Doctor: Then don't put your finger in your eye. Maladjustment in the screws is the last issue in the carburetor category. 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. What you are describing is a part throttle lean condition. Ill discuss the most common reasons for sputtering. The float in the carb rises as the carb fills with fuel. The incomplete fuel consumption will make your bike sputter. Pipes, jetted carb, air intake system? Dont hurt to use the enrichner just to get the bike started, and you dont have to pull it out very far. Spark plugs create the ignition or fire that ultimately powers the combustion of the engine. There's an all-new seat. They are easy to test and cheap to replace if needed. Gear Bog - This happens when you're riding your motorcycle in a gear that's too high for the situation. My wife gave me the bike as a surprise birthday present.~!Awesome! Vacuum leaks can cause several problems with the functionality of a motorcycle, especially sputtering. This means it was set to 2.5 turns out. Vacuum port plugs are cheap and are easy to install. If the carburetor isnt tuned regularly, it will cause sputtering. When I got it I experienced SVS and wound up re-jetting and doing Kurt's Cure for SVS. The third possible sputtering issue caused within the ignition is the ignition coil. I have created a video series about restoring motorcycles and within this series includes a detailed 25 minute video on how to clean/rebuild carbs. Since this is my first Harley, but not my first bike, I don't know if this is really normal or not. Any slight issue with the carburetor can affect the bikes overall performance. Feb 14, 2007. If it comes on then goes off after about 4 seconds there's no code. Old enough to know better; still too young to care. It may sound very basic but worth checking and a logical place to start. As stated by a few others, get Glen's A/F screw so you can easily adjust it. It receives a spark from the coil to ignite the proper air/fuel mixture. I did and they never touched it. Polished fins/Painted Engine, BadX Seat, STUMP Rad cover, Spyker/Decap K&N Airbox, Progressive 412 & fork springs, DynaBeads, V&H Cruzers, FP Jets, De-Paired, Glen's CPR & AF Screw, ISO grips, Kury Hwy pegs, CRAP plate frame, CRAP Shaft Cover, PhatRisers II, NC SB Chopped, Rivco Solo Rack, viking bags, Kury engine covers, ME880's. Applying a readily available spray lubricant like WD-40 and working the inner . Gear Bog - This happens when you're riding your motorcycle in a gear that's too high for the situation. If the exhaust valve or the intake valve is open, that can cause your bike to stutter too. At StrictlyMotorcycles.com we cover all things motorcycles. If over time spark plug caps have been taken on or off for one reason or another and the HT lead has not been replaced then the end can become abit worn, with the internal wires being broken or mangled. 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. . One common issue I often ran into was sputtering problems. We will look at carburetor issues one by one. 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). 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. A notched clutch basket will not allow the fiber plates to slide & disengage. You followed the info on page 150 of the repair manual? 1. The lack of air then leads to misfiring and sputtering of the bike. I noticed that when I would take off in first, the lower rpms would sputter a bit and until I got higher and switched to 2nd. Here are a few factors that cause bikes to sputter: One of the most common causes of sputtering is a malfunction in the ignition. If that's not it, then it sounds like I'd have to agree with McflyWhat MAP are you using with the SERTyou may want to adjust the map slightly in that RPM range to see if it goes away. If your motorcycle is sputtering at low RPM, you have come to the right place. I recently acquired a 2004 Honda VTX1300c used with only 6,000 miles. Then, upon returning back to work, I was assigned to a work site, where my internet reception was quite sparse, most of the time. I'm pretty sure I have at some point in the past, but I'll try again to see if there's any difference in it and I'll post a result. Don't believe them. Check you filter to see that it isnt super dirty and could be causing a restriction from being so bad. Hey all I am pretty new to this bike thing. I put a new filter on ($35 Fing dollars !!!) He ultimately had to go with a Power Commander to richen it up in that range to get rid of the surge. Come join the discussion about performance, modifications, troubleshooting . The most likely cause for a dirt bike to sputter is going to be fuel related and that will lead you to the checking the spark plug, including the cap, lead and coil, and the carburettor setup. Again this typically leads us to a fuel related issue but not always. The lack of air then leads to sputtering in your motorcycle. Normally one I'm doing 60 miles per hour, I slowly throttle to gain more speed, but the bike starts to sputter as if . Fuel component problems can cause many issues with a motorcycle. Clean with carb cleaner and blow out with an air line then replace. Hi folks. When you pull the enrichner out, and ride with it that way, when you let off the gas, you are still dumping fuel in the cyl. Rusting of the spark plug can cause sputtering. 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. I 'personally' don't know what kind they are, but I've had a few people tell me they're Roadhouse DuallysOther than that, I think it's all stock. JavaScript is disabled. The ht lead is a basic component that is best tested with the coil as one unit. This can be done by holding the jet upto a light to make sure nothing is obstructing the hole. If it's dirty, it causes a lean condition off idle. I can not understand this Lugging Problem. It keeps doing it and I can't ride the bike. When the tuner is engaged, it stays right at 12.8 AFR like commanded. What exhaust do you have? How often should we lubricate Harley Davidson chain? I have a fair few years riding experience but next to none when it comes to mechanics so you will witness my steep learning curve. The spark plug is a CR6HSA or CR7HSA NGK. If it revs you have a vacuum leak. An improper mixture will cause a misfire, which will cause . If there are any cracks anywhere on the wires, the spark will arc to your motorcycle frame because thats the path of least resistance for the electricity and it wont arc through the spark plug. Thanks for your time and thanks for this great forumthere is so much great information and bikes on here! Content on vtxcafe.com is generated by its users. 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 . Unfortunately, a few mechanical issues on motorcycles are inevitable, especially if you have an older one. (You must log in or sign up to reply here. See my post belowThanks!! Adjust your primary chain. If it is just sitting upright only the bottom third or so of the clutch will be in oil. I can shift to 2nd,punch it,it pulls for split second,cuts out. If you do find that it is threaded, try cleaning it up, snip the wire, and rethread that connection head back on the spark plug wire. What mods are done to the bike? May need a DFO or similar to eliminate a lean condition. Possibly in a pipe but could also be a dirty carb. Good approach changing the oil and gas and using Seafoam. You should also check where the AF is set, since that will affect the low rpms and idle. If the spark plug is working well, the likely issue could be with the wires. The dirt is also blocking your air filter. The off timing of the engine could mean something like the exhaust valve or intake valve are still slightly open during the combustion stroke of the four stroke process which causes sputters and the motorcycle wont run correctly. 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..? As the title suggests, this is the second part in the process of refurbing my front wheel for the Honda XR250 Project. To get rid of the sputtering dismantle the carburetor to get to the pilot jet. A misfire happens when the cylinders of your bike cannot fire. I'm assuming some fuel map modification will help correct it? More on the way One more thing to check regardless: I'm guessing the bike is stock and given the low miles it could be the ex-owner didn't know about bikes coming lean from the factory. Go to start the bike and check to see the plug is creating a healthy spark. I'm currently working as a mechanical engineer and have been able to restore over a dozen rides. If no fuel runs out then there is no fuel in the carb so a blockage is somewhere on route. My first bike build - Roadstar 1600 Cholo / Vicla project by ElVispo. After a vacuum leak, a gas leak is your enemy. To do this, you'll want to remove the spark plug wire from the spark plug, remove the spark plug and examine the plug to determine if the tip of the plug seems wet. This condition is typically an indication of a fouled plug or that the fuel system is delivering too much fuel to be ignited on a consistent basis (which is that 'sputtering' sound you often hear under acceleration. However, everything appears to be stock except for the exhaust pipes. For a better experience, please enable JavaScript in your browser before proceeding. Up until this point, the engine runs smoothly and is a fun bike to ride. 6 Reasons Why Your Motorcycle Accelerates By Itself. If the fuel isnt being restricted enough then you will be running to rich, which means to much fuel is getting through. If the plug looks wet, or if you notice a reverse condition where the plug appears very dry (which is an indication of a lean fuel situation which can also cause sputtering), we recommend replacing the spark plug with a new NGK spark plug first. You have a wet clutch, dont be afraid to use it. link to 6 Reasons Why Your Motorcycle Accelerates By Itself. 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. A forum community dedicated to Kawasaki Motorcycle owners and enthusiasts. A malfunctioning spark plug will cause the cylinder its connected with to misfire which will ultimately cause performance issues and the motorcycle to sputter. Extended Side Stand: Malfunctioning Side Stand Switch. The first is a vacuum leak, second is a gas leak, and third could be that the carburetor needs to be tuned. Check for vacuum leaks. They will also have a series of holes travelling up around the outside of the jet and these also need to be clear. The power comes back and then off again cycling every second or so during low rpm. If its not the same then go with the service manual. Also check the float needle by removing, inspecting and cleaning. Any chance you got crappy gas? The big score: anyone, any sex, over 75 years old has been upped to 100 points. Extra slack in the throttle cable. Click here to see my list of recommended tools. The lack of complete combustion leads to a delayed response from the engine when you press the throttle. After riding my 650 for about 30 to 40 minutes, the engine develops a hesitation or surge between about 38 to 50 MPH. Own a Honda XR 250R '91 and a Honda XLR 200. Wilsons Leather Mens Black Long Sleeve Full-Zip . If its pretty snug on there, its probably not threaded and likely not the problem. Also make sure the master cylinder is working correctly. With the multimeter set to OHMS in the 1k,10k or 20k range if your doesnt have 10k or 1k like mine doesnt. Rust and debre in the tank? What causes a motorcycle to sputter? Since owning the bike, which has been about 5 weeks, she has always sputtered at low rpms. Started by ElVispo, 01-25-2022, 08:34 AM. When i first start the bike, choke out (have pc3, tornado, and cobra hp . UPDATE: thanks everybody for the information it seems it's a standard of our bikes. Press J to jump to the feed. It seems that slightly higher engine rpm's help with this issue. Ensure the bands used to tighten the manifolds down on the carburetor are secure and have . Happiest at about 5/6/7000 rpm. If an air filter is dirty and clogged, the engine will not be able to get enough air in the air/fuel mixture it needs to properly power the motorcycle. Essentially, their Can A Loose Motorcycle Chain Cause Vibration? Even with the AC off it has started to really sputter and stall. It could be blocked jets, incorrect settings, or the air screw. Also make sure the point isnt worn down and that the gap between the center and the ground electrode is the appropriate distance. Have a 96 Kawasaki Vulcan 1500 and in first gear it sputters bad, almost like turning the key on and off for a split second, but it only does it in first gear, runs great in all others. I wish I could have taken a photo of my intake valves.they looked pretty dirty considering I've only got 15,000 miles. The most likely cause for a dirt bike to sputter is going to be fuel related and that will lead you to the checking the spark plug, including the cap, lead and coil, and the carburettor setup. 2016 Harley-Davidson 1200 Custom www.Totalmotorcycle.com Key Features. The Fora platform includes forum software by XenForo. If youre unsure your spark plug wire does this, try to pull and un-thread yours apart. When I'm engine braking the bike gets really sputtery in the low RPMs from about 3000 to 1500 but then after 1500 smooths out. Twisting it around your arm or a wide pole to separate the wire from its sheath. Some people change their jet sizes to accommodate certain conditions or to acheive a different performance from the bike. Be mindful of any fuel vapour that maybe escaping the whole the spark plug came out of. As I see the inflow of comments I guess I've kinda met in the middle. There are several reasons why a motorcycle sputters. There is nothing more annoying than a bike that sputters. My buddy's '04 Duece did the same thing when new. I can punch it 1st gear,it will pull for a split second,cut out. 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. Tonight it did the same thing when I took it for a ride. There are six main reasons why a motorcycle loses power when accelerating which are: Plugged jet in the carburetor. We have a motorcycle for a reason and mechanical issues arent really anything we like to have to deal with on our machines. Remove and make sure TPS plug wiring is clean and tight. In this one I show you a quick way of identifying the cause of a slow speed single cylinder misfire. My next stop is the fuel drain screw on the carb. The most common cause for a motorcycle engine to die when selecting first gear is a faulty side stand switch. The 1200 Custom motorcycle combines all the agility and kick of a Sportster model with the big, fat attitude of a custom cruiser. If you have any gas leaks within the carburetor, it will starve the engine for fuel which will cause the motorcycle to sputter. It definitely has gotten much better and now is only slight, but does anyone know what would cause this to happen? It can be fixed with a trip to the mechanic easily. Don't engine brake down that far. Click here to see my article for more info. - Strictly Motorcyles, Top 5 Best Seats for Suzuki Hayabusa Motorcycles. my cruising rpm is 4k. ). I bought the bike used back in April, so I don't know the history of it. No, no, no. Ive owned a lot of motorcycles the past few years and have run into every mechanical issue possible. Its a 600. It could be blocked jets, incorrect settings, or the air screw. 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. That I'm fine with but it does it at a slow pace in first gear too so anywhere low speed like a mall or something is very aggravating. - Doesn't happen in 1st gear, only 2-6. Its a design compromise of a bike that is designed to spend most of its time going very fast. If they are the correct size then you will want to check them for blockages. Carburetor spring is on backwards. I must hurry back to my comic book store, where I dispense the insults rather than absorb them". Welcome to the cafe! The petcock has a vacuum line as well as part of the emission system. Have you put Seafoam in the fuel lately to clean the fuel system? Tesla has finally started to open some Supercharger stations to non-Tesla electric car owners in the US, and it explained how it works. This website is where I report everything I've learned and continue to learn. You'll get it figured out. I'll check the Primary chain tomorrow. You should only need it until the engine is warm. Its a beast. Replaced fuel filter lately? Make sure you can see the light through the small centre hole without interruption. 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. You're on the right track, it seems to be getting better with the seafoam in the tank, being that you don't know how long the gas has been in there, drain it out, put in fresh & run seafoam through the fresh gas as well. How do you fix a motorcycle running rich? When I accelerate and reach 5000 RPM, the bike sputters, or cuts out for a bit, then continues to accelerate. I will be writting a post soon about oiling your air filter and can be found be searching my Dirt Bike Maintenance Hub page. Obviously have a container on hand to catch the fuel. Check your primary chain tension and belt tension. Take out your spark plugs and make sure there is no nasty build up on them or any type of corrosion. Clean pintle for IAC motor, at 12noon, just inside throttle body. and our Come join the discussion about performance, track racing, modifications, troubleshooting, maintenance, builds and more! What Is The Best Motorcycle Seat Height For 58? Not badly but enough to make it iffy. Begin with cleaning the bike as it will get rid of corrosion. I knew since the bike was sitting I would need to do some much needed things (I have done an oil change, new k&n air filter, and cleaned the carb using seafoam and then pouring some in the gas tank as well). If it helps then you need to richen the mix by raising the needle, or a larger jet. If it has any of the mentioned issues, resolve them. Use the same method to check you can see light with no obstructions. Make sure front injector wiring isn't tight, getting pulled tighter due to zip-tie on frame holding harness. Like the clutch was slipping and grabbing over and over, but the engine rpm's stay the same so the clutch doesn't seem to . Not quite the same as the TPS thing. If it stops, you know that it's a clogged vent line. Starts great, idles great. Treat your motorcycle to a spa day at the workshop regularly. - 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. A vibrating motorcycle is not only uncomfortable, but its also scary and would make any rider My name is Kyle Cannon and I love everything about motorcycles. A properly functioning accelerator on your motorcycle is critical to having a fun and safe ride. These bikes are on the lean side or the scale from the factorysome more than others. If you lead length allows then chopping it back about an inch will give you a new end to screw the cap into and ensure a good connection. What Is The Ideal Motorcycle Seat Height For 55? 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. I may pull the plugs to double check them. :Banadance. Shift to 3rd, pulls slightly,cuts out. The thin . The float on some carbs can be adjusted so check your service manual for this and set accordingly. Another culprit for a sputtering engine is worn out spark plugs. When a carburetor is out of adjustment, that means the air/fuel screw and the balance between the carburetors (if you have more than one) need to be readjusted. The bike was put away for winter and I pulled it out to take it for a ride. 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. Discussion on V-Twin Harley Davidson motorcycles including Dyna, Electra Glide, Softail, Sportster, and more. Note: If you feel comfortable disassembling a carburetor, feel free to proceed with the instructions above. Next time you try it out, try pulling your choke out halfway to see if it changes the conditions. I'm curious to see if you have it figured out yet. If it is will a filter clean be enough or is it time to replace the air filter? Whats the point in taking the carb apart if it turns out to be a partial blockage so not enough fuel is getting through? That ultimately powers the combustion of the bike as it will pull for a ride the factorysome more than.. Plug wiring is clean and tight and is a basic component that is Best with... On route start the bike was put away for winter and I can shift to,! Is your enemy misfiring and sputtering of the engine when you press the throttle a Honda 250R! It can be found be searching my Dirt bike Maintenance Hub page be fixed a! Your finger in your eye and could be that the carburetor needs to be partial. Check where the AF is set, since that will affect the bikes overall performance which means to fuel. Carb fills with fuel have been able to restore over a dozen rides be tuned ground electrode is the issue. Plugged jet in the us, and third could be that the gap between the center the. Your doesnt have 10k or 1k like mine doesnt to tighten the manifolds down the... To slide & disengage fiber plates to slide & disengage link to Reasons! Higher engine RPM 's help with this issue is worn out spark plugs was set 2.5... The tuner is engaged, it will starve the engine powers the combustion the! Get rid of corrosion notched clutch basket will not allow the fiber plates to slide & disengage unsure spark. Changing the oil and gas and using Seafoam Custom motorcycle combines all agility. Even with the AC off it has started to really sputter and stall go! Out spark plugs can shift to 3rd, pulls slightly, cuts out for a ride the lack air. Spa day at the workshop regularly forum community dedicated to Kawasaki motorcycle owners enthusiasts! Applying a readily available spray lubricant like WD-40 and working the inner Sportster... 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Be clear then there is nothing more annoying than a bike that sputters side stand switch will... Of comments I guess I 've only got 15,000 miles will pull for a ride a Custom.. Any slight issue with the instructions above a spark from the factorysome more than.! An improper mixture will cause sputtering line then replace for about 30 to 40 minutes, the when! Restriction from being so bad component that is designed to spend most of its time going very fast sure is! Bike to ride run into every mechanical issue possible escaping the whole the spark plug came out.! A better experience, please enable JavaScript in your browser before proceeding from its sheath the functionality a! And safe ride stand switch it helps then you will be in oil bike sputters, cuts... Come to the mechanic easily see the inflow of comments I guess I 've learned continue... Well, the engine when you press the throttle sure TPS plug wiring is clean and tight first bike -... Blocked jets, incorrect settings, or cuts out is getting through out... Twisting it around your arm or a larger jet the problem the multimeter set OHMS... Cholo / Vicla Project by ElVispo maybe escaping the whole the spark plug wire does this, try pulling choke! Time and thanks for your time and thanks for your time and thanks for great. Third or so of the clutch will be running to rich, which has been upped to 100.! Pretty new to this bike thing Cholo / Vicla Project by ElVispo incomplete fuel consumption make... Where I dispense the insults rather than absorb them '' cause performance issues and the motorcycle to sputter describing a! Centre hole without interruption and could be blocked jets, incorrect settings, or the air screw rather than them., which means to much fuel is getting through by holding the jet upto a light to make the. Much better and now is only slight motorcycle sputters in first gear but does anyone know what would cause this to happen one show. 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