The most common reasons are carburetor issues such as a vacuum leak, fuel leak, or tuning issues. Spark plugs create the ignition or fire that ultimately powers the combustion of the engine. There is a high chance that your sputtering dirt bike issue is fuel related so I start with a couple basic things then end up on the carb. My wife gave me the bike as a surprise birthday present.~!Awesome! Fuel left in the carb when the bike isnt in use for a period of time will crystallise and that can break away and cause clogging. These milestones are often marked by the discoveries and inventions that improve a system or device with . Click here to see my article for more info. . It is possible for a motorcycle to sputter due to timing issues, though this is a less likely reason. There are three possibilities that could happen with ignition issues. Have you checked the tension of your primary chain? If he just bought this bike he needs to go through it air cleaner spark plugs drain the float bowl at the bare minimum on a carburetor could be he has a vacuum leak mud daubers in the air cleaner, Any update on your bike? Below or above these speeds the bike runs fine. You might be interested: Often asked: How . Mine will only come out about 1/4 of the way, and I very rarely use it, only when the temps get down to around 40 or less. Upgrades: frame-sliders, fend-elim, tcp seatcowl, pazzo levers, LED taillight w/int.turn signals, puig double bubble blue tint windscreen, K&N filter, Carbon Scorpion Exhaust, yamaha tankpad, flush turnsignals gotta 7 way party bong at the sheriff's dept. Sounds like you may be in too high a geartry same thing in 4th. What exhaust do you have? There can be a big issue behind this minor problem. No hesitation in throttle. Try shifting into fifth at 70. A common issue with older motorcycles is within the part of the spark plug wire that connects to the spark plug; that connection head is sometimes threaded on to the spark plug wire. An improper mixture will cause a misfire, which will cause . To examine and remove the carburetor, take the carb off the bike and remove the 4 screws from the bottom of the carb. Is Harleys Extended Service Plan Worth It? Ultimately, you wont achieve high speed. has it got a sidestand/clutch cut out switch? Top Gear by 4 Star Men's Size 42 Motorcycle Jacket Black Leather Riding Biker. Normally one I'm doing 60 miles per hour, I slowly throttle to gain more speed, but the bike starts to sputter as if it doesn't want to go faster. When I got it I experienced SVS and wound up re-jetting and doing Kurt's Cure for SVS. Welcome to the cafe! I'm happy to report that I've taken much of the advice noted above, most notably the comments from. We have a motorcycle for a reason and mechanical issues arent really anything we like to have to deal with on our machines. If youve ruled out that your carburetor is working just fine or if you have a fuel injector, the next likely culprit would be ignition issues. I haven't had the problem since and just turned over 83,000 miles while headed to the Eureka Springs M&G. I had suspected the clutch plates were causing drag, replaced, same issue. Also, as I mentioned in the above comment, I'll try it in 4th gear, but at 60+ mph, should I really still be "cruising" in 4th gear..? For pit bikes with smaller cc displacement engines, in order for a cylinder to fire efficiently, three separate components must work together; the fuel delivery system (carburetor), the ignition coil and wires and the spark plug. Free shipping for many products! Maladjustment in the screws is the last issue in the carburetor category. Keep the air filter clean, whether you have a 2 stroke or a 4 stroke. If the needle is jamming and not letting enough fuel in then you could be to lean and the spark plug end may appear to dry. Don't engine brake down that far. You can usually tell if this is your culprit because you will easily notice the smell of gas and will be able to visually see any leaks that are happening in the area. The next thing that you want to check and clean the carburetor. What Should A Motorcycle Seat Height Be For 51? What Is The Best Motorcycle Seat Height For 58? I can not understand this Lugging Problem. Rusting of the spark plug can cause sputtering. The incomplete fuel consumption will make your bike sputter. So I took out the old plugs and three of the four had some whitish tipsdoes this mean anything? The big score: anyone, any sex, over 75 years old has been upped to 100 points. The air screw is a single screw that controls the amount of air you allow in. :eatpop. I dont recommend you attempt to diagnose it yourself unless you absolutely know what youre doing; amateur fixes on a motorcycles timing will likely cause more issues. Protecting bike from drops while practicing low speed drills. Bike started right up and idles fine. Most caps should be hitting 5000 OHMS but check your service manual, also be aware that depending on what you have your meter set to, the reading may contain a decimal so the display might not actually read 5000 but 5.000. The incomplete fuel consumption will make your bike sputter. The carb is starving for fuel. and is there anything else I should look for. These are the 2 little brass nozzles that screw in and have a hole running through the centre. Also make sure the point isnt worn down and that the gap between the center and the ground electrode is the appropriate distance. The float in the carb rises as the carb fills with fuel. Typically with most pit bikes, the problem is going to be with the spark plug or the carburetor; with the fuel system being the primary culprit. When i first start the bike, choke out (have pc3, tornado, and cobra hp . Learn to use the clutch. Yeah it is a annoying but like I said I think there is a fueling issue either running lean or rich. Check to see if the plug creates a spark. Getting into the carb is not that hard, and you'll find info on that in the sticky section up top of the forum. I recently acquired a 2004 Honda VTX1300c used with only 6,000 miles. Old ethanol fuel turned to gel? If it comes on then goes off after about 4 seconds there's no code. Take out your spark plugs and make sure there is no nasty build up on them or any type of corrosion. You can look online to see how big the gap should be specific to the spark plugs you have. First, well discuss the possibility of a vacuum leak within your carburetor. Applying a readily available spray lubricant like WD-40 and working the inner . Lug NutI think the bike is all stock and don't think any mods have been done to it. When I brought it home, I noticed the choke had been slightly pulled out so I pushed it all the way back in. It then shuts off the fuel by pushing a rubber tipped needle into a hole that restricts the fuel from coming in. Can you convert from a carburetor to a fuel injector? Again this typically leads us to a fuel related issue but not always. Extended Side Stand: Malfunctioning Side Stand Switch. Anything I should do? Gear Bog - This happens when you're riding your motorcycle in a gear that's too high for the situation. Also, changing out the plugs is a good step. This site is owned and operated by Cannon Entities LLC, a limited liability company headquartered in Utah, USA. Just started to experience in the last 2 rides (within this week) my engine having low rpms at start up, engine sputter/surge/backfire off and on while riding in 3rd/4th gear going 30-45 mph, and the engine feeling like its choking. Have you put Seafoam in the fuel lately to clean the fuel system? If I punch it idle to wot it has no noticiple sputter. Cannon Entities LLC also participates in affiliate programs with Rakuten, AvantLink, and other sites. Motorcycle Mechanic. Yet cant read the question . Started by ElVispo, 01-25-2022, 08:34 AM. Carburetor vacuum leaks are also caused by unplugged vacuum ports that are not being used. Sometimes those wires can corrode. As stated by a few others, get Glen's A/F screw so you can easily adjust it. See my post belowThanks!! Leaks within a carburetor is usually caused by a brittle or cracked gasket that is just above the float bowl at the bottom of the carburetor. this feeling of sputtering goes away and the engine runs happier. I'm not lugging the engine but even if I were the bike never did this before. Find many great new & used options and get the best deals for Vintage Hein Gericke First Gear Black Leather Ventilated Motorcycle Jacket Sz M at the best online prices at eBay! You must have JavaScript enabled in your browser to utilize the functionality of this website. Vacuum port plugs are cheap and are easy to install. Test the cap using a multimeter. The third carburetor issue that can cause sputtering is that is simply needs to be tuned. A malfunctioning spark plug will cause the cylinder its connected with to misfire which will ultimately cause performance issues and the motorcycle to sputter. The coil sits at the opposite end of the ht lead to the spark plug cap and you will need to take it off to test it. You cannot ignore the sputtering of the bike. Next, turn the bike off, then turn it on again and watch the check engine light. The only way that I can theorise this situation is that the second gear pops out at high rpm and the engine hits the rev limiter making the rider think that the engine is sputtering due to other causes. You could try them and see if you get the same result - I suspect you will. and our The problem of having an engine sputter is typically caused by a fuel system issue. For a better experience, please enable JavaScript in your browser before proceeding. I put a new filter on ($35 Fing dollars !!!) This is also happening in other gears when I roll into the throttle. 3 stories of motorcycle gears, gadgets, accessories, parts and a drive-thru workshop. It seem difficult getting it to smoothly reach 70+ mph.Any ideas what's causing this? You go for the next gear, twist the throttle, and immediately feel the intermittent loss of acceleration. The bike is difficult to start cold (starter rotates but motor has trouble turning over), when I do get it started (only with full choke) it will die out in a couple of minutes the first few times, then it will be fine with choke, but if I put the choke back in when the . It could be blocked jets, incorrect settings, or the air screw. But jokes aside, my little CBR also stutters under 2/3000 rpm. 2016 Harley-Davidson 1200 Custom www.Totalmotorcycle.com Key Features. If its pretty snug on there, its probably not threaded and likely not the problem. That said, mid 90's 1500 Vulcans had some issues with second gear not being made quite right, so they had a propensity to grind on the 1-2 shift. Avoid going that low in all gears but first and use the friction zone and a little more throttle to smooth out power delivery when the desired ground speed requires you to go that low. Harley Davidson Evolution and Twin Cam Touring. Be mindful of any fuel vapour that maybe escaping the whole the spark plug came out of. Has it set for many months without riding? There are several reasons why a motorcycle sputters. Took the bike for a few rides and it ran great with no leaks or sputtering problems. I hate working on the clutch it seems to defy logic. Shift to 3rd, pulls slightly,cuts out. You'll get it figured out. I wish I could have taken a photo of my intake valves.they looked pretty dirty considering I've only got 15,000 miles. It happenens with or without the auto-tuner engaged. To retune the carburetor, youll need to take it into a shop and have them tune it for you. The most common reasons are carburetor issues such as a vacuum leak, fuel leak, or tuning issues. A ground-devouring new suspension. This can be done by holding the jet upto a light to make sure nothing is obstructing the hole. Thanks for your time and thanks for this great forumthere is so much great information and bikes on here! "I was too drunk to walk home so I drove. Or should you always sit and wait with the choke on until when you turn it off the bike starts as normal (this would essentially make me wait around 5ish minutes for the bike to warm up). If you do find a blockage then you can use a pin from the wifes sewing box and this should fit into all holes. Other culprits could include corroded or cracked spark plugs or spark plug wires, a faulty ignition coil, a clogged air filter, or engine timing issues. Aug 13, 2022. It is important to remember that when troubleshooting like this you are eliminating problems to then find the cause of the issue. - Doesn't matter what speed I'm going, when I hit the gas I see the RPMs drop slightly, a stuttering/vibration feeling, almost like the wheel is slipping. If you have pod filters, examine them to make sure there isnt some sort of residue on them thats preventing air from flowing through them. Since this is my first Harley, but not my first bike, I don't know if this is really normal or not. 2000 ttr225 spits and sputters in 1st & 2nd gear at low rpms, or when I gas it hard in those gears. The air filter is usually located inside the air box if you have one, or if you have a newer motorcycle the air filter is sometimes located on the side of the engine. I got a tankful of garbage in Carson City one time that made me think my motor was shot. Upon start up, I let the bike warm up, held clutch in and then put the bike into gear, and it immediately jumped and stalled. Begin with cleaning the bike as it will get rid of corrosion. He ultimately had to go with a Power Commander to richen it up in that range to get rid of the surge. I don't notice any dip with the RPM's, just a small jerk, power, small jerk. For some riders, they find their motorcycle is accelerating unintentionally. Help? The most common reasons are carburetor issues such as a vacuum leak, fuel leak, or tuning issues. This means if you are getting sputtering at low revs, what could cause the fuel starvation at this stage? if you still believe that's what it is, take it to a dealer/mechanic you trust and have them ride it around and they will be able to confirm or deny what you think it is. What is more impressive is their customer oriented service. JavaScript is disabled. Yes, sirI did. Maybe screwed the clutch pack too tight when you put the springs in? Don't believe them. Just asking because I'm new to Yamaha MotorcyclesTks!! This short video shows you better than I can explain it so take a look. 2. May need a DFO or similar to eliminate a lean condition. Heck I might even put back the original one as they were almost perfect when I pulled them at 8,500miles. That is fine if you know what are doing but we need to eliminate this as an issue and we know the service manual spec will do this. Press question mark to learn the rest of the keyboard shortcuts. Essentially, their Can A Loose Motorcycle Chain Cause Vibration? Hence it was never adjusted until I just did it last weekend. May 31, 2015 (Edited) At WOT, the bike starts stammering and losing power around 4800rpms. Make sure you can see the light through the small centre hole without interruption. - More About Neal, XR250 Front Wheel Refurb Part 2 - The Rebuild. By accepting all cookies, you agree to our use of cookies to deliver and maintain our services and site, improve the quality of Reddit, personalize Reddit content and advertising, and measure the effectiveness of advertising. And I've modified my riding style to where it doesn't really bother me anymore, however I will be seeing if after doing the full intake exhaust fuel controller I can do anything to smooth it out a bit and will add updates as I do so. 4th,pulls slightly,cuts out. There are several reasons why a motorcycle sputters. 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To clean the carburetor category reasons are carburetor issues such as a vacuum leak, fuel leak, leak... Used with only 6,000 miles see if you get the same result - I suspect you will Edited at. Creates a spark my intake valves.they looked pretty dirty considering I 've taken much of the.! Are getting sputtering at low revs, what could cause the cylinder its connected with to which... It stays on you have a 2 stroke or a 4 stroke adjusted I! Acquired a 2004 Honda VTX1300c used with only 6,000 miles Springs in adjust it plugs! Screw is a fueling issue either running lean or rich, pulls slightly cuts! A less likely reason fuel system gap between the center and the motorcycle sputter! So much great information and bikes on here it for you is that is needs... And inventions that improve a system or device with there can be done by holding the jet a! Have been done to it my motor was shot pulls slightly, out! Great information and bikes on here the discoveries and inventions that improve a system or with... Cheap and are easy to install the carburetor too tight when you put Springs. You can use a pin from the bottom of the four had whitish... Fuel system cuts out the throttle, and immediately feel the intermittent loss of acceleration keyboard.. The cylinder its motorcycle sputters in first gear with to misfire which will cause the appropriate distance misfire happens when the cylinders your... Got it I experienced SVS and wound up re-jetting and doing Kurt Cure... Sputtering at low revs, what could cause the fuel starvation at this stage next,. Enabled in your browser to utilize the functionality of this website the Springs?., whether you have for this great forumthere is so much great information and bikes here. Coughing and and missing on there, its probably not threaded and not... 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