Sportster misfire. Here’s one owner’s advice to a fellow .

Sportster misfire Apr 17, 2008 · On my Evo, every since I brought it, it ran bad. As soon as I shift into 2nd I lose all acceleration with anything more than 1/4-1/2 turn of the throttle. I have a 97 1200 sportster. Customer: front cylinder misfire Mechanic's Assistant: How many miles are on the bike? Is it a steady misfire? Or random? Customer: 13k, random Mechanic's Assistant: What is the make/model/year of your bike? Customer: 2005 sportster Mechanic's Assistant: Are you fixing your bike yourself? What have you tried so far? Customer: 1200c Mechanic's Assistant: Anything else you want the mechanic to Nov 16, 2024 · Enough to initiate a rear cylinder misfire code. When performance suffers, the task of figuring out where to just start often creates confusion. This comprehensive guide covers common causes, step-by-step troubleshooting, and essential maintenance tips for smoother performance. It would back fire through the carb and it seemed like the rear cylinder would cut out. A front cylinder misfire on a 2005 Sportster 1200C often stems from faulty spark plugs, ignition coils, or wiring issues. I can give it full throttle and all it will do is misfire badly. We will explore the problems and potential fixes for your Harley. only ridden 6 times in the last 5 months, and lately Aug 24, 2010 · The intermittent misfire on my '03 Ultra ended up being a faulty FI wire. However, like any mechanical equipment, these bikes are subject to wear and tear over time, which may lead to certain issues. Does not do it all the time just some times. Upgrading to an Andrews cam with . I. Jan 6, 2023 · 1. Now it will idle fine but mid range is toast. Wether the bike is warm or cold it does it. Jul 24, 2008 · I am Cruising down the road its flat about 45 in 4th gear the engine doesn't seem to be laboring, It feels like there is a slight misfire/stumble ,5thgear 50-55 same thing only more noticeable. Inspect ignition coils for cracks or heat damage. I’ll look up how to do the air leak test. However, I'd like to ask for help, as I've done a lot of research and haven't found any solutions. I checked voltage at the tmap and it had 5v. It Customer: I just bought a 2006 XL1200C sportster with 788 mi. Sportster 1200R may experience backfire and misfire after sustained high-speed riding, especially at low speeds. Intermittent misfires at low revs, especially when hot, often stem from faulty ignition coils or spark plugs. Check ignition timing and ensure carburetor rejetting matches cam specs. First post. As soon as you give it throttle it boggs On my 71 ironhead, kickstart only. 8K views 4 replies 3 participants last post by Hillbillyexpress Jul 19, 2024 Tyler Mann Discussion starter May 15, 2018 · 2004 Harley sportster 883 “backfire with loss of power when accelerating” 2 reading Jump to Latest 9. Mar 1, 2023 · Over-revved as in “hit the rev limiter”. The wire had broken inside the casing, so it looked good on the outside. Still running the same Aug 12, 2023 · Worried about vacuum operated petcock problem on your Harley. The surprising thing is if I stop or slow right down it settles down my 1997 harley sprtster 1200 started to backfire and misfire and hesitate, it backfires more when I let off the - Harley Davidson XL 1200 C Sportster Custom question Aug 13, 2016 · 03 88ci firing on only front cylinder new plugs wires coil and ignition module Idk what else to do pls help Mar 7, 2024 · A Harley that turns over but won’t start typically indicates an issue with fuel, spark, or air. It has the dyna jet kit , k&n filter , and seII on her . sportsterdoc Senior Master Custom Bike Builder Join Date:Apr 2012 Posts:14147 Sportster/Buell Model:1200S Sportster/Buell Year:2002 Sportster/Buell Model #2:XLH883 Sportster/Buell Year #2:2003 Other Motorcycle Model:Moto Guzzi V7-850 SE Other Motorcycle Year:2023 #5 15 April 2019, 18:30 Originally Aug 4, 2018 · My '86 EVO FXR, developed a problem on a ride last weekend. At the time of purchase he bought a 4 year extended warranty. Few weeks back I was out riding and my carbs overflow started to dump fuel due to the float. When I pull away though, she misfires. Warm Sportster/Buell Model:Sportster 1200 Sportster/Buell Year:1999 #10 25 August 2007, 18:29 Just checked the wire under the head light and all seems ok, the cheapest option is to replace the coil as they are about £40 over here whereas the module is about £152 Moved On Senior Master Custom Bike Builder Join Date:Nov 2004 Posts:6459 #11 25 August Weird sound misfire? Aug 23, 2025 · Faulty spark plugs can cause hard starting, rough idling, decreased fuel efficiency, misfires, and poor engine performance. May 1, 2009 · Hi guys, I got a problem that is kicking my butt and wanted your expert opinions. So at the end of last season my bike started to misfire at 60+ mph. In this comprehensive guide, we'll delve into the world of Harley-Davidson trouble codes to help you diagnose and troubleshoot some of the problems your beloved Harley may be facing. Here’s one owner’s advice to a fellow Jul 11, 2023 · Experiencing sputtering issues with your Harley Davidson? This comprehensive guide will help you troubleshoot and fix the problem, getting you back on the road smoothly. Once it warms up, when I give it throttle, it misfires badly thru both cyls. Feb 8, 2024 · Are you experiencing issues with your Harley-Davidson motorcycle? Don't worry, we've got you covered. Why is my motorcycle backfiring? A motorcycle backfire happens because of the presence Jul 31, 2013 · Sportster randomly misfiring and dying. 2002 Sportster 883XL custom Bike starts up just fine, idles fine. The bike has V&H oval slip-ons, K&N breather and stage 1 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. A couple of weeks ago I went to go for a ride with my girlfriend. (I checked it against another wire that doesn't Jun 18, 2024 · Harley Davidson 1200 Sportster often faces issues with oil leaks and electrical problems. I've done a lot of reading and I've been messing with my carb. ( I have true duals, so it's obvious) It almost goes away at 2500 rpm cruise, but the idle and gentle throttle is rough. It has slip ons but stock a/c no tuner unless it was flashed. Bike not riden much over the past year. I have been experiencing a misfire that acts like a couple of issues I've had in the past. The rear is less black but is not wet with anything either. But this will apply to any motorcycle, atv, dirtbike, car Dec 8, 2011 · For discussing problems about your Sportster motorcycle that don't fit anywhere else. Unfortunately, there is still just the slightest misfire at low RPM / Low Throttle situations. Over the past month i noticed right after i start it up even after already riding it, it will backfire more often than in the past. Jul 18, 2023 · Rev up your ride with Harley Davidson 1200 Sportster Common Problems ! Explore tips to tackle common problems for a flawless journey. These misfires can be frustrating, but understanding the possible causes and implementing troubleshooting tips can help resolve the issue. I have replaced the ignition module, but that didn't fix the problem. I've read about reading the plugs that's no problem. I little work with a small wire brush to clean it up, and a small dab of dielectric grease on the boot ( for sealing) cured my issue. (I checked it against another wire that doesn't May 8, 2023 · Posts Latest Activity Photos Pageof1 Filter new posts 201648Rider Master Mechanic Join Date:Jul 2016 Posts:291 Sportster/Buell Model:48 Sportster/Buell Year:2016 #1 For discussing problems about your Sportster motorcycle that don't fit anywhere else. The bike Apr 22, 2020 · Iron 883 misfiring/stumbling at 2500 RPM iron883 misfire sportster Jump to Latest 3. Sportster 1200 conversions often face ignition misfires and wet spark plugs under load or at higher RPMs. I have a '05 sportster that misfires intermittently, almost exclusively at low revs, especially when idling with a hot engine, often leading to stalling. I thought I could figure this out Harley Davidson Softail Misfire refers to when the Harley Softail’s engine runs but fails to ignite the fuel correctly. At first, I thought I had gotten some bad gas so I drained the tank and filled it with fresh gas. Tried messing with the idle mixture screw. replaced the line but the front cylinder still not firing. She runs like a bat outta hell but seems to cough every now and again through the carb . It doesn't seem to Learn the key Harley coil symptoms like stalling, misfiring, and backfiring. 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. 2007 xl 1200 HD Sportster misfires 2007 HD xl 1200 misfires and the motor runs rough , backfiring and it kinda - Harley Davidson XL 1200 C Sportster Custom question Weird sound misfire? Aug 4, 2018 · My '86 EVO FXR, developed a problem on a ride last weekend. Examine wiring harnesses for corrosion or loose connections. Find expert tips and step-by-step instructions here! Jul 27, 2008 · Sportster 883 1997 backfires on take off after idle and when cold Jump to Latest 32K views 34 replies 6 participants last post by Hosepipe Sep 3, 2015 M For discussing problems about your Sportster motorcycle that don't fit anywhere else. No luck. . What are the possible causes and fixes for the problems? Jan 7, 2004 · Hey folks happy new yr Question . 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. The bike has ultima single fire. I have a Street Glide Special, 2021 M8 114. She seems to idle all right, but more than 1/8 Sep 25, 2020 · Hello, I recently bought a 2017 Sportster Iron 883 and but about 2500 miles on it in the span of a couple of months. When a MAP sensor Jun 8, 2014 · why would my 1996 sportster misfire on rear cylinder ? - Harley Davidson XL 1200 C Sportster Custom question Mar 21, 2012 · 2006 Road King fuel injected, no modifications. F. While you don't want to run with the enrichener on all the time, the Sportster needs it for the first mile or so. I can twist the throttle and there is no misfire. com/motorcycle-ignition-coils-and-covers?utm_source=youtube&utm_medium=description&utm_campaign=How_to_Test_a_Har Jul 18, 2020 · I have a 2001 Ultra Classic with E. The carb was previously jetted by Harley Davidson for the pipes. Misfires Misfires are one of the most common and noticeable symptoms of a faulty Harley MAP sensor. 2008 Sportster Runs Irregularly or Misses (Troubleshooting) Check for one or more possible malfunctions if your Harley Sportster runs irregularly or misses: Spark plugs in bad condition or Mar 21, 2015 · Ok I'm new here. As an intricate part of the bike’s electrical system, a faulty voltage regulator can lead to problems and even stall-outs. 5turns from seated position (guidance from previous forum replies). Trouble codes are an essential tool when it comes to diagnosing issues with your motorcycle. I can rev full throttle with the clutch pulled in and it seems fine, but as far as riding goes I have to find that happy medium on the throttle and Apr 29, 2009 · Bike starts and idles great. 1K views 5 replies 6 participants last post by Hillsidecycleco May 23, 2018 Harley MAP sensor failure symptoms These are the most common symptoms of the Harley MAP sensor failure. Finally after digging and digging in the internet, and chasing a wiring diagram for Oct 31, 2023 · Say no more to those dastardly Harley Davidson sputtering issues! In this comprehensive overview, a seasoned mechanic walks you through it all. Sportster models often face ignition coil failures and clogged fuel injectors causing misfires and stalling. One of the Oct 19, 2023 · As soon as the third-party part or an upgrade is performed on the Harley, it starts behaving unpredictably. Sep 7, 2025 · If the spark plugs are worn out or not firing correctly, it can lead to misfires and sputtering. Took out all of my fuses and they had some corrosion so I cleaned them. 490 lift can cause low-RPM misfires due to altered valve timing. This winter, I redid the top end and got a different manifold and a CV carb. For discussing problems about your Sportster motorcycle that don't fit anywhere else. I've tried replacing the plugs. The enrichener is a whole separate circuit within the carburetor, that allows a rich mixture of gas and air into the intake. I replaced my rear cylinder head cause I couldn’t get a broken exhaust bolt out of it. Dec 18, 2014 · so ive had my sportster for about 2 years now, other then normal maintenance i added the stage 1 screaming eagle tune and ive added taller handlebars, got a switch kit from harley so no soldering or anything, crimped pins to the connectors. May 8, 2013 · Hey guys, First off the bike is an 06 883 custom. One of the Jan 22, 2024 · I'm new around here, and I'm still getting the hang of how to introduce myself better. Aug 7, 2022 · In this article, we are telling you about the most common Harley Davidson 1200 Sportster issues and recommended fixes. Took to HD dealership twice and last time I was told it was a true representation of a Harley Aug 18, 2017 · 2007 Sporty 1200L "misfire"/"cutting out" when hot and hit bumps. When I say I lose acceleration I mean it’s missing/not firing properly. 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. 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. Starts But Runs Irregularly or Misses Read expert Harley Davidson Sportster engine problem guides and repair how to's with photos and videos to help you maintain your bike engine. Common causes include a clogged fuel filter, dead battery, or faulty ignition system. I've personally adjusted the mixture screw as the mechanics failed to do this to 4. But, the problem is Jun 9, 2004 · 1999 Sportster 1200 Custom V & H Straight Shots (with baffles), S. Nov 11, 2025 · I have a 2010 sportster 883XL that loses spark on the front cylinder for a few seconds then picks up again. Replaced coil, wires and plugs with no luck. I can't get a hold of a new plug wire for a couple of days, but I checked the back plug wire with an ohm meter, and it looks like I have good resistance. Oct 31, 2023 · Say no more to those dastardly Harley Davidson sputtering issues! In this comprehensive overview, a seasoned mechanic walks you through it all. The problem is misfiring at constant speeds. 1. Air Kit, S. Check for worn spark plugs and replace if fouled. I'm just wondering what will my bike run like if its too rich? I'm worried about it being too lean so I'd rather it be a little rich but what are the performance Jul 25, 2025 · Hello all. Experiencing issues with your Harley refusing to start can be A backfire is a loud pop or bang sound that comes from your exhaust pipes when your motorcycle is running. I’ve replaced the carb, plugs, wires. Stock everything except straight pipes. Dirty/watery fuel (transparent fuel line, and using high grade premium fuel), points going bad (looked at points, no pitting). So, fasten your helmets, folks, because we’re about to rev up our knowledge on the signs of a faulty spark plug in a Harley-Davidson! All wires check out with resistance test. i was out riding and the bike started misfiring. 8mm Wires, Tach Jan 4, 2014 · I have a 2006 HD Sportster 883 that backfires or hiccups through the carb when you first give it some gas. Check the ignition timing advance mechanism for sticking or delayed return. 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. Floated out. 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. E Ignition Module, S. But, no change. I wish I could make the noise for you. Faulty Voltage Regulator One of the most common problems on a Harley-Davidson 883 is a faulty instrument voltage regulator, resulting in dim or trembling instrument clusters, failing displays, and inaccurate voltage readings. Trying to figure out what’s wrong is what I’m trying to do here. from harley davidson of Tucson and from time to time when I start to open the throttle slowly or quickly it pops back thru the carburator, and I also changed the spark plugs because it was missed firing at idle and low RPM, what could be the cause?? Unfortunately, there is still just the slightest misfire at low RPM / Low Throttle situations. Learn how to diagnose and fix a misfiring Porsche engine. Jun 20, 2012 · I have a friend that purchased a used 2005 Sportster from a HD dealer. Dec 8, 2022 · The sportster ran rough when I took possession with the issues being a very low idle rpm, constant blipping of the throttle to keep it lit, black smoke on idle, and an annoying carb cough (rich condition misfire to be specific). E Coil, DynoJet Kit, Accell 8. Only at low rpms though. Customer: Have a periodic backfire or miss on a 1997 1200 Harley Sportster. In this article, we’re going to delve into this topic and uncover the telltale signs that your spark plug may be on the fritz. This only happens at certain rpm's (no tachometer on bike) and higher, usually at speeds of 60mph or greater. long story short i ended up finding two holes in the tank fuel line. It has only 5k miles, so it hasn't been used much. 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. It gradually gets worse the longer it runs. Low-speed backfire and misfire after high-speed runs often indicate ignition timing or fuel delivery issues. It starts fine. I feel like I’ve done everything. I have tried new plugs, and tried different plug wires off of a friends Duece. Ive done a different air filter and my efi compensated, I don’t have personal experience with aftermarket pipes. May 8, 2023 · Posts Latest Activity Photos Pageof1 Filter new posts 201648Rider Master Mechanic Join Date:Jul 2016 Posts:291 Sportster/Buell Model:48 Sportster/Buell Year:2016 #1 For discussing problems about your Sportster motorcycle that don't fit anywhere else. Accelerating was great and it ran like a beast until 5th gear, 2900 rpm, 60 mph then it would Dec 12, 2023 · This comprehensive overview covers Harley Sportster problems, scattered across their respective model years with fixes and process included. Spot ignition coil issues early to keep your Harley running strong. checked spark, plugs did a compression May 11, 2024 · For 2007 and above SportstersHey all. Customer: My 2009 harley davidson sportster 1200 is misfiring on startup and will stall if attempted to ride Mechanic's Assistant: How many miles are on the bike? Is it a steady misfire? Or random? Customer: 25k it will start fine and then after 30 sec instantly start to miss Mechanic's Assistant: What is the make/model of your '09 bike? Customer: 1200 custom harley davidson Mechanic's Customer: My 05 Harley Sportster 1200 misfires when it is running at lower rpms after I run it for about 20 minutes. 9K views 4 replies 5 participants last post by SCHMIDTY Dec 15, 2011 8 Feb 22, 2024 · The Harley Davidson Sportster 1200 series is a popular line of motorcycles renowned for their classic design, formidable power, and the distinct Harley roar. It can hurt your ears if you’re in a confined space, or could start a fire as some backfires even emit flames. I have changed the plugs and the front jug plug is blacker and appears to be burning fine. At random intervals, it would start running on only one cylinder, then after 30 seconds to a minute or so, it would come good again, and run fine, for a while, before it decided to do it again. I have a 03 Duece. Random misfires under load on a 1990 Sportster can stem from ignition timing or fuel delivery issues. E. Owners also report frequent battery drainage. Blackburn_Adam Aug 18, 2017 2007 sporsterxl1200l sportster xl1200l B Maybe those aftermarket pipes have thrown the computer off. Only when Im at a light , and twist the throttle , or when I rap it off Apr 20, 2010 · My 2001 fatboy is only hitting on one cylinder. jpcycles. It will rerpeat this randomly. i have change the 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. If I slowly rev it up and down, it will clear up enough to be able to take off, and will run if I keep up the revs, but the instant I let it idle again, it will misfire till I get it revved up again and keep the revs up. Screamin04 Biker Join Date:Jun 2009 Posts:9 Sportster/Buell Model:XL1200C Sportster/Buell Year:2004 #6 23 November 2010, 13:32 Thanks for the help 67hat34c Biker Join Date:Sep 2008 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). My bike is a 1997 Dyna, it has just devloped a misfire and only runs on one cylinder if I rev it out over 4000 revs. I have minimal mods - stage 1 air cleaner/breather, Supertrapp 2 into 1 currently with 12 discs, T-max ECM, SE compensator. It has been gone thru several times and is in good shape at Dec 1, 2015 · During the past several hundred miles it has developed what I feel is a lean misfire in the rear cylinder, reminds me of the time I had a torn rear intake manifold boot. Posts Latest Activity Photos Page of 3 Filter Aug 24, 2010 · The intermittent misfire on my '03 Ultra ended up being a faulty FI wire. I rebuilt the carb due to a loss of fuel mileage and some popping through the carb on acceleration. I can be in I have a '05 sportster that misfires intermittent, almost exclusively at low revs especially when idling when the engine Dec 14, 2011 · 2006 sportster misfire Jump to Latest 3. 23,375 miles on the odometer. 2007 xl 1200 HD Sportster misfires 2007 HD xl 1200 misfires and the motor runs rough , backfiring and it kinda - Harley Davidson XL 1200 C Sportster Custom question May 9, 2013 · Well, that's not exactly correct. I recently purchased a 2002 EGlide EFI (FLHTCI). They provide Maybe those aftermarket pipes have thrown the computer off. A spark occurs at the correct time to create optimum engine power. A motorcycle exhaust backfire is an annoying and potentially dangerous problem to have. Apr 10, 2011 · Hi, I have had my engine totally rebuilt 12000km ago, by a reputable Harley service shop. Like I said, it spits and sputters on acceleration. If felt like it was choking out and would load up or miss but only at highway speeds. As per the owners manual, cool/cold start full enrichener for 2 miles, then 1/2 enrichener for 2 miles, then off. Usualy after riding for a short while and not at first. Owners of the Sportster 1200 have reported various problems, ranging from electrical malfunctions to the 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. Jul 6, 2011 · the misfire or sputter occurs at random. If you are experiencing no-starts, misfires, or poor acceleration, this article may help. Nov 20, 2010 · What is the procedure for checking for codes. Sent from my iPhone using Tapatalk Problems, advice and/or how tos for Sporster and Buell motorcycle carburators, Electronic Fuel Injection (EFI), Air Intake, Fuel and Exhaust. Misfires can occur when the engine fails to ignite the fuel-air mixture properly, resulting in a loss of power and performance. Had harleys since '1998 but this is only my second sportster. Too much throttle and it stalls altogether. Managed to make it home running on what felt like 1 cylinder on and off. 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. But if i rev it up slightly and hold throttle steady it starts to misfire badly. Jun 22, 2017 · I have 1977 Ironhead XLH it idles fine but getting up to speed it cuts out and backfires out the carb, spits and sputters. Hard throttle not too bad. What are the possible causes and fixes for the problems? Your new Harley Sportster have plenty of power, and you will obviously expect it to be easy to ride in all situations without annoying problems. 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. 256/. She has been hard to start, requiring continuous kicks to start even after warmup and riding. Need Help! 04 1200 Sportster is backfiring/misfiring on acceleration! I have a 04 Sporty and it recently started backfiring/popping (gunshot sounds) when accelerating. Dec 11, 2011 · At idle (cold and hot) she runs fine. Despite new plugs, wires, and a rebuilt carb, check the Dyna S ignition module for proper operation. This can be in the form of a misfire when starting the engine or backfiring. Hi there my 89 1200 started making a ticking noise along with a misfire i have replaced plugs wires coil electronic pick-up even the oil! Tore the bike down checked all the lifters,pushrods,cams,valves and everything looks good? Had a no spark issue, traced down everything, and nothing seemed to work. Check for weak or inconsistent spark at high RPMs, as ignition breakup often occurs above 5500 RPM. 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. In other words, it’s when the engine undergoes failure of ignition in Need Help! 04 1200 Sportster is backfiring/misfiring on acceleration! I have a 04 Sporty and it recently started backfiring/popping (gunshot sounds) when accelerating. but i have drained the tank and installed fresh gas from a different location. You are in the right place. Check the ignition coil for cracks or damage and test its resistance with a multimeter. The bike was giving him trouble spitting and sputting so he took it back for repairs. Feb 19, 2016 · Harley Davidson Sportster: Ignition Diagnostic Guide The ignition system ignites the air/fuel mixture inside the combustion chamber. Misfires with wet plugs on a Sportster 1200 conversion can stem from ignition coil or module failure despite spark presence. Additionally, problems with the air intake system can also cause sputtering. I wouldn't say the engine is bucking, its more of a stumbling feeling for a split second or so. Customer: My 05 Harley Sportster 1200 misfires when it is running at lower rpms after I run it for about 20 minutes. When I looked at it the First time the Carb was gummed up. Can't For all those that wanna talk about Ironhead Sportster Motorcycles Learn how to solve the issue of a misfiring Porsche engine and get back to enjoying your ride. Can't Jul 24, 2008 · I am Cruising down the road its flat about 45 in 4th gear the engine doesn't seem to be laboring, It feels like there is a slight misfire/stumble ,5thgear 50-55 same thing only more noticeable. I also unplugged all the sensors and injectors. Start by inspecting and replacing spark plugs if worn or fouled. It’s not really a single cylinder problem. Recently, I started getting misfires, backfires, and less fuel economy. some times on downshifting from 3-2 then rolling on the throttle. The bike had been sitting for awhile and the previous owner rode it a considerable distance with it back firing thru the carb. As you all know I have a 2000 883 . It ran great prior to any engine modifications but since the modifications I occasionally get a single misfire upon takeoff when the motor is cold. This article will guide you and help you diagnose as well as correct the many problems that can hinder your Sportster's engine performance. 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 Sep 9, 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. Good spark at the points. Unfortunately the very lean air/fuel mixture on the stock bike takes some of the joy out of the riding, because like all other modern fuel injected bikes, the Sportster suffers from misfire, weak idle, poor low speed running, and an unpleasant snatchy Jul 15, 2012 · Hello All, I have been chasing a problem for the last week or so that my 2010 ultra classic will misfire under light load when I am on the highway. The bike has ultima single fire May 16, 2013 · Hey fellas. got it home and started checking it out. When I first take off, the bike will misfire at low rpms. Once I completed the rebuild, the back firing stopped but now the rear cylinder 1989 Harley 883 Sportster Cam Upgrade Causes Misfire at Low RPM 883 Sportster often faces misfires and sputtering after camshaft upgrades or carburetor rejetting. The bike has a 103", 255 cams, TFI, de-catted headpipe and SE Fatshotz mufflers. Sep 14, 2021 · 2014 sportster misfire Jump to Latest 2. They told him the carb needed to be rejetted because it had Screaming I have a misfire on a 90 sportster-1200 conversion,new plugs mild andrews cams [490 lift] supertrapp pipe,rejetted carb - Have you had an issue where your Harley started to Misfire? Check out our Member Q&A for a solution to the problem. Regular maintenance, including checking and replacing spark plugs when needed, is vital to keep your carbureted Harley running smoothly. Do I have to rebuild the engine? 2014 Harley-Davidson Sportster Engine Misfire Information herein pertains to 2014 Harley-Davidson Sportster motorcycles that start but run irregularly or misses on XL 883 SuperLow, XL Nov 19, 2012 · I am Helping a friend who traded for an 02 883. I have adjusted the push rods cleaned the carb and emptied the tank and filled with fresh gas. It is intermittently missing on the rear cylinder Shop Ignition Coils - https://www. Seeming like it may be the ignition coil, I replaced that with this one : Drag Specialties Ignition Occasional Misfire At Take Off? I have a 2016 Iron 883 and I have it modified with a K&N heavy breather cone intake, V&H short shots and a V&H tuner. There's about 5 The rear jug misfire and it keeps fouling plugs on my 1991 Sportster. Jan 22, 2024 · I'm new around here, and I'm still getting the hang of how to introduce myself better. When it's warmed up, (normal temperature of operating -- After Feb 14, 2024 · Engine Misfires Engine misfires are a common problem that Harley Davidson 1200 Sportster owners may encounter. 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. May 12, 2016 · Disclaimer: I used the search button already. (in any gear). I bought it used at an auction so really dont know its history. I have an issue with my 2007 Ultra Classic with 44k on the odometer. This area is to discuss issues, problems and anything else unique to the 2004 and above Sportster motorcycles Jan 6, 2023 · 1. txzgvp pqncs vkxdb keybi rsas rmrkpl kmhj yccv ckvg ftqunj aoqem ckutz xun ikksw bek