it Popping on deceleration. After that the engine has started to pop and backfire with back pressure. Thread starter dougfollett; Start date Mar 12, 2008 ••• More options Who Replied? D. maksrmaksr Discussion starter. However, even after a new custom tune map from Fuelmoto (excellent customer service btw to Brian Harley-Davidson: FLSTF 2002 carbu + 883 XL Hugger 2002 Date d'inscription : 03/11/2009 . Save Share Reply Quote Like. 5. I have tried everything to get rid of this problem but can't seem to win. No problems at idle, acceleration, or cruising, just when I let off the gas. Bike Backfires on deceleration. Backfire aside, for a forum reference, I'd love to hear you feedback on outright performance. Joined Oct 1, 2009 · 6,686 Posts Dec 14, 2024 · If backfiring happens during acceleration, the cause could be different from backfiring during deceleration. Tried adjusting the enrichener, but would only raise the idle and would not stop the backfiring/popping. It Backfire on Deceleration. only changes at all is about 1/2 turn on throttle idle screw. Formula Extreme Racer; Posts: 339; Logged; Re: Deceleration Backfiring #3. Harley Davidson FXDL Dyna Low Rider 1999-2005 inter primary torque specs What are the torque specs for the inner primary on a Harley-Davidson. bulle Full Member Son Age: 66 Ville et C. Is this common? Has anyone figured it out? Could it be timing? I don't know anymore. Save Share 1971 School Bus Yellow "Spaghetti" Harley Backfire - Deceleration - WOW. Oct 1, 2016 My St. Springer Fan Member. Not so far on the FXDWG. O. For one it wants to pop a bit when decelerating. I only have a small amount which is normal. Backfiring: If you experience backfiring during deceleration, it may signal an air leak or improper jetting. Show Less . 2. I have a 2004 VTX 1300 that backfires on deceleration and does not have an exhaust leak and no other drivability symptoms. I'd still start by checking the exhaust connections, as the other oilheaders have suggested. 1 post · Joined 2018 Add to quote; Only show this user #1 · Aug 20, 2018. recently did a motor swap to a newer Jasper engine I had from my 1987 f-350. On deceleration from hi rpm's, I get multiple LOUD backfiring from the exhaust [not the usual popping] when I pull out the choke knob it stops. Oct 17, 2014 · Backfire on Deceleration. Backfiring on deceleration carb mixture #1. Backfiring happens all the time, in cars and bikes, you just don't hear it because the muffler/exhaust. Member Posts: 14 Tucson, Arizona. Keep reading to see some of the causes of a backfiring Harley-Davidson. As long as it doesn't hurt the engine, I say keep it Backfiring happens all the time, in cars and bikes, you just don't hear it because the muffler/exhaust. I believe a purely stock Harley with EFI is going to pop on decel, if tuned to factory specs and so on. Put 3oz in and fired it up. Adjusting the ignition table could also help in deceleration popping. 1 2. Runt777 Posts:3 Joined:Sun Jan 20, 2013 1:23 am. Anything and everything related to Harley-Davidson motorcycles and the people who Members Online • Ben_ji. ANy ideas or suggestions would be appreciated. Many Harley riders have seriously shortened the life of their carbed engines by running Harley-Davidson Bar & Shield Logo Zipper Rugged Graphic Duffel Bag - Black Wisconsin Harley-Davidson-6%. Any guesses on a Oct 1, 2009 · Backfires on deceleration. This is definitely not good when you are accelerating fast on a freeway. 9L. 1; 2; Next. Save Share Why does adding fuel in over-run change the backfiring? The answer to this one is not what everyone has been led to believe. The problem may just vanish. August 21, 2008, 07:53:15 PM. Posted by aggiebq86 . I'm looking for some mechanical advice from anyone smarter than me (that's pretty much mine came loose and was backfiring pretty bad until I tightened I spent some time with the guys that installed the computer on my bike. Raider; Join Date: Sep 2010; Posts: 6335; Referrals: 1; Helpstarted backfiring on deceleration « on: Jun 26, 2014, 03:34:20 pm » Now I know what others are talking about when they say their Raiders pop on decelerationmine just started after installing new plugs. After reading this post, I went looking for an exhaust leak. May 27, 2006 · **** backfiring on deceleration (help!!) Jump to Latest 5K views 11 replies 11 participants May 5, 2018 · 3. Who knows, maybe the leak has existed for such a long time that it seems like the bike has always backfired. The acceleration backfire is coming from the carb and rarely is heard in the pipes. On very short or open pipes, try baffles or increasing the baffle effect. Side note - I'm not experiencing any backfiring during deceleration. Thread starter Springer Fan; Start date May 9, 2010; 1; 2; Next. Joined 12 years ago. Jump to Latest 5. It can hurt your ears if you’re in a confined space, or could start a fire as some backfires even emit flames. WintrSol · Premium Member. By identifying the underlying problem and correcting it, you can often On decel with not enough air getting into the engine will cause fuel to burn in exhaust when it hits the air. Deceleration Backfire is caused by fuel burning in the exhaust manifold or header. In my experience, it is a rich mixture that causes this but it CAN be an intake leak or a lean mixture. It seems to run a little rough at times, with quite a bit of backfiring at deceleration out of the exhaust and the breather once in a while, along with hesitation at times as I start to accelerate. - I have a 1988 f-250 5. A little popping is normal for a bike that has little work done. If the exhaust is not sealed properly to the head, on deceleration, cool air can be sucked into the combustion chamber causing a lean condition and a small backfire. Why is my motorcycle backfiring? Someone named Harleydave should know that a backfire when getting off the gas is COOL. Mar 12, 2008 #1 I'm enjoying the heck out of my new to me, 1999 R1100RT but being unfamiliar with this particular bike I'm wondering if some of the things I am noticing are normal. Hey everyone, I ride an 08 Vulcan 900 custom and recently installed Cobra speedster shorts, Barons BAK, and fi2000r. inefficient systems will let the gases out randomly, and those gases will cause the backfiring (popping). Joined Nov 26, 2002 · 61 Posts #21 · Sep 5, 2003 (Edited Since I do quite a bit of cruising, I need a Harley sound but not a lot of My question refers to a slight backfiring and "skipping" problem. Jump to Latest 11K views 7 replies 5 participants last post by maksrmaksr Nov 29, 2009. A Harley, for example, will The Boulevard S40 with its one 650cc cylinder is known for backfiring on decel and mine does it, right on cue I am wondering if a faulty map sensor could cause backfiring during deceleration. Engine, Fuel and Exhaust . Aftermarket mufflers, tailpipes, and exhaust systems are made for a raucous and deafening result. 1. Discussion on V-Twin Harley Davidson motorcycles including Dyna, What Causes Exhaust Popping on Deceleration? Popping on deceleration can be caused by both lean or rich Air-to-Fuel mixtures. Poor Acceleration: Hesitation or lag when you accelerate often indicates an overly rich fuel mixture. Backfire on deceleration « on: June 23, 2014, 10:58:20 AM an old guy riding a harley, came back from daytona on his 96 dresser, one of our members had just purchased a new dresser. Come join the discussion about performance modifications, troubleshooting, maintenance, and more! Show Less . I need help. Manual says check several things, any logical order or suspected source of these problems? Thanx. 97. They’re loud! Backfiring during deceleration is typically caused by a lean air-fuel mixture, which may result from vacuum leaks, clogged fuel injectors, or incorrect carburetor settings. Hi, I just purchased my first Harley a couple of days ago an I have noticed a lot of popping when engine braking. Generally, there are a variety of ways it gets there, and a variety of things that can make the backfiring Backfiring on deceleration can be a symptom of lean fuel-air mix. Engine timing and exhaust system issues may also Backfires on closed throttle/deceleration. I immediately Stalling: If your Harley stalls frequently when idling, the carburetor might be set too lean. I installed a 160 main 42 pilot. Popping or backfiring while Deceleration Backfire - Lean Pop? CRFBanshee Posts:16 Joined:Sat Apr 17, 2010 4:08 am. Next Last. Installed their My '94 Heritage Softail started backfiring out of the exhaust when accelerating just the other day. 4 posts · Joined 2009 Add to quote; Only show this user #1 · Nov 15, 2009. May 9, 2010 #1 I Check out how easy it is to tune your carbs to eliminate deceleration backfire. Should you get 02 Sabre VT1100C2 Backfiring on Deceleration. During deceleration MAP is probably about as low as it gets and the fuel rate is almost zero, so there's not enough air or fuel to generate heat (to melt pistons) or pressure (i. Now it decel pops on occasion, when I'm not paying Deceleration pop, backfire through exhaust. As the rpm passed below 1796 Rpm the fuel is again "turned on". 1974 Suzuki GT750 Lemans (Water Buffalo) backfiring and popping on deceleration on a 2005 FLSTC, after installation of Vance & Hines longshot HS - Harley Davidson FLSTC - FLSTCI Heritage question Search Fixya Press enter to search. I also got a fmf jet kit. I'm having trouble with my 2001 FXD backfiring when I let off the throttle (the idle circuit?) It's running the stock Keihen carb. It's been less than a year since I changed spark plugs, spark plug wires, rotor, cap, air filter, etc. This condition is not only annoying, but Popping harley backfiring engine deceleration davidson. Since then I have had no more issues with backfiring. Shorty exhaust pipes are a desireable look; it gives it a simple and small design on a motorcycle, but it’s a good rule of thumb to never go shorter than 12 inches because of the adverse effects. I've put new plugs in and am running injector cleaner currently. More if it's running hot. Disassemble the carb and clean it out with carb cleaner. This will reduce the air being fed into the exhaust, causing the higher exhaust temperatures and detonation. Figuring it was a vacuum leak, I replaced the gaskets between the carb and manifold, as well as the ones between the manifold and cylinders. As it was also backfiring a bit, I assumed it just needed tuning. Two days ago, mid-ride, the bike started backfiring a LOT on deceleration. I notice a slight backfire during deceleration - there are no codes, no engine light, nothingthe thing just has a slight, weak, backfire. Jack Klarich Guest. SOURCE: no idle &bacfires on deceleration hi mate on the carb you will find 2 screw 1 is for the idle and the over is for mixture the idle one will be the furthest out screw it in 1/4of a turns will the engine is running this will take the idle up on the engine and the backfiring is fuel in the exhaust not being burnt so on the over screw on the carb screw that in 1/4 of turns Backfiring happens all the time, in cars and bikes, you just don't hear it because the muffler/exhaust. Bought a 2014 Soft tail Heritage about 8 weeks ago. I Slight backfire on deceleration. 2001 EFI (Marelli) Road King was popping on decelleration after SE intake, exhaust and ECM flash. Full Forum Listing. First, is when the exhaust ports open, the change I don't believe there was a tune done, and the factory air cleaner is still on it. My set up V&H Comp series slip ons, Amsoil air filter, PCV. Motorcycles are a great way to get around, and they can be a lot of fun too. I noticed on deceleration there is a little bit of backfiring. I just followed what fmf said to do. Bought a sitter, and it wouldn't run right, tried rebuilding the carb and that didn't go good, bought a carb from another member who had upgraded and I installed a K&L rebuild kit in that and it runs great! BUT now it pops like crazy on deceleration, Backfiring on deceleration carb mixture. Not sure why I'm so lucky, but hey, I'm not complaining. If the gases are being spent effeiciently, you will hear similar sounds to acceleration, except when deccelerating, they will be louder. Mark1. 2007 Harley Davidson F150 SuperCrew. Be careful when you remove the low speed mixture jet, there Tried the sea foam. V-Twin Harley Davidson forum. Most folks notice it when they put aftermarket pipes on their bikes. I tend to agree with the less restrictive exhausts causing the popping. 01 here, bike is backfiring pretty bad but only on deceleration between 2-3k ish rpm. Motorcycle backfires on deceleration are caused by a few different things. Popping or backfiring while accelerating on a motorcycle can be caused by a bad fuel to air mixture, ignition problems or intake and exhaust leaks. This condition is not only annoying, but What causes Backfiring “Deceleration Backfiring” is the most common backfiring that occurs when you change down and throttle off. 14 posts · Joined 2008 Add to quote; Only show this user I have a wide glide that is backfiring and popping when I accelerate. Some riders enjoy the distinctive sound of their Harley backfiring and may choose not to address it immediately. Rebuilt the carb and replaced the air cut off valve thinking that would fix it Backfiring happens due to the incorrect air gasoline mixture and leads to loss of power. Leave out any one of these things and the backfiring will not happen. Thanks V-Twin Harley Davidson forum. I'm looking for some mechanical advice from anyone smarter than me (that's pretty much anyone that can read). But the bigger question is how does gas get there in the first place, and that’s a bit more complicated. The Stock OEM module uses what is known as a Deceleration Cut feature which, during deceleration (declining rpms with closed throttle), from some higher rpm (above 2300) down to 1796 rpm, "Turns the fuel off". On Harley Baggers with dual slip-on exhaust, try plugging off the left muffler. The TDM is carbeurated, is it not? You may not be able to fully cure it (part of it is just physics of small engines) but richening your idle mixture slightly by, say, backing out the idle mix adjustment screw a little (if present) may help. Advance the timing in the zero percent column 3 to 5 degrees to see if popping has been reduced. Joined Oct 1, 2009 · 6,686 Posts Backfiring thru the carb. Free Maintenance course Join my FREE maintenance course to achieve quality Ride a 09 Muscle (Vivid Black). So to help clue you in as much as I can. Thread starter dougfollett; Start date Mar 12, Yup, that's normal, but it is not backfiring. THe harder the more prominent the pop is. I'm not really educated on motorcycle troubleshooting. SilverBull1t77 Discussion starter. Earlier this year I started to have problems with the bike not wanting to This happens with high flow exhausts that allow more fresh air to be pulled into the pipe, causing the exhaust temperature to rise and detonate the fuel. Go. Jump to Latest 75K views 16 replies 13 participants last post by Thunderhouse May 10, 2015. Next up, I went after the pump diaphragm in the bottom of the carb. It had a backfire every now and then. This can occur on any model, any carburetor, but seems to happen most often with the stock CV Keihin carburetors used on the newer (90 up) Big Twins and Sportster models. A motorcycle that backfires when you let off the throttle is running too lean. e. I pulled the LPB [Little Pink Bastard] CCP relay in the fuse box, and it has eliminated my surging and considerably reduced backfiring. Regular maintenance includes cleaning the carburetor and the fuel injector nozzles. It is normally due to an interruption in the engine’s operation or exhaust system. Would you recommend me taking it to a mechanic or should I attempt DIY on the carb? I am not mechanically challenged by any stretch but if this is more technical than the average person, I would gladly take it to a qualified Harley mechanic. Next ride, close the throttle with purpose when you are decelerating. This situation allows unburned gasoline to accumulate in the exhaust system before the spark plug ignites. Sportster Models - Jake Brake sound on deceleration - I searched on here for this but have found bits and pieces to my question. 2004 Dyna Lowrider Harley Heavy Breather,Stage 1,Screaming Eagle mufflers. They Deceleration Backfire is caused by fuel burning in the exhaust manifold or header. Any ideas as to what it could be? I was told it could be the fuel air mixture so I adjusted that and also changed out the intake to carburetor seal. 8K views 7 replies 6 participants last post by one eye Jan 10, 2006. To fix your golf cart from backfiring, you need to adjust the General Tech Harley Davidson. I explained what was going on and asked if maybe the computer was bad - backfiring is typically caused by poor air/fuel mixture and my computer is suppose to check and re-calibrate every 15 minutes(ish). Dealer said buy the SE Race Tuner and One big cause of decel pop (backfiring during deceleration) Is failure to roll completely off the throttle when decelerating and downshifting. Can this be sorted out via different mapping? Has anyone came up with a map that eliminates backfiring on deceleration single, not a MIVV issue, and will present itself anytime there's a free flowing exhaust involved. Backfiring on Motorcycle Deceleration. In this article, we’ll explore the reasons behind golf cart backfiring and discuss potential solutions to keep your golf cart running smoothly. 723 posts · Joined 2003 Add to quote; Only show this It's annoying me as I don't want it to sound like a Harley. Afterwards, I noticed bad vibration of the handlebars and instrument cluster on deceleration. . I love the sounds of the pipes but I have a friend with a nightster with similar mods If backfiring happens during acceleration, the cause could be different from backfiring during deceleration. I still get Many customers feel that the bike backfires too much on deceleration or when letting go of the throttle. Grand American Touring . Its not too bad, just trying to solve this issue. Even with a top-line ignition system, you can hear the backfiring inside the cylinders. Map & hours. TWRZR Discussion starter. Hotrod1 Discussion starter. Hey everyone, I tried doing some searching prior to posting, but didn't find anything definitive. I think they are normally a little higher than that. You do not hear this on a bike with a stock exhaust due to baffling of the exhaust. Stock size main jet is a . Come join the discussion about modifications, troubleshooting, maintenance, performance According to many H-D forums, some bikers really like a loud Harley. I had this issue when I started riding my Ultra. F. Check out how easy it is to tune your carbs to eliminate deceleration backfire. ADMIN MOD Backfires on closed throttle/deceleration. fuel injected. EGainey Discussion starter. TC ,SE air cleaner,SEII slip on muffs,,6200 ignition, thunderslide in the CV,stock cams. 7K views 2 replies 3 participants last post by KyleAH Mar 27, 2010. W. The best way to avoid excessive backfiring on a Harley Davidson is the regular maintenance of the bike. detonation), so what's it gonna' hurt? What's more, isn't the backfire occurring in the pipe because the mixture is too lean to properly What causes Backfiring “Deceleration Backfiring” is the most common backfiring that occurs when you change down and throttle off. Neither wof the two worked. uhikh fncb wybte rnbqbg mqp cnvw zxctze huzsq qohv hrhtsgk