Motorcycle Running Rough And Backfiring

If poor engine running presists check the connection of the carb to the rubber sleeve on the engine. The engine would run on the generator/alternator at higher speeds but would run rough, backfire or kill when the voltage dropped off at lower rpms. Hi guys, I've been doing a lot of reading from this site, but I could really use some personal situation knowledge from the guys that live and breathe these engines!. I thought the gas was absorbing moisture so I started using Startron additive per the advice of the same mechanic. This forum has grown into one our largest forums here at Her-Motorcycle. About 8 miles later, I returned home and the carb backfiring had returned, although not as pronounced as before. Bike was running rough at take off had to rev up and sometimes hesitant between 2500 and 2800 RPM on third and fourth gears. Even more so after you've run the battery down, tried push starting it or even leaned the bike against something so you can deliver a "better" kick, yet it still won't start and run properly. All of the symptoms you describe could very well be caused by a weak or intermittent spark. Then, last week, I started it up and when I put it in gear it began to rev really fast. Then a few mins later in stop/go traffic on the highway the bike started backfiring through the exhaust and running very very rough. Rough idle, low power on acceleration, backfire on acceleration along with black smoke, hesitation Out of the blue the 75 FJ40 started this behavior after starting it up two days ago. Get a small piece of copper wire that will fit through the jet and make sure you don't have blockage. Terms often used are: Stuttering Hesitating Running Rough etc etc. I ride it to lunch today and its worse. Rough running and hard starting when hot are classic symptoms of a bad magneto coil. My Quadmaster was getting very hard to start so I put a carb kit in it except the diaphram and float. You may have to register before you can post: click the register link above to proceed. You have got to prove to yourself that this thing will run, and run good. Just this morning started to shake real bad off and on while driving. On to the problem. com is dedicated to the Honda CB750 SOHC and DOHC motorcycles and to their owners who love to ride, restore, and customize them. After about a minute the car immediately started running better. Thinking it was > bad gas - small town and not a lot of turnover on the hi test stuff - I dosed > the tank with alcohol to deal with water. Terms often used are: Stuttering Hesitating Running Rough etc etc. I've noticed that when the blades are engaged and I'm mowing it doesn't do this. It has done this several times, I get it running good and after it sits for a day or 2 it runs rough and backfires. Have a compression tester coming but I don't suspect that's the problem. Panic in Times Square after motorcycle backfire: A motorcycle backfiring in New York's Times Square on Tuesday night sent crowds running in fear, following a cluster of deadly mass shootings in the U. By Wired George (his website is wiredgeorge motorcycle carburetors - Vintage Japanese Motorcycle Carburetor Sales, Rebuilding and Restoration - Home) Condition/Symptoms: A problem common to MOST vintage motorcycles is often characterized by hard starting, rough running, backfiring, and sooty or fouled spark plugs. Why is my Susuki GS 750 backfiring? My motorcycle runs rough. Different owners seem to describe this problem using a variety of expressions. If I try to give it the gas, it does the same thing but only more. If some fuel can get through then using a cleaner may work. You may diagnose valve problems at home with the use of a compression gauge or a vacuum gauge. Why is my motorcycle running rough? My motorcycle runs fire when its accelerating hard but when its at low revs it stutters and lags. The motorcycle brake system are very soft and with high safety. At first I didnt think much of it but once on the highway it got worse, going about 80 Km/h(~50 MPH) my bike suddenly lost power then started back firing a bunch. I’m probably the only person in the world who can’t wait for the next oil thread in my motorcycle discussion group. In 2013, the National Highway Traffic Safety Administration reported 88,000 motorcycle or scooter accident injuries. You may have to register before you can post: click the register link above to proceed. That doesn't make a whole lotta sense. If your Buell Motorcycle is experiencing problems and you could use some friendly advice to help diagnose/troubleshoot the issue, please first review the extensive listings of issues already documented below; if none match your particular Buell troubleshooting issue, then please initiate a new thread here and post a thorough description of your particular Buell Motorcycle problem. Too much fuel is delivered, resulting in unburned fuel in the exhaust. 3 hours ago · Lopez tries to get a feel for Bravo by talking to his new teammates but runs into rough territory with Clay and Sonny. -Our stage 2 map for a free flowing intake and exhaust. As a guest you can view the forum and photo galleries, but you have to register before you can post or view attachments. Here are some thoughts on getting a none running bike, running. Within about 50 miles of home topped off (half tank) with 89 octane to see if it would help. Diagnosis - 17% Poor running with black smoke under heavy throttle Transmission shifting problems Backfire Spark plug fouling and diagnosis Undershifting or jumping out of gear problem Coil diagnosis Hard starting or no start problems Low oil pressure Restricted air intake Rough running and backfiring problems Ignition & Electrical - 20% C. Sprayed thoroughly whilst running though. Only did it for a block. I got it home and it idled rough. By understanding why backfires happen and knowing the methods of prevention, you can keep your motorcycle running like a dream. I have a Kohler engine on my lawn mower and it will backfire after mowing if you shut it off right away. OkayI'm going to throw you guys for a loop here so hang on. but that backfires almost immediately when the cars are destroyed by. 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. the engine races at a very high speed and will not idle down. NEW YORK (CBSNewYork) – There was widespread panic Tuesday night in Times Square after crowds mistook a backfiring vehicle for another mass shooting in America. On the side of some carburetors there is another diaphragm that temporarily closes the slow speed jet air passage when the throttle is closed. my polaris Magnum 425 runs rough (coughs and sputters) when it is left outside when it rains. While the alky is good for me it's not real good for your bike. All of the symptoms you describe could very well be caused by a weak or intermittent spark. Matter of fact, it just made my bike run all round better. Question: What type of motor oil is best for scooters? Answer: I'm not sure there is one right answer to this, but the prevailing wisdom seems to be that you should refrain from using synthetic motor oil for the first 1000 miles. If I just have it in transport mode or just sitting there it starts to sputter/backfiring. and listen for where the backfiring occurs. I've noticed that when the blades are engaged and I'm mowing it doesn't do this. If I leave the choke on and let the bike get warm it runs for a bit and then slowly dies. Rubbermount_EVO Run rough, loud backfire, carb rebuilt Sportster Motorcycle Electrical and Ignition Still running rough and backfiring. After about 30 minutes of city driving, it began to run poorly around 2500 RPM, then began running rough and backfiring at lower RPM. Tightened it down. Basically, the idle was rough, the surging was driving me nuts, from 4,100 rpm and above there was excessive vibrations, power seemed to taper off above 7,000 rpm and I could barely get her to 180 kph (112 mph) with the Givi bags on. I did notice that pressing on the balancing screw between carbs 1&2 had quite an effect on the idle dropping. Symtoms include missing, surging, backfiring, etc. that has put many people on edge. I just bought an 85 FJ1100 and it has a K&N air filter with a Vance and Hines full exhaust. I assume it is the valves but thought I would ask some of the experts here before I tore it apart. Engine running and electrical problems ? As motorcycle electrics gets more advanced so too the number of problems that can occur. #1: Hesitation at low rpm ??? (solved) Author: vira-go, Posted: Thu Jun 03, 2010 5:47 am I just bought the bike a couple of months ago, 1994 XV750. 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. So if there is excess fuel in the cylinder and the valves are open, you can get a backfire when the plug fires. I put star washers under all 4 screws. It all started to happen about a year ago and has gotten progressively worse. Also, keep in. It all started to happen about a year ago and has gotten progressively worse. Additive to clean carbs on a motorcycle. that has put many people on edge. Under very hard acceleration, the bike seems to just flybut even when I hold the throttle steady at 3K rpms on upit runs rough and backfires and sputters. SV650 backfires at idle I would do a TB Sync for sure I have a TL and it would pop through the TB's and run rough Its a easy fix worse case you might need a valve. The department tweeted Tuesday. This is a discussion on Briggs V Twin runs rough within the Small Engines forums, part of the Tech Support Forum category. Bike was running great until tangle with another rider and went down. Triumph Rat Motorcycle. Spark plug fouling is a common cause of engine misfire. Riding in boots I don't notice. It starts and runs fine but runs rough. > wants 'em. Car is popping/Backfiring in the Intake? all the time it will run rough the pop then clear up run fine for into closed loop runs vary rough popping backfire. I think it may be ignition, timing, or carburetor related. The problem I had on my brand new Atomik 250 (Loncin engine, mukuni carb) was that the engine wouldn't start without heaps of priming and when it did eventually kick over, it would run rough, coughing and backfiring until it cut out. Only did it for a block. After about 15 mins she showed up and said her bike would not stay running. Also, keep in. In order for a motorcycle to start. Even LarryBMW72 took her for a ride and agreed that the pig should run better. NEW YORK CITY (AP) — The New York Police Department said the loud noise of a motorcycle backfiring caused a panic and sent people scrambling in Times Square. Therefore, if your engine is not running due to a crash or being stored, no fuel should get from the tank to the carb. that has put many people on edge. Since the engines with the fueling through Carburetors can be tuned manually we can always alter the condition by tuning the carburetor. Too much advance will cause hard starting and pre-ignition. One cause of this is the spark plugs are not firing due to the head covered with black soot residue left on the spark lead from the rich fuel mixture – which is a result of a dirty or clogged air filter. Different owners seem to describe this problem using a variety of expressions. Top 10 Scooter Problems & How to Solve Them! Posted October 28, 2009 The following information is for informational purposes only. My car is running extremely rich and has a terribly rough idle with extreme hesitation when applying throttle. The backfiring of the motorcycle is a signal that something isn't quite right. By Wired George (his website is wiredgeorge motorcycle carburetors - Vintage Japanese Motorcycle Carburetor Sales, Rebuilding and Restoration - Home) Condition/Symptoms: A problem common to MOST vintage motorcycles is often characterized by hard starting, rough running, backfiring, and sooty or fouled spark plugs. Car will run rough ,backfire and you may be able to here it rattling. In order to be able to post messages on the Motorcycle Forum. By understanding why backfires happen and knowing the methods of prevention, you can keep your motorcycle running like a dream. So I got a gauge set and sync'ed the carbs. Too much fuel is delivered, resulting in unburned fuel in the exhaust. Started up fine. All of a sudden my bike is running rough. Too much fuel is delivered, resulting in unburned fuel in the exhaust. I bit the bullet and took the carbs off, reamed out the jets with carb cleaner and a single nylon bristle cut from a brush that could fit inside the jet. A cylinder running lean can also be over temp, but not always. At idle it back fires and runs quite rough. The airflow into the motorcycle is increased because of the difference in pipe design and other specifics. with a little backfire every now and then on the decel. It's strange, You wouldn't notice any problem the way the engine runs. I’ll write an article on how to diagnose poor running conditions shortly, but for now – lets just deal with the carbs. Could it be running rich? Just had the carbs cleaned by someone that maybe didn't adjust the fuel mixture correctly. KZRider, KZ, Z1 & Z Motorcycle Enthusiast's Forum 81 KZ440 LTD idling rough, coughing, backfiring 26 May 2011 20 Also running a lot of seafoam through and. Well they had already ordered the injectors but told me I could take the bike until it came in. > wants 'em. I did the Seafoam thing. Based on the above data, there are some simple tests you can perform to help you solve your motorcycle's backfire issues: Once fully warmed, decelerate the engine from a high r. Here are some: Stalls at idle, stalls when I put the clutch in, stalls when I turn a corner, misfires, surges, no power, cuts out, no power at top revs, runs rough, etc. Witnesses said it sounded like. The mechanic told me it might be carbon buildup in the engine. 035 (as per the NGK catalog), Still sputters, coughs, backfires, etc. When I stopped at the next light I immediately noticed that it was running rougher, popping, and backfiring here and there. Worn engine parts such as valves, rings, or camshaft will cause a rough idle. Back-story: I bought this C50 new in 2005 from the dealer with 0 miles on it. Backfiring thru the carb at idle when warm probably means you are running a tad lean. I had the same thing happen to me. Re: Runs rough, misses, backfires, battery goes dead ive had the same problem you had. Curious more then concerned, every once in a while when my bike is still warm but and I go to fire it back up I get a backfire out the exhaust. He says they do have variable timing of some sort inside the coil and tgat the only way to disable it would be to run a different flywheel, thus eliminating the use of the 18 amp charge system. This continuous ignition is what keeps a car moving down the road. loosing battery charge fast, rough idle, sluggish response, dies when idling, all the fun and frusterating things that make you wanna go ape sh t. edu 1963 1963. Get a bottle and some hose and discover. -Our stage 2 map for a free flowing intake and exhaust. Please advise me on what the real symptoms of lean vs rich system is. 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. It also cuts out, runs rough and surges on half throttle. The backfire is gone, the engine runs fine and the spark plugs are the color they are supposed to be. Witnesses said it sounded like. IMHO dump the pod filters and get a stock airbox asap. Motorcycle running rough at idle? Have a 96 ninja and I cleaned the carbs and its running much better except at idle it just feels really rough and also the rpms are a little slow to drop when you let off the throttle. Crf 250r serious backfiring problem No problems starting. Then a few mins later in stop/go traffic on the highway the bike started backfiring through the exhaust and running very very rough. The bike has been running great. The car will start but runs rough at low idle I cannot increase the RPM - it shutters, shakes, and backfires. NGK 5K ohm caps can be obtained at. Lot of backfire through carb and. Spark plugs provide the spark that ignites the air and fuel mixture within the cylinders. Cleaned the carb 2x, new air filter, plug, and the gas is new. Doityourself. It now idles great - but at half throttle it is running rich and backfiring. Includes troubleshooting information. C50 running rough, backfiring, won't stay idle. I can tell you this: surging, especially surging that briefly stops when you apply more throttle, is a textbook symptom of a lean condition. When it first happened sounded like a gunshot. Before this point it was running fine. Changed plugs(NKG) didn't change. Running rough could cause the fouled plugs. Will not start. Why does my engine spit or backfire? First off, you need to determine whether it is backfiring out the exhaust or back up through the carb. Again it should be emphasized, the #1 cause of carburetor related problems on a Harley or other V-Twin motorcycle is VACUUM LEAKS. A backfire is a sign that your car isn’t running efficiently and needs to be addressed in short order. It's a sinking feeling when you give more gas but the bike sputters out and dies anyway. When an engine is running lean, there is more air than there is fuel. Outdoor Gasoline and Electric Powered Equipment and Small Engines - Need Help Eliminating Backfire and Rough Running Briggs & Stratton Engine - I need some direction to solve a problem with my. Fuel burning in. The backfire is more than likely excess oil igniting in the combustion chamber of the blown head gasket side. The backfire is gone, the engine runs fine and the spark plugs are the color they are supposed to be. Got it home and changed the plugs and fuel filter so far with no effect. Ive had the Carb cleaned and it is clean(ive seen it) and ive also changed the air filter but this has made no difference!. " Would this suggest that running the engine with the carbs exposed, or running it with pods is in fact causing the issue because there's too much air getting in?. ? I am resurrecting my 1884 Honda Nighthawk 700sc. Although it did run better, I still had the issue of miss firing or not firing at all at low rpms for a few moments. I had the carbeurator rebuilt but still runs rough and backfires. There is another way to remedy this other than installing an idle stop solenoid which involves the vacuum advance and the ignition timing. When an engine is running rich, there is more fuel present than air, according to DoItYourself. When you floor it, it pings a little on occasion but not always. Reading about backfires and running lean etc I decided to give it a try and adjust the Pilot jet screws to make the mix richer. 2003 speedmaster is running rough at low rmp. If you let it run for a minute or so at idle it will never backfire. Rough just off idle and while trying to diagnose the issue, the bike refused to go above. I tried all the above tricks with the carburetor cleaner (I even found a Gum out product) and it still backfires and then runs for 20 min and then backfires under load. A fuel mixture that is rich could be the cause of rough idling. Went out and finally managed to get my exhaust fitted to my downpipes using a gasket I made from a can of Macaroni Cheese Anyway, tried to start my bike after it and it wouldn't start, it was turning over but just wouldn't fire up, then it sounded like it was backfiring Battery got drained so I just fully charged it and same is happening - turning over but not firing up!. I put about 1k on it the first year. Seriously Please Help Backfiring/smoke exhaust Ducati 1199 Panigale Superbike Motorcycle Forum: They told me that the rough running and surging etc was Just. Backfiring/popping. Now it is running worse, it is stumbling and backfiring. Now, everytime I start the bike it begins to rev, even though I am not opening the throttle. Facebook gives people the power to share and makes the. After cleaning, repairing, and reassembling your carburetors, you’ll need to balance and synchronize them. A backfire is the result of fuel being burned somewhere other than in the cylinder. A backfire can be caused by events such as shutting down the engine too quickly or rising up on the seat and activating. nope i was. Just this morning started to shake real bad off and on while driving. Could it be running rich? Just had the carbs cleaned by someone that maybe didn't adjust the fuel mixture correctly. In pdf format, no special software is needed to download and view a manual. Sometimes a lean condition will cause a “hanging” idle that is slow to settle down to set idle speed. After it starts to get warm it starts to sputter and has a little backfiring. I was wondering whether I drain the float bowls during acceleration and this is why I removed a 1mm washer on the right carb. It didnt get rid of the backfiring all together but it sure lessened it. Low battery causes uneven running There are a number of threads here about uneven or rough running at low RPM. I put star washers under all 4 screws. I barely made it home. It runs just fine after it starts and is not running hot. Took the bowl off, full of gas. Adjusting the pilot screws on #2 and #4 cylinders has little effect on the RPM. Since the engines with the fueling through Carburetors can be tuned manually we can always alter the condition by tuning the carburetor. Engine running and electrical problems ? As motorcycle electrics gets more advanced so too the number of problems that can occur. The bike is bone stock except for a 200 size rear tire. with a little backfire every now and then on the decel. not sure how to rule out carburetor problem or what. that has put many people on edge. Here's the scoop. I can tell you this: surging, especially surging that briefly stops when you apply more throttle, is a textbook symptom of a lean condition. 97' Bandit 1200S runs rough. In order to be able to post messages on the Motorcycle Forum. from 3K to 6K rpms. SYMPTOMS OF INCORRECT IGNITION TIMING Symptoms of incorrect ignition timing are poor fuel economy, sluggish acceleration, hard starting, backfiring, or "pinging" or "spark knock". I just cleaned the carbs (only thing I've done so far) and now it runs and idles pretty. the car's been idling really rough lately,. I couldn't get a carb backfire no matter what I did. I've not had intake boots off to thoroughly check them - that's next on the list. It's still strong and I get no hesitation under throttle or idle. The RZR570 runs a bit on the lean side from the factory and can have some backfiring under decel. I just cleaned the carbs (only thing I've done so far) and now it runs and idles pretty. The air/fuel ratio can also be affected by changes in altitude. After a short ride, we stopped for her to get gas. Bike was running great until tangle with another rider and went down. Doityourself. An engine is incapable of running at its usual level if there are internal damages or issues. A severe case of stiction will cause a vehicle to spit and sputter consistently. that has put many people on edge. It never dawned on me that the battery was low on charge cuz it still did sta. I’ve found a few things about the 650nk that are worth mentioning. Guys, I don't think I have ever had my Trophy running properly, I do minimal miles on it because there always seems to be something wrong. It now idles great - but at half throttle it is running rich and backfiring. 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. The idle is surging up and down and when i try to rev it up it pops and backfires. you'll know a backfire when you here it, because your bike will sputter and idle roughly, then you will hear a very loud BANG! that sounds like a gun shot. When an engine is running rich, there is more fuel present than air, according to DoItYourself. Witnesses said it sounded like. A scooter’s smaller wheelbase makes for better maneuverability and turning. See title: runs fine for about 10 minutes then starts cutting out, backfires, and dies. At first I didnt think much of it but once on the highway it got worse, going about 80 Km/h(~50 MPH) my bike suddenly lost power then started back firing a bunch. you will never get it to run right with the pods in place. Backfire out of the exhaust is caused by running too rich. Once 11000 km (solved by changing the stearing box)other times at 15. Three things I would check, first check to make sure that all connections on the exhaust are tight. Every once in a while, when I start my bike in the morning, either with the choke on or off, I get a loud bang out of the exhaust instead of it starting. A couple of days ago the car was again running rough at low idle as I drove home from work. Adjusted the brakes and clutch lever, rerouted my janky throttle cables, and corrected my barkbusters. On the side of some carburetors there is another diaphragm that temporarily closes the slow speed jet air passage when the throttle is closed. Rough Cut (no reporter narration). Share Thread It will not idle and run very rough backfiring and dying constantly. The DME computer in turn supplies a leaner mixture to the engine than that which is normally required. Started it back up and sitting in neutral rolled on the throttle to rev the engine a few times and watched the tach erratically jump around. A backfire can be caused by events such as shutting down the engine too quickly or rising up on the seat and activating. I also went ahead and cleaned the throttle bodies, air filter, and put new plugs and fresh oil in. Fuel burning in. SYMPTOMS OF INCORRECT IGNITION TIMING Symptoms of incorrect ignition timing are poor fuel economy, sluggish acceleration, hard starting, backfiring, or "pinging" or "spark knock". In fact, one should expect a well-tuned high performance engine to "pop" and "crackle" when the throttle is closed at high rpm. The engine would run on the generator/alternator at higher speeds but would run rough, backfire or kill when the voltage dropped off at lower rpms. Was running great and then towards the end it started running rough, backfiring a bit and sputtering. Victory Motorcycle Forum > Victory Motorcycles. For example if the engine is running at Wide-Open Throttle at 3900 RPMs, it calculates the fuel value to be 44 that is half way between 33 and 55. 000 km problem not solved due to changing of idle step motor and updated many times running program (been waiting two months. Good Luck though mate. Hi everyone, I recently bought an 82 cb750k and have been trying to get it running. fouled plug? Stuck choke? Any other input is welcome. The end of the spark plug after 30seconds of sputtery running is slightly black and runny looking. However, if the bike was winterized, it will need some basic maintenance before it is ready to ride. When it behaved that way it would also backfire a lot (very It was still running rough and at low idle. Add fuel to the cruise range, then ride the bike and see if there is a change. I had the same thing happen to me. Re: Runs rough, misses, backfires, battery goes dead ive had the same problem you had. Running Problems. Rough just off idle and while trying to diagnose the issue, the bike refused to go above. Bruce Recently returned from long trip and our 87 Coachmen started running rough under load. Also like when you ride in a wind storm, how it sort of goes better or not depending on the wind hitting the bike. R6 03 - 05 (5sl) running rough It's doing quite a few weird things that i think are all connected to one big problem. Now recently I have been having problems with the bike running rough and big exhaust backfires when. Riding dwn the road, it started to rough idle n backfire like running out of gas. It is running so rich the exhaust fumes burn your eyes. Got off and listened closer, bike was running really rough, idle was down to about 1100 and it was still backfiring. These items are all important parts of what keeps a vehicle running. Lubricate with decent lube on the inside run first, preferably when the chain is warm. The engine should run a bit rough at idle when cold if jetted properly. Please advise me on what the real symptoms of lean vs rich system is. Since 2004 S&S shorty carbs have been fitted with an adjustable main jet air bleed (#13). The engine started running a little rough at first. Rider Safety. Join Facebook to connect with Gary Motorcycling France and others you may know. Now I can start the bike and it runs fine at idle, gv it a lil gas and dies, now I turn full choke and give a lil gas and I can limp her home. Valve problems of these type tend to create a more consistent backfire condition. I replaced the plug and gapped it to. Coming off idle it loads up and bogs, and sometimes backfires. Your Flyscooter should be looked at by an authorized Flyscooter dealership. 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. He stated that the thimbel is the right size and is cheap. Runs better (but not good as it warms up) Spark plugs overly clean …with no deposits or slight glazed appearance ; Rough, erratic idle that drifts toward higher rpms than expected based on the setting of the curb idle screw. NEW YORK (CBSNewYork) – There was widespread panic Tuesday night in Times Square after crowds mistook a backfiring vehicle for another mass shooting in America. I have replaced the AFM, O2 sensor, tested the ICV,replaced the TPS, replaced the engine temperature sensor, and replaced the intake manifold gasket. I thought perhaps carbs needed sync. Backfire/runs rough at high RPM It broke an intake push rod and I replaced it and then adjusted the valves to the recommenced clearances. But it was hard to start, and when I did get it running, it "pops" back out the carb and the engine stutters for a second. A motorcycle backfiring in New York's Times Square on Tuesday night sent crowds running in fear, following a cluster of deadly mass shootings in the U. Maybe a backfire or two. NEW YORK CITY (AP) — The New York Police Department said the loud noise of a motorcycle backfiring caused a panic and sent people scrambling in Times Square. Afterfire occurs after the engine has been shut off. I did a search and found a comment stating "If the engine backfires through the carburetor, misses, cuts out or quits running, the main jet is lean. the car's been idling really rough lately,. KZRider, KZ, Z1 & Z Motorcycle Enthusiast's Forum 81 KZ440 LTD idling rough, coughing, backfiring 26 May 2011 20 Also running a lot of seafoam through and. Even LarryBMW72 took her for a ride and agreed that the pig should run better. Now that the computer has the main fuel value, it needs to determine if any "adjustments" to the fuel map value are needed. 3 hours ago · Lopez tries to get a feel for Bravo by talking to his new teammates but runs into rough territory with Clay and Sonny. Hey, I have a 2003 VTX 1800R in the last couple of weeks it has been backfiring really bad when I let off the gas real quick or change gears. The backfiring continues even if the RPMs are held so it is not an acceleration or deceleration issue. The idle is surging up and down and when i try to rev it up it pops and backfires. Ok now about my mower what i mean about run rough at hi rpm is it fires right up runs very smooth from idle to about mid throttle from there to full throttle it runs rough rpm up and down and pops out the exhaust. Under very hard acceleration, the bike seems to just flybut even when I hold the throttle steady at 3K rpms on upit runs rough and backfires and sputters. When an engine is running lean, there is more air than there is fuel. Had recently filled up and thought it might be bad gas. Why is the engine bogging under acceleration? I recently managed to get the moped running properly, albeit for only a short time. If your Buell Motorcycle is experiencing problems and you could use some friendly advice to help diagnose/troubleshoot the issue, please first review the extensive listings of issues already documented below; if none match your particular Buell troubleshooting issue, then please initiate a new thread here and post a thorough description of your particular Buell Motorcycle problem. I bit the bullet and took the carbs off, reamed out the jets with carb cleaner and a single nylon bristle cut from a brush that could fit inside the jet. As a guest you can view the forum and photo galleries, but you have to register before you can post or view attachments. A backfire is the result of fuel being burned somewhere other than in the cylinder. My wife’s 2005 FLHTCUSE2 began to develop problems a few weeks ago. Unless you have replaced the ignition system and changed to single fire, you are sparking the cylinder that is on its exhaust stroke too. Next check the carb boots and make sure that they are seated up to the intake completely and that the carbs are fully seated in the boots. com so its time to change and make this section more friendly to our visitors.