Sportster misfire. I have a Street Glide Special, 2021 M8 114.
Sportster misfire It often happens due to spark plug issues, faulty ignition coils, or fuel delivery problems. I can be in Dec 14, 2011 · 2006 sportster misfire Jump to Latest 3. Low-speed backfire and misfire after high-speed runs often indicate ignition timing or fuel delivery issues. The rear is less black but is not wet with anything either. Unfortunately, there is still just the slightest misfire at low RPM / Low Throttle situations. It will rerpeat this randomly. Dec 20, 2012 · Now that I have the top end all back together and have had the opportunity to ride it for a short distance on two occasions I pulled the plugs when readjusting the pushrods and the back plug was fouled with a soft black fuzzy carbon deposit. . When I first bought the bike it would noticeably miss a beat from time to time. Was going to go through the top end anyway and I found the intake gasket on the rear cylinder burnt through, creating a gasket thick sized intake leak which must have been leaning Mar 21, 2012 · 2006 Road King fuel injected, no modifications. Intermittent misfires at low revs, especially when hot, often stem from faulty ignition coils or spark plugs. i have change the Shop Ignition Coils - https://www. The carb was previously jetted by Harley Davidson for the pipes. If you are experiencing no-starts, misfires, or poor acceleration, this article may help. It occurs when the engine fails to ignite the fuel mixture injected into its cylinders, resulting in inadequate combustion that reduces power and can cause other issues. May 11, 2024 · For 2007 and above SportstersHey all. Causes might include damaged ignition switches, faulty crank sensors, blocked fuel filters, dirty throttle bodies, or wiring issues. Sportster 883 has Misfire on Front CylinderI have a 2010 sportster 883XL that loses spark on the front cylinder for a few seconds then picks up again. Only at low rpms though. Jan 22, 2024 · I'm new around here, and I'm still getting the hang of how to introduce myself better. Being intermittent I just couldn't trace it. Inspect ignition coils for cracks or heat damage. When I start it up and until it gets good and hot, the front cylinder doesn't want to fire right. This only happens at certain rpm's (no tachometer on bike) and higher, usually at speeds of 60mph or greater. Spot ignition coil issues early to keep your Harley running strong. They told him the carb needed to be rejetted because it had Screaming Apr 22, 2020 · Iron 883 misfiring/stumbling at 2500 RPM iron883 misfire sportster Jump to Latest 3. Also, once the engine does get warmed up it starts with the carb farts. But this will apply to any motorcycle, atv, dirtbike, car Sportster models often face ignition coil failures and clogged fuel injectors causing misfires and stalling. This always coincided with my hitting a bump in the road. I noticed a misfire every so often around 2500 rpms. I recently purchased a 2002 EGlide EFI (FLHTCI). Sportster 1200R may experience backfire and misfire after sustained high-speed riding, especially at low speeds. The bike Jun 8, 2014 · why would my 1996 sportster misfire on rear cylinder ? - Harley Davidson XL 1200 C Sportster Custom question Jul 6, 2011 · the misfire or sputter occurs at random. I have a Street Glide Special, 2021 M8 114. Harley MAP sensor failure symptoms These are the most common symptoms of the Harley MAP sensor failure. but i have drained the tank and installed fresh gas from a different location. Jul 17, 2025 · Experiencing a misfire under load with your Harley Davidson can be frustrating. If felt like it was choking out and would load up or miss but only at highway speeds. May 12, 2016 · Disclaimer: I used the search button already. Check the ignition timing advance mechanism for sticking or delayed return. Start by inspecting and replacing spark plugs if fouled. Check for worn spark plugs and replace if fouled. If you don't have the equipment to diagnose certain components, you could swap parts front to rear and see if that moves the problem to the rear cylinder. When running down the road at a steady speed and fairly low RPM, say around 2500, every once in a while the bike will have a very sudden and slight misfire. This article will guide you and help you diagnose as well as correct the many problems that can hinder your Sportster's engine performance. Had harleys since '1998 but this is only my second sportster. Despite new plugs, wires, and a rebuilt carb, check the Dyna S ignition module for proper operation. So at the end of last season my bike started to misfire at 60+ mph. Mar 23, 2012 · OK – thought I might be able to trouble shoot this by reading all the other threads I could find on it, but I am not sure my problem fits exactly with the others I've looked at. com/motorcycle-ignition-coils-and-covers?utm_source=youtube&utm_medium=description&utm_campaign=How_to_Test_a_Har Jul 19, 2020 · And I still can't think of a logical explanation for a weak fuel pump to cause only one cylinder to misfire. jpcycles. May 16, 2009 · Bought a 2007 Sportster 1200 Classic, 13k miles, bike ran good but developed a miss at a steady speed, around mid throttle range. Stock everything except straight pipes. However, I'd like to ask for help, as I've done a lot of research and haven't found any solutions. I have just over 15,000 miles on it Jul 18, 2023 · Rev up your ride with Harley Davidson 1200 Sportster Common Problems ! Explore tips to tackle common problems for a flawless journey. Oct 12, 2023 · Harley Sportster owners may experience sudden power loss, stalling, sputtering, or backfires. Feb 19, 2016 · Harley Davidson Sportster: Ignition Diagnostic Guide The ignition system ignites the air/fuel mixture inside the combustion chamber. By understanding the possible causes, such as faulty spark plugs, clogged fuel injectors, malfunctioning ignition coils, and issues with the air intake or fuel delivery system, owners can troubleshoot and resolve this issue effectively. Harley Davidson Sportster Engine Problems by Symptom Get to the root of your engine's leaks, noises, misfires, and performance issues with our step-by-step diagnostics. The bike was giving him trouble spitting and sputting so he took it back for repairs. When it's warmed up, (normal temperature of operating -- After Dec 8, 2011 · For discussing problems about your Sportster motorcycle that don't fit anywhere else. Dec 4, 2015 · Sportster Backfire Cause Remedy Jump to Latest 21K views 6 replies 4 participants last post by Thunder~Struck Dec 4, 2015 Maxz695 Discussion starter Sportster often faces misfires under load and carburetor tuning difficulties causing inconsistent performance. Its a stock 2005 Sportster Roadster (CV carb) with 2500 miles on it, I bought it with 2240 from a one owner friend of mine. some times on downshifting from 3-2 then rolling on the throttle. When performance suffers, the task of figuring out where to just start often creates confusion. Jun 23, 2005 · Alright, I got a 98 883 Sportster. Starts But Runs Irregularly or Misses I have a '05 sportster that misfires intermittent, almost exclusively at low revs especially when idling when the engine May 7, 2013 · Hey guys, First off the bike is an 06 883 custom. 1K views 5 replies 6 participants last post by Hillsidecycleco May 23, 2018 Dec 26, 2015 · Well my '89 FLHS 80" Evo with 103K miles and the unsolvable lean misfire in rear cylinder is no longer a mystery. I bought it used at an auction so really dont know its history. Feb 14, 2024 · In conclusion, engine misfires are a common problem with the Harley Davidson 1200 Sportster. Exited about my new ride I just bought 2 months ago. Accelerating was great and it ran like a beast until 5th gear, 2900 rpm, 60 mph then it would Jun 20, 2012 · I have a friend that purchased a used 2005 Sportster from a HD dealer. And I also noticed that the rev counter (electronic) needle would plummet on each occasion also. It doesn't seem to Sep 6, 2009 · Does anyone know what may be making my 05 Sportster 1200 Custom misfire in the rear cylinder? It pops while idling out of the rear pipe. 8K views 4 replies 3 participants last post by Hillbillyexpress Jul 19, 2024 Tyler Mann Discussion starter Have you had an issue where your Harley started to Misfire? Check out our Member Q&A for a solution to the problem. It starts fine. Oct 19, 2023 · As soon as the third-party part or an upgrade is performed on the Harley, it starts behaving unpredictably. Not consistent, happens Dec 11, 2011 · 2005 883 Sportster misfire I have a 2005 Sportster 883 Custom that will misfire or as I call it spit. Sep 14, 2021 · 2014 sportster misfire Jump to Latest 2. Wether the bike is warm or cold it does it. It is intermittently missing on the rear cylinder Rear cylinder misfires on a 1997 Sportster 1200 can stem from faulty spark plugs, weak ignition coils, or carburetor issues. It has slip ons but stock a/c no tuner unless it was flashed. Apr 19, 2024 · The misfire/surge runs from about 2100 to 2800 rpm but rolling the throttle on from 3000rpm in 5th gear is impressive reaching 110mph (on the speedo) quickly, I have no problems keeping up with tuned big twins and suprise quite a few sports bike riders. When a MAP sensor I have a misfire on a 90 sportster-1200 conversion,new plugs mild andrews cams [490 lift] supertrapp pipe,rejetted carb - May 15, 2018 · 2004 Harley sportster 883 “backfire with loss of power when accelerating” 2 reading Jump to Latest 9. Random misfires under load on a 1990 Sportster can stem from ignition timing or fuel delivery issues. Nov 29, 2010 · Hey everyone, New here and to Harley's. But if i rev it up slightly and hold throttle steady it starts to misfire badly. This can be in the form of a misfire when starting the engine or backfiring. 3K views 5 replies 3 participants last post by n05stang Sep 15, 2021 N Sep 21, 2020 · Engine misfire can make the motorcycle engine run irregular, cause slow acceleration, rough idle and excessive vibration. 9K views 4 replies 5 participants last post by SCHMIDTY Dec 15, 2011 8 Feb 19, 2016 · Harley Davidson Sportster: Engine Performance Diagnostic Guide It takes time and effort to maintain engine performance at like-new condition as the miles increase. Misfires Misfires are one of the most common and noticeable symptoms of a faulty Harley MAP sensor. A spark occurs at the correct time to create optimum engine power. Bike not riden much over the past year. The 2014 Harley-Davidson Sportster motorcycle general troubleshooting guide list possible causes and actions needed to fix a Sportster that starts but runs irregularly or misses. The bike has V&H oval slip-ons, K&N breather and stage 1 If your bike is running on ONE Cylinder (or none) not firing on other - check this (any vehicle) Harley Davidson V Twin Road King (2007). The engine light comes on as well, then goes out again. 1. My did it mainly while I was idling and goosing the throttle. I wish I could make the noise for you. Learn the key Harley coil symptoms like stalling, misfiring, and backfiring. I replaced plugs and wires already, no change there. I've checked all wiring connections, checked the battery and charging system to make sure it's all getting enough volts for good spark, and I've checked the VOES as well. First post. but the times i notice it the most is in 6th gear at 74mph at 2800rpm it fells like bad gas or like it looses the crank signal for a second. I have changed the plugs and the front jug plug is blacker and appears to be burning fine. Other Reasons a Harley Might Backfire Include: Failing fuel pumps Incompatible exhaust Low fuel pressure Unbalanced air-to-fuel ratio Exhaust leak Fuel filters are blocked. When I first take off, the bike will misfire at low rpms. At the time of purchase he bought a 4 year extended warranty. qkbcb cz u9svr 8dup nod evti 5svb0v srro bzvr aauh870