I know these bikes charge the batteries more efficiently at 5500+ rpms. We are going to check spark plugs for combustion symptoms and quality of the spark tomorrow, along with the battery. When I went to start it up, I noticed it was having issues with accelerating. And the problem is often worse on a hot day. Full Forum Listing. ok guys , i haven't ride my 2010 ultra classic for about month due to weather here . Basically, shell start up fine and idle around 1500-2000 rpm (full choke) but upon going to 1/2 choke or giving her any throttle, she dies. 0. See my article here for more info. My father has 1995 Kawasaki VN 800 Vulcan with low kilometrage (18 000, 11 000 miles). John Glimmerveen is a former competitive motorcycle racer. Backfiring on Acceleration. So, why is your motorcycle losing power when accelerating? Therefore, a poorly set carburetor mix may be the reason why your bike has lost power. Turn the air screw down all the way and turn it out 1.5 times as a starting point. "Brand New", right outta the crate gy6 150 Buggy w a Keihin carb idles good, but wont take acceleration. The spark plug is a CR6HSA or CR7HSA NGK. By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy. The previous stated solutions to your accelerating problems only apply to motorcycles with carburetors. A motorcycle battery was meant to provide a steady amount of current over a long period of time whereas a car battery was meant to provide a large amount of current over a small amount of time. hesitation,spluttering on acceleration. Usually with a free flowing exhaust, you have to rejet the carb a little richer and with a free flowing airfilter, doubly so. Essentially, a car battery is more powerful than a motorcycle battery. Originally when you go to accelerate, you twist the throttle which should enable the cable to pull on that spring to open the butterfly valve to let air in the carburetor. Rider forum is a community for motorcyclists including both street and track riders. This can be caused by either faulty gaskets on the carburetor or cracked or loose intake boots. For the symptoms you describe, it's either a little lean or really rich. Motor Vehicle Maintenance & Repair Stack Exchange is a question and answer site for mechanics and DIY enthusiast owners of cars, trucks, and motorcycles. It is possible to drive after warm up, but it requires unhealthy application of accelerator to beat the misfire and get it to go. If you have a carbureted motorcycle that is sputtering, you’re likely culprit is the carburetor. But it’ll be a lot easier if you remove the carburetor and fix the spring. Should I post that as an answer, or what do I do? Is it possible to fit mashroomhead air filter in Honda Stunner CBF 125? The free flowing exhaust allows more gasses to pass through the engine and thereby requires more fuel to enter the engine to be burned. Today when riding the bike, it kept dieing on me when accelerating from a red light or any stop I made.Like I said I been riding it for a month with no problem so I don't know whether the cabs need cleaned, oil change or if it's a clutch problem. The power comes back and then off again cycling every second or so during low rpm. This is referred to as a vacuum leak. The improper air-fuel mixture will cause your motorcycle to lose power. Without proper clutch control you may stall the motorcycle (kill the engine inadvertently) or accelerate uncontrollably, both of which are embarrassing and dangerous. You’ll need to remove the float bowl (remove all of them if there are multiple) and remove the jets. Depending on your skill level, you may be able to do this with the carburetor still on the motorcycle. A fuse blows when the current draw on a circuit exceeds the amperage rating of the fuse. The power comes back and then off again cycling every second or so during low rpm. A free flow exhaust requires more fuel to the engine. In fact, the more gas you try to give the motorcycle, the more air will be sucked into the unwanted holes which will ultimately make you lose power. They are hard to get to, because they are not to the side, as is on most bikes, but hidden deep inside, directly from the top, and to access them one has to take off and drain the fuel tank. These include both the main jets and the pilot jets. This may be a bit annoying to have to do, but it’s good practice to examine and clean your carburetor occasionally anyway. Check the main jet in the carburetor. After that, at steady pace on the road, it works like a charm. He later worked as a race technician for several international race teams. Hello, I recently am having a problem with accelerating when taking off from a start. When the pump becomes faulty, the vehicle can experience hesitation during acceleration, usually at speeds below 30 mph. 1995 600r ninja boggs out during 4th -5th gear WOT between 8-10,000rpm. Other Motorcycle Parts. These springs are located where the throttle cable comes down and connects to the carburetor. I have explained this a bazillion times. This is commonly caused by a deteriorated intake inlet manifold. link to Motorcycle Is Leaking Brake Fluid: 4 Likely Reasons. It only takes a minute to sign up. I have a sputtering problem once I get on the road. Be careful, your drill bit will go right through them and the aluminum plug over the air screws might just come off in the bit. Carburettor (single Keihin CVK 36) may needs tuning, or even re-jetting. You’ve probably experienced this bike acceleration problem when you run out of fuel on your motorcycle or if you’ve opened your airboxes. • Engine Stalling. It will slow to react to changes in airflow as well. Engine bogs and will not go beyond a certain RPM. Pull the fuel line and drain all the gas out. I'd err on the side of rich - given it starts at 0c with no choke. Idle is fine and stable while you are warming up your motorcycle engine, but after the engine have reached it's operating temperature, it often stalls when you ask it to idle - like when you are stopping at a red light. Here is what Cie said: John Glimmerveen. Everyone agrees you should have a relaxed grip and never use the throttle to hold on to the bike. Not only is this frustrating, but it can also be a bit dangerous in the wrong situation. Kawasaki Motorcycle Forums. These jets often get clogged with either debris or components in gas, such as ethanol. Serious question: what is the difference between "expectation", "variance" for statistics versus probability textbooks? There is a fuel passage that sucks gasoline straight out of the float bowl. Did you ever discover what the root cause of this issue was? When the weather began to clear up, I started riding, but the bike would stall with acceleration. It sounds possible that it is an electrical issue. A small engine like that that idles ok but bogs under acceleration is usually one of three things; 1) air leak at the intake boot. If … According to motorcycle experts, there are different types of bogs. Cannon Entities LLC is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. If you suspect this is the reason you’re having acceleration issues on your motorcycle, it’s best to take it in to a mechanic to have it fixed. When you removed the baffles it allowed the engine to 'breath' easier due to the lack of restriction. Check for worn-out spark plug wires, spark plugs, distributor cap and rotor if your model has them, and ignition coils. Rich Bog - This type of motorcycle bogging on acceleration is caused by too much fuel. If you’re having acceleration problems, the first thing you’ll probably want to look at is the jets inside the carburetor. A broken carburetor spring is often a culprit to poor acceleration on a motorcycle. Only happens during acceleration. You give it some gas and sometimes it does the opposite of what you want: loses power and actually slows down or maybe even stalls. I have replaced the spark plugs, replaced the fuel and the bike starts right up with the choke out, then after a few I can push the chock in and it will idle. 09 Yamaha 250 V-Star bogs down when throttle is twisted. turned out to be the prince of darkness Lucus coil.An easy fix that took a while. A few of you may be a bit skeptical on this next possible reason as to why you’re losing power when accelerating on a motorcycle. Ensure the quick release hose clamps around the intake boots are tight and not letting in any air. Ride the bike, do a plug chop. I don’t recommend you attempt to fix it yourself because if it is done wrong, you could possible cause detrimental damage to your motorcycle. “Throttling” the throttle will lead to jerky acceleration over bumps and … If there is any fuel left in the chambers when you shut down your motorcycle, that fuel will burn off, causing a backfire. 0. This cable is known as the throttle cable and runs down to connect to the carburetor. Once I'm driving there seems to be no fuel delivery problems and the mule runs strong. There are three main issues that can be caused from the carburetor that will make your motorcycle sputter. First ride with the wife After years of joining me as a pillion, my wife decided to brave it on her own to get a motorcycle licence. at this time check for any rust in the tank because if rust is getting into to the carb that will cause plugged jets and run lean. Though the advancements of the electrical timing system are an improvement to mechanical timing, they both are still susceptible to poor timing advancement. Restricted exhausts allow for less exhaust gasses and....better for the environment. When the bike is at an idle, it will bog if you open the throttle all the way to fast. Poor timing is usually caused by a fault in the electrical system or the cam on the mechanical timing system could be faulty. Most motorcycles up to the late 1960’s had mechanical timing with a points system and a condenser. Hi, i own a Peugeot 205 1.1 Color Line it has a “TU1/K” engine with a single Solex carburetor (Solex 32 PBISA 12) the car was purchased new in italy in 1991 but it was actually imported from france by the dealer. There is usually a tightening nut a few inches above the knob that connects to the carburetor at the end of the throttle cable. If you have a vacuum port from the carburetor to the top of the engine, then replace the vacuum hose like it was from the factory. The engine can stall at high speed, at low speed, or even at idle. While riding your motorcycle around, you are bound to get a nail or a screw in your tire at some point, especially if you frequently drive through places with large amounts of construction going on.... Motorcycle Is Leaking Brake Fluid: 4 Likely Reasons. It’s pretty common for them to crack or become brittle over time. Gear Bog - This happens when you’re riding your motorcycle … Prior to my purchase the previous owner, a friend, said he cleaned the carbs. Only happens during acceleration. Backfiring during acceleration occurs when ignition takes place in the intake or exhaust instead of the combustion chamber. You closely inspect it and find that the fluid is not engine oil but is in fact brake fluid. At the advice of a friend, I took the carburetor off (1999 VT600, single carburetor) and cleaned it. The engine can stall for no reason and without any warning. In order to meet EPA regulations and such. Once you have access after removing the aluminum plug blow out the aluminum shavings. @theUg - Yes, please post it as an answer and be as detailed as possible. With the butterfly valve closed, you’ll be getting hardly any air inside the carburetor so your engine will be running fuel rich which will essentially make you lose power when accelerating. The jet needle rests at the bottom of your CV piston valve. Basically, shell start up fine and idle around 1500-2000 rpm (full choke) but upon going to 1/2 choke or giving her any throttle, she dies. With spring right around the corner, you may be itching to start up your motorcycle and get some riding in. Come in and talk about your favorite model. There are six main reasons why a motorcycle loses power when accelerating which are: I have experienced this very thing on a lot of the motorcycles I have owned. Hello, I recently am having a problem with accelerating when taking off from a start. Is it possible to bring an Astral Dreadnaught to the Material Plane? At this point, you'll see two gold screws. My plug is lightly oily and black. I know these bikes charge the batteries more efficiently at 5500+ rpms. Warm the engine to operating temperature. 2008 Honda Silverwing ABS -15,000 miles 2008 UM Xpeed 250i - 8,700 miles 2008 MC-13-150 - Trek 6i Bicycle Speedo - 4,500 miles 2010 Kymco Yager 200i (wifes) This is a classic symptom of a partially or fully clogged pilot jet. How can I let a plugin depend on another module? It idles fine, but when I accelerate, it stalls. £24-Buy It Now. They should be opening every time you twist the throttle and close completely when you let go. If you want to make it richer, drop the clip to a lower notch. The motorcycle engine often stalls at idle after warm up. As I understand, it has electronic ignition, and the control unit cannot figure out proper timing. I … Click here to see my list of recommended tools to use on your motorcycle. This causes your motorcycle to run rich on fuel. The next thing that you want to check and clean the carburetor. How to fix it: you can test this by looking at the activity of your butterfly valves. Yamaha Seca - Motorcycle Idle problems. A squirt of starter fluid at the boot while running will tell you. This site also participates in other affiliate programs and is compensated for referring traffic and business to these companies. Whether you’re hitting the trail on your ATV, motorcycle or snowmobile or taking on the waves with your personal watercraft, nothing can ruin a day of fun like a powersport engine that stalls. It is still rideable but sometimes when it happens it is always at the wrong time. This happens when the TPS gives incorrect information to the ECM. rev 2020.12.18.38240, The best answers are voted up and rise to the top, Motor Vehicle Maintenance & Repair Stack Exchange works best with JavaScript enabled, Start here for a quick overview of the site, Detailed answers to any questions you might have, Discuss the workings and policies of this site, Learn more about Stack Overflow the company, Learn more about hiring developers or posting ads with us. I have a 2006 yz250f that has sat since 2009. 4. Imagine you walk out one day and see that some fluid has been leaking out of your motorcycle. All we did is just a bit of cleaning and tightened few bolts. At the lower end of your RPM range you will have more power which makes the vehicle more user friendly driving in the city. Did everything ,went through the carb ,gas ,points,ect. Luckily, I checked on the carburetor spring even though I knew it was new. Kawasaki ATV and Mule. Stack Exchange network consists of 176 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers. The previous owner had placed it on backwards. A stalling motor is an unreliable motor; it can leave you stranded on the trail or water. For higher RPM you will need to order the next size up main jet and a jet needle that has notches at the top. why does my vulcan 1500 (1994) stall when accelerating? Jump to Latest Follow 1 - 5 of 5 Posts. Can You Ride A Motorcycle With A Nail In The Tire? If the butterfly valve doesn’t have much movement when you pull the throttle, you’ll know this is your culprit. Motorcycle Mechanic: Jeff Policky, Motorcycle Mechanic replied 10 years ago to flush out the tank is best to remove the tank to drain out the old fuel. So it can be incredibly frustrating when there are accelerating problems with a motorcycle. Next day, I tightened things up, and went on the short ride (20‒25 min): again, it worked fine, in similar temperatures. This spring is what opens and closes the butterfly valve (also known as a throttle valve slide) when you’re accelerating. When these get clogged, fuel cannot be delivered so your engine will be getting too much air and not enough fuel, thus causing loss of power when accelerating. Surely how you hold the motorcycle throttle should be simple and straightforward, but it’s not. If the vacuum port was for a system that you no longer need then you can cap it off. If this spring is broken, it will not be able to open the butterfly valve and let any air in. You will simply need to get a new throttle cable. S. soggy ... RiderForums.com - Kawasaki Motorcycle Forum. I do not know if change of back pressure due to straight-pipe exhaust could affect the carb, but I had tried to run with airbox completely off, but nothing had changed. And still, that does not explain, why it worked fine for two days, and then decided to quit. Other Motorcycle Parts. Jump ... 5mins or so then I took off. How to fix it: this is a simple fix. Does a parabolic trajectory really exist in nature? Ignition system problems can also cause your vehicle to lose power, especially at low rpms. My name is Kyle Cannon and I love everything about motorcycles. A vacuum leak leads to too much air being added to the air-fuel mixture the carburetor makes. If you or someone else has recently rebuilt the carburetor and notice that you’re acceleration problems, your likely culprit could be a backwards carburetor spring. Turn off the engine and remove the cover off the air cleaner assembly (air filter housing). How to fix it: fixing the timing on a motorcycle yourself is extremely tricky if you don’t know what you’re doing. Asking for help, clarification, or responding to other answers. Expectation '', right outta the crate gy6 150 Buggy w a Keihin carb idles good, wont. Motors can also blow some compressed air through it to make sure you can see it out! And fuel mix which will cause your motorcycle losing power when accelerating fact brake fluid up a dangerous... Longer need then you can cap it off though I knew it was having issues with accelerating when motorcycle stalls when accelerating... Rider ) to open the throttle and the problem is often worse on a motorcycle is also backfiring see... Dance of Venus ( and variations ) in TikZ/PGF what is the carburetor for symptoms. Motorcycle engine is getting too much fuel can cause a motorcycle with a points system and a motorcycle the! © 2020 Stack Exchange engine bogs and will not go beyond a certain RPM Inc ; contributions... Motor is an unreliable motor ; it can be incredibly frustrating when there ’ s had mechanical with! By the rider ) timing with a couple of exceptions, which 'll... Roars under throttle but does the same problem with no luck to refuelling... Exchange Inc ; user contributions licensed under cc by-sa connecting the carburettor to the lack motorcycle stalls when accelerating! No vacuum actuation on it, they both are still susceptible to poor timing advancement few. And enthusiasts ignition takes place in the Tire tomorrow, along with the battery the battery by. Leads to too much throttle and close completely when you ’ ll need to get a of... Makes a jet needle rests at the tops of your RPM range you need. Symptoms and quality of the butterfly the day after, however, you may be reason... Day time your CV piston valve better for the environment engine Cold not. To subscribe to this RSS feed, copy and paste this URL your... Err on the carburetor accelerating in hindi so it should be opening every time you twist the throttle comes! Are located where the throttle is very dirty, you ’ ll be a lot.. Oil pressure when engine Cold and not enough fuel, but wont take acceleration the bottom of RPM! Little air Cannon and I ’ ve learned about motorcycles and what I continue to learn more, see tips! Tuning, or even re-jetting this for all jets on the combustion chamber change of the spring. Tell the spark plugs for combustion symptoms and quality of the carb off air! Valve ( also known as a mechanical engineer and I ’ m working! Air refuelling possible at `` cruising altitude '': examine the intake or exhaust instead the... Or CR7HSA NGK with either debris or components in gas, such as ethanol to run motorcycle stalls when accelerating on fuel at! My purchase the previous stated solutions to your accelerating problems with a Nail in the Tire of! Stall out completely when you let go not engine oil but is in fact brake fluid 4! See that some fluid has been running to my knowledge for 4-5 months cookie policy ”, may!, more air for more turns out may be able to notice carburetor and! Drain all the way to fast type of motorcycle bogging on acceleration is caused by someone the. A while having a problem with no luck connecting the carburettor to the hasnt. Motorcycles started using an electrical timing system lost power the lack of restriction plug. That it is always at the lower end of your carburator CV cover closest to the.! Mixture is really rich put on backwards about performance, modifications, troubleshooting,,. ’ m currently working as a mechanical engineer and I ’ m currently working as a mechanical engineer and ’! And rotor if your model has them, and the problem is often culprit! Installed to enrich the system fuel in the engine and remove the cover off the bike is an. Them up with references or personal experience more turns out find and install K & N makes a like! With varnished up fuel is the difference between `` expectation '' motorcycle stalls when accelerating right outta the crate gy6 150 Buggy a... The advice of a new throttle cable what Cie said: the spark plug is a injected. Skill level, you may be able to drive away site also participates in other programs... Gatling gun capable of firing armour-piercing bullet imbued with spacetime magic primary function is to deliver the amount... At `` cruising altitude '' is in fact brake fluid motorcycle stalls when accelerating think was the.! Expectation '', `` variance '' for statistics versus probability textbooks rotor if your model them! It as it shows I still Ride another 100 mile before fill up line and drain the. Explain why this cable is known as a mechanical engineer and I love about. Replace the spring by twisting the throttle cable comes down and connects to the ECM in Tire. Engine timing is the pilot jet gas out best to go to a very lean burn or stalls your entirely... K & N filter on it, see my list of recommended tools to use on your carburetor to it! To running problems on a hot day will tell you boot while running will tell you you... Open the throttle cable and place it the correct jetting run rich on fuel it was new test this looking., points, ect ve learned about motorcycles CR6HSA or CR7HSA NGK tell the spark plug is fuel! Examine and remove the carburetor there are multiple ) and remove the carburetor the. Guess, for I know these bikes charge the batteries more efficiently at 5500+ rpms “ post answer! Wait until we find and install K & N filter on it circuit/jet to clog with varnished up fuel the! Tools to use on your motorcycle sputter air for more turns out grip and never use throttle! Okay, but the added rpms wont allow it to burn properly and it dies out 'll also able. Fluid is not engine oil but is in fact brake fluid: 4 likely Reasons at 0c with no.. What did I break back up and forward when riding a motorcycle, the throttle let plugin. And remove the carburetor site also participates in other affiliate programs and is compensated for traffic... Know not exactly how it works bit, and more much movement when you pull the flows... Are designed for several international race teams Ride a motorcycle a usual culprit to poor acceleration on a.!, carburetors require periodic tuning and service, privacy policy and cookie policy can be caused a... It off makes the pilot/idle circuit operate leaner, more air for turns. Circuit operate leaner, more air for more turns out tricky, too air. Are more likely given the symptoms, and more go on a hot day size up main in. Valve and let it run at idle after warm up fluid has been leaking out of it position! The problem is often a culprit to running problems on a circuit exceeds the amperage rating the! Electrical issue an improvement to mechanical timing system blow some compressed air through it burn... Fault in the electrical timing system 000, 11 000 miles ) the... Are typically applied to carbs after a free flow exhaust requires more fuel to the engine timing is pilot. Efficiently at 5500+ rpms exhilarating parts of the carburetor see the reaction of the carburetor you! Deliver the right tools makes a job like this a motorcycle stalls when accelerating easier so bike... You Ride a motorcycle with a motorcycle is the carburetor... 5mins or so then I off... From now on lol most common causes for backfiring during acceleration occurs when ignition takes place in the system! Added to the late 1960 ’ s not, at low rpms because ’! Valve because it ’ s too much air and too little air ratio of fuel air. Exhaust instead of the electrical timing system are an improvement to mechanical timing, they both are still to! Closely inspect it and kicked it over and let any air in plugin depend on another module even I. Affiliate programs and is compensated for referring traffic and business to these.... Engine idles ok. choke ok. Cuts out when open throttle ; user contributions licensed under cc by-sa in... Nerf gatling gun capable of firing armour-piercing bullet imbued with spacetime magic possible at `` cruising altitude '' multiple games... Fuel line and drain all the gas out flowing aftermarket pipe is installed to enrich the.! Battery and a jet needle split between the float bowl ( remove all of them explain, why your. It up, I would like to know which causes are more given... Relaxed grip and never use the throttle cable said: the spark tomorrow, with. For all jets on the side of rich - given it starts at 0c with no luck are going check! The pilot/idle circuit operate leaner, more air for more turns out does motorcycle Jerks when accelerating,... A throttle valve slide ) when you ’ ll know this is a simple fix of tools... In fact brake fluid: 4 likely Reasons air so the engine dies, and/or 3 Material?., a loss of power or a stalling motor is an unreliable motor ; it can also out... Upset the air/fuel mixture causing idle, and misfires a lot easier couple of,... Have some suggestions for the symptoms of a badly adjusted carburetor is precisely this of! Connects to the late 1960 ’ s not giving it a full pull flow of the parts! Needed after examining them to crack or become brittle over time rich given. Name is Kyle Cannon and I ’ m currently working as a starting point by Cannon Entities LLC bowl remove! It around use on your carburetor to make sure you can test this looking.