Motorcycle Sputtering And Backfires

The magazine recently purchased a 2000 Honda XR650R motorcycle with less than 1000 original miles on the bike. After cleaning The bike ran great with no sputter , no backfire, very quick and easy start. An engine backfire happens when fuel emerges from the engine, and bursts into flame. by Contributor Riding your motorcycle in the open air is a thrill for motorcycle enthusiasts. If you accept your trim 5 times you could end up with a 120% trim change from the base map you started from. My ATV will do it for maybe 15 to 30 minutes and then not do it for several hours. Another cause for motorcycle backfires is a bad fuel pump. my club car uses a fe290 kawasaki engine with a keihin carb starts and runs fine. 4: Backfires in Exhaust Note: It is normal for many high performance exhaust systems to moderately backfire or pop when the throttle is closed from mid-to-high rpm. When an engine is running rich, there is more fuel present than there is air. But if the transmission "sputters. How many of you guys who are having this issue have that bypassed?. Backfire is a condition described as a loud bang, poof, explosion, etc. Pull in Clutch and Give a quick shot of throttle to match engine speeds with rear wheel but instead it backfires / sputters once in a while when doing this. This is a discussion on Please Help!! '72 CB350 backfiring from right carb within the Technical forums, part of the Caferacer. Lately as I drive and the car shifts thru all gears when it comes to 5th it starts "bucking/Jumping " and hesitates however, once past 60mph its smooth again. Other causes of backfire are bad or weak fuel pumps, low fuel pressure and clogged fuel filters. I adjusted the carb yesterday and it only did this a couple of times. Have a similar issue with my 1300 with the stock pipes. A basic internal combustion engine needs three things in order to function; Air, Fuel and Spark. NET - Kawasaki Ninja ZX-9R ZX9R ZX9. Motorcycle Club » Star 1100 Classic & Custom. I have a 1995 Honda Shadow 1100 C2. sometimes its stays a while trying to idle. I just took it out for a drive. Backfire out of pipes. I'm new to motorcycling and new to this list. Boyer electrics, connections look solid, good spark. It will backfire/sputter through the exhaust every 10 seconds or so, sometimes enough to kill the engine. went to pull away from the gas station, big sputter & backfire, and complete power loss. How old was the gas in the tank you topped off? Sure good chance the non-ethanol you topped off with was contaminated with water from the station running the underground tank too low before refill or you got there shortly after they did and and the storage tank hasn't had time for the stirred up water/crud to settle back to the bottom. Manual Rns 510; Marine Engineering Pressure Burner Carrier Drawing Answers; Chinese 110cc Engine Diagrams; art praxis 5134 study guide; Toro Owners Manual. I just unearthed it for winter, but prior to the season, I changed the oil, took out the plugs (actually replaced them and gapped the new ones appropriately), added a bit of oil to each of the plug holes before sealing them, and charged the battery with my trickle charger. Water in the fuel can do funny stuff too. (each image has a large view). I am now on my fourth motorcycle, and my top recommendation to beginners is the VLX. Flowmaster continues to expand their awesome line of bolt on performance exhaust with new FlowFX axle-back systems! Introducing three new systems, Flowmaster now covers most 2005-2014 Mustang models utilizing the FlowFx "straight-through" performance muffler for a deep, powerful tone. Download Backfire sounds 4,899 stock sound clips starting at $2. 90 sputters and backfires Heat issue? I have a '05 predator 90 and since buying it last summer, I have had to replace a fouled plug about every half hour of ride time. And worse, many claims of lean conditions and rich conditions are contradictory. Texas Offroad Network Forums » Forums » Maintenance and Hot Mods » Dirtbike Maintenance - Advice, Addons, Mods, and Smart Tips » yz 450 rough idle and backfire on decel Register User Portal Page Forum List Calendar Active Topics Search Who's Online FAQ. We Welcome Indian Motorcycle Owners, Enthusiasts, Vendors & Dealers. Atv sputters when accelerating keyword after analyzing the system lists the list of keywords related and the list of websites with related content, in addition you can see which keywords most interested customers on the this website. What causes backfire on my honda spirit? I was working on motorcycle shop before. - - 91 King Quad 300 sputters and backfires It backfires a lot and runs hot symptoms of being too lean. 98 pw80 stutters and won't rev up. I've got a '96 gs500 with about 12000 miles that I got back in December for about $950. A Kawasaki lawnmower engine that backfires on start-up has a problem with fuel delivery through the idle jet. Water in the fuel can do funny stuff too. Find the Cobra Fi2000R O2 Fuel Processor - 692-1616CL at Dennis Kirk. 98 pw80 stutters and won't rev up. Jack Phelps' Pages : A. Afterfire occurs after the engine has been shut off. Problem CONDITION POSSIBLE CAUSE CORRECTION 5) Ford& Holley Only. A basic internal combustion engine needs three things in order to function; Air, Fuel and Spark. I took the parking brake off my 2002 Yamaha warrior 350 to put a e brake block off on the back, I took everything off of the lever except one wire, and I went to go start it up and ride it a couple hours later and it started up and idle perfect I went to give it gas and it started sputtering. Even though it still runs hard on top I guess that could be the problem, I'll try a bigger one, and see if that helps. We Welcome Indian Motorcycle Owners, Enthusiasts, Vendors & Dealers. I'm cruising along at 60mph today and bam, starts stuttering again. I have cleaned out the left side carb which seemed to be the issue (leaky fuel, seemed like flooding). If your vehicle is complaining loudly at the rear, you likely do not have a problem with your exhaust system, but rather with the engine tuning itself. I've had for delivery problems on my motorcycle before and it presented when I tried to go fast. Unburned air and fuel pumped into the exhaust will often be ignited by the other cylinders still burning exhaust gases. Had that changed and car was running fine. I started noticing the problem after I took off the headers and exhaust to repaint. Won't rev out. backfiring, spitting and sputtering "2" I'm having the same problems that Hedlocust had a couple of days back, except that mine started during a heavy rain. I have some performance parts listed below and when I am going slow in bumper to bumper traffic (not the only time but most often) I will pull in my clutch to down shift and the bike will pop/spit/backfire from the intake. bike sputters and backfires after going over bumps SV650 Gen1 (99-02) Tech Suzuki SV650 Forum: SV650, SV1000, Gladius Forums > Workshop > SV650 Gen1 (99-02. FMF's instructions tells me that I have to have 62 pilot and a 162 main jet and the needle at 3rd clip. Then it started returning within two days and went back too how it was, long start and backfire when releasing throttle but not loud but consistent after another kind of like a growl. You might scan for 'pending' codes after the next time it happens. Real backfiring means the engine is not properly timed and the fuel/air mix is getting a spark and ignition at the wrong time (when the intake valve is open). I just unearthed it for winter, but prior to the season, I changed the oil, took out the plugs (actually replaced them and gapped the new ones appropriately), added a bit of oil to each of the plug holes before sealing them, and charged the battery with my trickle charger. Stage 2 Cams Backfiring From The Air Cleaner Thunder Stroke 111 the AC would "Burp" and. Best Answer: I don't know about the timing, but backfiring and hesitation is a classic sign of the carb mix not being right: It's running too rich. I did the Caddman/woody(me) everything was going great! now the bike seems to smell rich and it sputters under load, uphill, putting a women on the back i have a 680 resistor in it, tried to go lower, FI light came on, went back to a new 680, same result,, Air temp sensor bad? or do need a techlusion, cobra?. When Ihit the high end of each gear the bike wants tospit and sputter then occasionally. Q:I recently purchased a new '97 Kawasaki Vulcan 750, which now has a little over 1,000 miles on it. does anybody know what this could be. The plug wires seem to be where they should be, I moved them up and back one spot and nothing. It doesn't run despite having a good spark, if I turn it over with a drill I get occasional backfiring, it is definately backfiring as the drill jerks and slows when it goes pop. The mighty Harley is slowly loosing its carburetor. I had the Hindle muffler put on by the dealer and it seems the hotter the bike gets the more it backfires. my 91 katana, 600 backfires @ 6100 rpms or 80 mph. I have a Vulcan 500 that last week got stuck in a huge rainstorm in stop and go traffic on the highway. it's been backfiring / sputtering and bogging down when i try to accelerate quickly. Today while i was driving when I got to a stop sign I pushed the gas and the car started SPUTTERING horribly as if it was a subaru making the car jerk and almost as if it was backfiring the turbo somehow. This is both frustrating and very embarrassing. What causes backfire on my honda spirit? I was working on motorcycle shop before. Zzr600 low rpm sputtering/no power Hello, I got stuck in a downpour on my way back from work a week ago and now the bike is running poorly. -Our stage 2 map for a free flowing intake and exhaust. When Ihit the high end of each gear the bike wants tospit and sputter then occasionally. i was riding in congested traffic one day and being an air cooled motorcycle it was running a little warm. or you need to adjust the valves, i dont think that would have anything to do with back fireing but maybe with it slowing down, stage three of the clutch may be gone, which then you would need to get a stage 3 hot cam or a new. The engine starts, runs about 3 minutes and then starts stumbling, backfiring, and eventually will stall out. 2002 Vstar sputtering and backfiring Thought I may have been out of gas, but when I switched to my aux tank, the same thing. I'm a new motorcycle owner and am having a problem that I can't figure out. General Discussion - Sputtering on deceleration normal? - Hi all, So I've had my SH about a month and a half now and after sorting out a few issues. Deceleration back-fire, rough idle, and throttle lag can be quickly adjusted by tuning your carburetor. It was like my bike ate a bad burrito full of beans, backfired terrible until I was able to get a can of SeaFoam and pour half a can of it into the tank with the bad gas. backfire hello there, i may not have the exact problem, but similar. Get a small piece of copper wire that will fit through the jet and make sure you don't have blockage. If you accept your trim 5 times you could end up with a 120% trim change from the base map you started from. Have an experienced technician look over the vehicle, verify the work and track the source of your vehicle’s sputtering. Boat runs great until after about 1 hr when it starts to sputter and spit. Tuning your Harley Davidson carburetor is simpler than most think and can be performed with a few common tools. Motorcycle parts Tip: Often sputtering is a lack of fuel but a spark plug reading should tell. Hello, I am having and issue with my 7 month old Vintage. Motorcycle Club » Star 1100 Classic & Custom. I've got a '96 gs500 with about 12000 miles that I got back in December for about $950. 9000miles on bike. Sounds to me like it's misfiring part of the time, and the resultant unburned fuel being passed is later igniting downstream, in the exhaust system - causing the "sloppy, farty" sound, backfiring and red-hot exhaust pipe. Recentlythe bike was getting harder to start ,and on a ride the bike started sputtering when throttled and eventually started to backfire. I've had for delivery problems on my motorcycle before and it presented when I tried to go fast. started it and even rode during the mild winter. The RZR570 runs a bit on the lean side from the factory and can have some backfiring under decel. Backfiring caused by internal carburetor problems is a result of a defective accelerator pump. Vulcan Pops. Any more help guys? start and backfiring. The backfires are mainly caused (in a normally functioning 4 stroke engine) by leftover fuel that was not burned (combust) inside the cylinder and goes out through the exhaust valve. I have an off road buggy, will start and idle fine and rev normal in neutral but when I go to drive it over say a 100 metre straight at full throttle it be ok generally on the first rin but second run it'll splutter and backfire and will stall when I go to brake, and wont start straight away, I think its flooding itself and getting too much fuel. hope you can hit the road sooner with a smooth run. Just got the bike not too long ago and im currently going through it to right some issues. Things were looking up: I replaced the spark plug, cleaned out the exhaust, adjusted the idle / fuel screws, and even replaced the brakes (I can stop now!). Due to a couple symptoms you listed i. Atv sputters when accelerating keyword after analyzing the system lists the list of keywords related and the list of websites with related content, in addition you can see which keywords most interested customers on the this website. I did my valves, messed around with ignition, then finally bought a new carb and it is a new machine. Hope the cam - valves do the trick for you. Conclusion. my 91 katana, 600 backfires @ 6100 rpms or 80 mph. I decide to drive it up a private road to "explore". Please advise me on what the real symptoms of lean vs rich system is. The backfiring of the motorcycle is a signal that something isn't quite right. This is when air is being pulled into the intake where it is not supposed to enter. The last 3-4 km driving across the lake to a friends camp, it got to the point where I could only maintain approx. V star 1100 classic bogging down and backfiring and ride slowly so that the bike sputters, bogs and /or bucks. The correct firing order is necessary for a smooth-running engine. I THINK you have a larger 'cap' on your fuel pump with a sort-of strainer/filter in side. Power valve blown. My ATV will do it for maybe 15 to 30 minutes and then not do it for several hours. If I try to give it the gas, it does the same thing but only more. Hi, I've been dealing with an annoying problem for months, and the latest condition does not throw a CEL so we're not sure what to do. If your vehicle is complaining loudly at the rear, you likely do not have a problem with your exhaust system, but rather with the engine tuning itself. Fresh plus. g-27, yes, click-tick. On my 1960 R50, when I hit higher rpms, or try to hit about 110/120kpm, the gas really sputters or just misses. Conclusion. Please advise me on what the real symptoms of lean vs rich system is. I got long Tors fitted on my 2011 America, it's been back to the dealer twice for tightening up & remapping, it still backfires. That seems to be the sweet spot, 1/4 turn in either direction doesn't make much difference. The most common causes for backfiring during acceleration include an incorrect fuel-to-air ratio, a faulty ignition and bad wiring. 12k miles on it. My first guess was bad gas and tried some different gas sputter and backfire when cold - Triumph Forum: Triumph Rat Motorcycle Forums. 2 kicks with the kick starter. My Kawasaki FS481v starts perfect (half pull) seems just fine when I first start. When Ihit the high end of each gear the bike wants tospit and sputter then occasionally. Motorcycle Pictures By Model. It run fairly good. OK, the number TWO cause of backfire is a leak in the exhaust gaskets, generally at the junction of the cylinder and pipe, but can also be caused by a leak where the pipe meets the muffler Gaskets are only a couple of bucks a piece, so if you're backfiring due to a damaged or missing one, it's best just to replace them both. why would my exhaust manifold be glowing red hot? - I have to agree with both points Clogged cat Plus an additional reason they got clogged, to much fuel aka Rich, if it's Immediate running rough it's not the O2's they don't turn on till operating temp and since headers and manifolds rarely ever clog loosen your pre cat bolts spread the pipe 1/4 inch or so and see if there is an. This is common. It does it about 10% of the time when I am downshifting and Rev-Matching. This simple procedure is a great Harley tech tip that applies to all Harley carbs from 1989 to present that use the CV style Harley Davidson carburetor. As I start it now I don't get anything. I took my car to the shop, and this is what was done. moisture? ethanol? plugs/wires/coil seem fine. A backfire results in a temporary loss of power and forward motion along with a loud popping noise. You are not logged in. Please advise me on what the real symptoms of lean vs rich system is. In my life when a fuel filter is compromised, it makes the engine backfire, stall, sputter, and is inconsistent. Hello, I am having and issue with my 7 month old Vintage. Then parked the bike in the sun (~35C) for a few hours. At first I thought it was because I ran it to empty. V star 1100 classic bogging down and backfiring and ride slowly so that the bike sputters, bogs and /or bucks. When a motorcycle engine has an emission system malfunction, such as an exhaust leak or a moment of running rich or running lean, backfire occurs as a result. In the low end it would sputter backfire and want to die until it was revved up then it seemed to be ok. Why is the engine bogging under acceleration? I recently managed to get the moped running properly, albeit for only a short time. One thing a lot of motorcycle owners don't realize is that there was probably decel popping with the OEM exhaust, but due to the restrictive baffling of stock exhaust systems you never heard it. Bike sputters in lower gears, then exhaust pops After getting some help with my revving issue , I took my bike out for a test run and I notice that in my lower gears (1 and 2, sometimes 3) my bike will sputter for a bit, but not like the kind of sputter when there isn't enough throttle. When I got to the top and hit level ground the bike started sputtering and backfiring, acting like it was going to shut off. A backfire is a sign that your car isn't running efficiently and needs to be addressed in short order. 0 will occasionally pop or sputter (misfire)and loses power for no reason? And then it will suddenly"catch" and accelerate. i have a susuki lt250r 4 wheeler and it was running good and all of a sudden it started backfiring and sputtering when you try to give it a lot of throttle. It has less then 3000 miles on it and ran super until this recent sputtering and backfiring episode. KZ 1100 backfires and sputters 20 May 2013 22:32 on page 37 of my 1978 kz650 Kawasaki Motorcycle service manual it has a dot in the column calling for the use of. How many of you guys who are having this issue have that bypassed?. Next up is adjustment of the carb, lets see 2007 think that is when they decided a 185 main jet would help with the epa so they put it in and made it way leaner, so you have a choice or two you can do the scar mod or you can get a factory pro jet kit and set the. It sounds a bit like its bouncing off the rev-limiter. 2008 victory backfires, 2008 victory vegas 8 ball spark plugs, bike backfirs with pinging sound, bike is backfiring and smells like gas, clean carb 2007 victory 8 ball, if my motorcycle is backfiring not running good what could be a ball, spark plug for a 2004 victory kingpin, sputtering and backfiring on a2004 arlen ness victory vegas motorcycle,. So I changed the main jet to170 and moved the needle to the fourth slot from the top. Fire the motorcycle up and take it for a ride. Download and buy high quality Backfire sound effects. What is happening is; when you shut the ignition off, something, somehow is causing a couple of the cylinders to keep igniting, which in turn keeps the engine running, although "sputtering" pretty badly. I did my valves, messed around with ignition, then finally bought a new carb and it is a new machine. that seems to have a vapor lock upon acceleration it sputters and backfires?. If you have this problem with your truck engine, or you find that it sputters or fires fuel into the air, then you may have to troubleshoot the engine in order to work out the cause of your backfire. Honda Goldwing Forums > Goldwing Motorcycle Discussion Forums > Honda Goldwing Forum General Discussion > GL1100 sputtering Reply. Backfiring, sputtering and stuttering is usually a sign of something that needs to be adjusted or repaired under the hood, not in your exhaust tubing or muffler. Many customers also report a slight increase in engine braking when going downhill. its ok under 80mph, but i cant over that. I did my valves, messed around with ignition, then finally bought a new carb and it is a new machine. it will idle. A Harley-Davidson motorcycle engine may sputter and hesitate when a crank position sensor (CKP) starts to fail. It wouldn't start and it kept turning over and then finally started for a bit, but was really rough whenever i pressed on the gas, then when i let off it died. We usually refer to an exhaust backfire as a "backfire", and backfiring through the carb as "spitting" or "coughing". OK, the number TWO cause of backfire is a leak in the exhaust gaskets, generally at the junction of the cylinder and pipe, but can also be caused by a leak where the pipe meets the muffler Gaskets are only a couple of bucks a piece, so if you're backfiring due to a damaged or missing one, it's best just to replace them both. 9000miles on bike. I had a really big backfire getting on the freeway one day and it hasn't really been rideable since. Alot of people are knowledgeable about their particular field but few can translate that to us novices successfully,cheers mate. The when I go to start it, it backfires / cranks but will not start. The bike runs great for the most part but sometimes at start up it will blow back through the carb on the num. An engine backfire is an explosion produced by an internal combustion engine. Just sputters and dies. Download and buy high quality Backfire sound effects. I have tried to recall the circumstance at each occurance, and I think it happens more when fuel tank is 1/4 or less. Engine sputtering and backfiring. The area should be checked for any hoses that may have been bumped loose, allowing a vacuum leak. Whem I come to a stop, the bike runs very rough and starts to spit and sputter and eventually stalls. Motorcycle Pictures By Model. Due to a couple symptoms you listed i. It sputters and quickly dies. After it starts to get warm it starts to sputter and has a little backfiring. Bike has andrews ev46, mikuni 42mm, sampson big guns. I am now on my fourth motorcycle, and my top recommendation to beginners is the VLX. I have noticed, however, that after riding the bike around for ~10 minutes (this is what I noticed on my commute) when I am at a low throttle level in first gear that the bike stutters and jumps forward a little bit. This mainly happens when it's idling, or when I'm slowing down to downshift with the clutch in. In my life when a fuel filter is compromised, it makes the engine backfire, stall, sputter, and is inconsistent. The fuel/air getting to the cylinder(s) has too much gasoline in it. I just got a 05 trx450r and it backfires on deceleration after a 1/4 -1/2 or more throttle usage. It was running perfect, never had a problem with this car. In fact, one should expect a well-tuned high performance engine to "pop" and "crackle" when the throttle is closed at high rpm. I have tried to recall the circumstance at each occurance, and I think it happens more when fuel tank is 1/4 or less. Something i noticed is that i can rev it above 4k rpms in park w/o it sputtering, but when i drive it whenever i accelerate it sputters. Flowmaster continues to expand their awesome line of bolt on performance exhaust with new FlowFX axle-back systems! Introducing three new systems, Flowmaster now covers most 2005-2014 Mustang models utilizing the FlowFx "straight-through" performance muffler for a deep, powerful tone. Smoke coming from a motorcycle exhaust indicates the engine is not running correctly. Sometimes it also will do this while riding, i can hear it when it happens and then sometimes ill get a backfire soon after. It doesn't run despite having a good spark, if I turn it over with a drill I get occasional backfiring, it is definately backfiring as the drill jerks and slows when it goes pop. So far I've checked the battery connections and cleaned the terminals. I wouldn't even consider this a problem, but I just want to find out why and perhaps do some preventive maintenance. I have removed and cleaned all jets in the carb, put in a new piston and honed the bore, it has good compression, new correct specification spark plug. When I got to the top and hit level ground the bike started sputtering and backfiring, acting like it was going to shut off. I suspect it's a backfire through the throttle bodies that snaps the throttle butterfly open or closed. I just unearthed it for winter, but prior to the season, I changed the oil, took out the plugs (actually replaced them and gapped the new ones appropriately), added a bit of oil to each of the plug holes before sealing them, and charged the battery with my trickle charger. A friend of mines bike has been popping alot while he rides. Too much fuel is delivered, resulting in unburned fuel in the exhaust. Motorcycle Classifieds spit, sputter, backfire, jumpy tachHELP! yesterday i tried to start my car and it kept turning over, and finally it started to run. The problem list below will give you an idea of what causes could be generating this condition. Note: Backfire and afterfire through the carburetor will not harm the engine at all! Find out the most common causes and possible fixes for engine backfire and afterfire. 1999 Husky WR 125. Went back to garage and fixed that. This site is an archive only website. How to solve engine hesitation and stumble problems on the 90+ By Steve Chong. Completely random backfire through throttle body. I have to keep turning the bike off, waiting, and sometimes can baby it back if I keep the rpms at just the right amount. Fire the motorcycle up and take it for a ride. Ducati Motorcycle Forums. I sputtered and backfired around the block to the house never getting over 3 mph, never get any rpm up, just bump along and not trying to stall. I decide to drive it up a private road to "explore". Find the Cobra Fi2000R O2 Fuel Processor - 692-1616CL at Dennis Kirk. Bike sputters in lower gears, then exhaust pops After getting some help with my revving issue , I took my bike out for a test run and I notice that in my lower gears (1 and 2, sometimes 3) my bike will sputter for a bit, but not like the kind of sputter when there isn't enough throttle. How old was the gas in the tank you topped off? Sure good chance the non-ethanol you topped off with was contaminated with water from the station running the underground tank too low before refill or you got there shortly after they did and and the storage tank hasn't had time for the stirred up water/crud to settle back to the bottom. Total Motorcycle Talk Forums ↳ Start Your Engines - Introduce Yourself ↳ Total Motorcycle Talk ↳ Total Motorcycle Cool Wall ↳ Beginning Bikers ↳ The Ladies Lounge; News, Events and Stories ↳ Daily Motorcycle News ↳ Member Motorcycle Blogs ↳ Local - Motorcycle Rides, Events and Rallies ↳ New Motorcycle Models and Rumor Mill. The battery must have been weak to begin with. Typical problems include fuel not being completely burned, too much oil or coolant evaporating. The RZR570 runs a bit on the lean side from the factory and can have some backfiring under decel. Some motorcycle guys would try to replace all spark plugs and I’m sure their backfire would remain the same. I had a similar issue right after installing my clutch cable, I had lifted the tank some to get access. Technical Discussion - Sputtering issues - Hello, I started the bike after about 2 weeks of not starting it. Had that changed and car was running fine. Flowmaster continues to expand their awesome line of bolt on performance exhaust with new FlowFX axle-back systems! Introducing three new systems, Flowmaster now covers most 2005-2014 Mustang models utilizing the FlowFx "straight-through" performance muffler for a deep, powerful tone. The backfires are mainly caused (in a normally functioning 4 stroke engine) by leftover fuel that was not burned (combust) inside the cylinder and goes out through the exhaust valve. Real backfiring means the engine is not properly timed and the fuel/air mix is getting a spark and ignition at the wrong time (when the intake valve is open). The CV carb is dependent upon vacuum to function properly. popping, spitting and backfiring This is a discussion about popping, spitting and backfiring within the 1000's section, where you will 1 Liter Bike Talk for Suzuki, Kawasaki, Honda, Yamaha; hey guys I got and 04 gsxr 1000. But i only changed the fuel petcock because it finally crapped out on me and my bike wouldn't stay running anymore. In my how-to video I will walk you through the basic principles and fundamentals of what you are adjusting and how it will impact your bike's response. i was riding in congested traffic one day and being an air cooled motorcycle it was running a little warm. This mainly happens when it's idling, or when I'm slowing down to downshift with the clutch in. I saw you used a new carb, but are you tightened down on a new gasket to specs? And are you jetted correctly with the new carb? Are you sure you are backfiring is another question. why would my exhaust manifold be glowing red hot? - I have to agree with both points Clogged cat Plus an additional reason they got clogged, to much fuel aka Rich, if it's Immediate running rough it's not the O2's they don't turn on till operating temp and since headers and manifolds rarely ever clog loosen your pre cat bolts spread the pipe 1/4 inch or so and see if there is an. One thing a lot of motorcycle owners don't realize is that there was probably decel popping with the OEM exhaust, but due to the restrictive baffling of stock exhaust systems you never heard it. It starts strong every time and ran fine, and for $950 I figured it would be a great starter bike both for riding and working on (doesn't bother me if it's obviously been down a. upon further inspection of the bike, he discovered that the fuel connector was fractured. I noticed a slight sputter as I hit the highway for the ride home from work (the bike always runs like a top so a slight sputter was very noticeable) and when I stopped for an accident that had to be cleared, I turned it off and then it would not fire at all when it was time to leave. I looked at temp gauge thinking it was over. The use of precise holes to deliver a burnable fuel is similar to the motorcycle carburetor, thus the name. Changed both o2 sensors ( I had a check engine light) 2. motorcycle going really fast and stopping. I was able to ride 10 miles to home, but sputtering and popping all the way. When an engine is running rich, there is more fuel present than air, according to DoItYourself. u can hear it sputtering /missing at WOT. Harley-Davidson Fuel Injection basics It is a sad day in Hogville. The 31PICT/3 carburetor you have is usually jetted rather lean (a lot of VW carburetors after 1970 were jetted lean by VW) and so you may find a simple rejetting will resolve your backfiring problem (see below). The day was relatively 30-40% humidity and 60 degrees. Total Motorcycle Talk Forums ↳ Start Your Engines - Introduce Yourself ↳ Total Motorcycle Talk ↳ Total Motorcycle Cool Wall ↳ Beginning Bikers ↳ The Ladies Lounge; News, Events and Stories ↳ Daily Motorcycle News ↳ Member Motorcycle Blogs ↳ Local - Motorcycle Rides, Events and Rallies ↳ New Motorcycle Models and Rumor Mill. It sounds a bit like its bouncing off the rev-limiter. I have to keep turning the bike off, waiting, and sometimes can baby it back if I keep the rpms at just the right amount. My unscientific test includes twisting the throttle at different levels from 25% to. Trouble in starting the engine is the most common situation faced by car owners, if the fuel filter is clogged, as there is little or no supply of fuel to the engine. When I checked my manual that are the stock settings. It doesn't run despite having a good spark, if I turn it over with a drill I get occasional backfiring, it is definately backfiring as the drill jerks and slows when it goes pop. went to pull away from the gas station, big sputter & backfire, and complete power loss. If you try to accelerate more it backfires a few times and then takes off like there's nothing wrong. Bike won't start - just backfires occasionally. Questions to ask yourself! i. Really amazing. 1984 XV1000 backfires and sputters. But most forget that they will have to re-tune their motorcycles to avoid exhaust popping, spitting and backfiring. Low speeds in gears 1-4 are just horrible. They instantly jump to asking if I've changed parts or what I did. If ignored, such problems can result in significant engine damage, and being able to identify the origin of the smoke, as quickly as. This is where it could get tricky and most people lose their love for rejetting. 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. Hey, my Sr50r started sputtering, backfiring, having trouble starting and won't accelerate as the rpm won't reach high enough before sputtering. I took it to the Victory dealer nearby and they tried to fixed it. sometimes its stays a while trying to idle. 1: Ride the motorcycle w/my 100lb wife on the back 2: Ride far away from home (at least for 1 hour) 3: Sometimes (cant always replicate it) -- The bike will start to sputter, backfire, and stall. bmc race filter pair block off plates tre drag. My air compressor is a great tool, but its ability to shoot out seats, springs, and jets is unprecedented. It runs great, except for one problem. I hope the backfiring didn't damage anything, it only happened twice and it wasn't very big. any thoughts? it sat in the garage all winter with a full tank of gas. 71 Commando 750. What I'm hearing is the sputtering (seem to be better word for what i'm experiencing than backfiring) When i'm engine breaking from high rpms say coming down from 12k. -Our stage 2 map for a free flowing intake and exhaust. 2) Check that the Needle Jet (nozzle) is installed correctly. Just got the bike not too long ago and im currently going through it to right some issues. Now the spark is all good but it is sputtering in the mid-high range. All of sudden when trying to press down on the accelerator to give it gashere comes the sputtering and missing. Recent Posts. Well when I went to fire her up this weekend It was a little tough. Unburned air and fuel pumped into the exhaust will often be ignited by the other cylinders still burning exhaust gases. Performing maintenance on your scooter will make your warranty null and void. 4: Backfires in Exhaust Note: It is normal for many high performance exhaust systems to moderately backfire or pop when the throttle is closed from mid-to-high rpm. Well once I got her goin there was alot of hesitation from a dead stop or when I shifted (lower rpms). It run fairly good. it will idle. I wouldn't even consider this a problem, but I just want to find out why and perhaps do some preventive maintenance.