What causes a motorcycle to stall at idle?

Extremely lean motors can also stall out completely when given some light throttle. Another sign of lean running is the “hunting idle” where the motorcycle revs up randomly, changes RPMs, or takes forever to come down to idle.

Which is worse rough idle or perfect idle?

Very rough idle with a repetitive cycle that is smooth for a couple of seconds then misses badly, occasionally stalling. Worse problem is bad hesitation when accelerating after throttle at idle position, sometimes stalling. Worst after stationary idle, but also after moving at low to medium speed with closed throttle and then accelerating.

Which is the worst idle after a cold start?

Worst after stationary idle, but also after moving at low to medium speed with closed throttle and then accelerating. Also very hard to start because of periodic ‘backfire’ while cranking that brings engine to standstill. Idle is perfectly smooth for first 1 – 2 minutes after overnight cold start, before missing at idle starts.

What are the symptoms of a bad idle air control valve?

Below are the top 5 symptoms of a bad idle air control valve which you will easily notice. Since the idle air control valve is supposed to manage the idle speed of the engine, a bad valve will certainly throw that out of whack. It will cause the idle speed to randomly fluctuate to different speeds rather than stay at one constant speed.

Why does my Mercedes C220 have a rough idle?

While there are a variety of reasons your Mercedes-Benz C220 has a rough idle, the most common 3 are a vacuum leak, an issue with the spark plugs, or a problem with the ignition coil.

Is it normal to have a rough idle?

This is definitely not a normal situation. If you are experiencing a rough idle or your RPM is running high, then there are a variety of reasons for why this could be happening. It is not always easy to diagnose the cause because there are so many factors involved here. Below are the top 5 causes that a mechanic would look for.

Why does my car idle at 700 rpm?

There is an air filter which prevents debris from the air from getting into the chamber. But if this air filter is dirty or clogged, then there will be less clean air passing through it. This will cause the engine to idle rough. Your engine should normally get to around 700 RPM after you start the vehicle.

When does the idle air control valve change?

When the engine is running but the vehicle is not moving, this means the engine is idling. During this time, the number of revolutions per minute (RPM) inside the engine will change. The idle air control valve is responsible for managing the engine idle speed.

Or, you could have air leaking around the throttle, just enough to lean it out at idle; the mounting boots could be the leak, or diaphragms in the carbs, that kind of thing. Wow, thanks both of you! I will try these things when my mechanic manual comes for this bike, the owners manual is like “here is the start button, a durr.”

Can a bike run and idle at the same time?

It runs perfectly and idles with choke off within seconds….A thermal sensor shows that both plugs, and cylinder heads are functioning at the same temp. The engine will run and idle on only 1 cylinder at a time if I want.

What causes the choke out on a motorcycle?

If you are riding with the choke out (more fuel going in), and it is still dying, one of your carbs/injectors is not getting enough fuel. You could be getting back pressure (?) from a plugged pcv (positive crankcase ventilation) valve. Or the fuel may not be getting to/thru the injectors/jets.

Are there any problems with my bike sliders?

The slides work perfectly and both go up and down completely. The carbs and manifolds are 38mm from a 1976 so I don’t have vacuum hoses of any sort. The sliders take 20+ seconds to completely close if I block the air passage which would indicate good diaphragms. The intake manifolds do not leak.

What kind of bike starts but does not Rev?

Check it out! Enjoy XS650.com? Consider making a donation to help support the site. my bike starts,runs,idles perfectly but will not rev! Discussion in ‘ The Garage ‘ started by mouser, Aug 17, 2011 . I have an ’80 with 38mm carbs from a ’76. I have owned an XS since 1977. I have never had anything like this happen.

What should the idle speed be on a motorcycle?

And you will usually not be able to adjust the idle level in any way. Usually we see the idle speed being between 1000 and 1300 RPM (engine revolutions per minute) when the engine is at operating temperature, and often as bit higher during warm up.

Can a bad throttle position sensor cause idle surging?

Idle surging can be caused due to other issues in the car, but if it happens in conjunction with other throttle position sensor symptoms, the culprit is often the TPS. At idle, the ECM will not get the correct information and the throttle will variate randomly causing idle surges. 3) Check Engine Light

What causes idle surges on a car ECM?

Why does my Suzuki df90a have a rough idle?

I have two 2010 DF90As and earlier in the fall the stbd motor started to develop a low, rough sounding idle, but the tach would still read the normal 500-600RPMs. Over the course of a few trips I would get bubbling from the thru-prop exhaust and small oily bubbles coming thru as well.

What causes a carburetor on a motorcycle to sputter?

Vacuum port plugs are cheap and are easy to install. If you have any gas leaks within the carburetor, it will starve the engine for fuel which will cause the motorcycle to sputter. 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.

What should I do if my motorcycle is sputtering?

Start by checking the easiest spot first which would be the spark plugs. Take out your spark plugs and make sure there is no nasty build up on them or any type of corrosion. Also make sure the point isn’t worn down and that the gap between the center and the ground electrode is the appropriate distance.

How do you change throttle settings on a motorcycle?

In doing two stroke tuning we would change settings, start the bike and run it at a particular throttle position as long as we could safely ride it that way then abruptly cut the ignition and hope we could coast back to where the tools were. Doing this allowed us to look at the plug at a particular throttle position and adjust accordingly.

Why does my bike stop after 20 minutes?

My bike will run for about 20 minutes or so, then start losing power and missing and sputtering. Then it stops. I wait 2 minutes, and it runs again for another 20 or so minutes. It’s not the fuel valve (tried normal and Reserve), and it’s not the plugs or wires (runs fine when running).

What to do when your car sputters and stops?

When the power loss/sputtering kicks in open the fuel cap while still riding and if it recovers (by relieving the vacuum in the tank) then I would check the venting of the tank. If it doesn’t work at least you have eliminated one possibility.

What does suicide throttle mean on a bike?

Never ride such a bike – they call that a “suicide throttle” for a reason. It’s also a wise idea to get in the habit of checking now and again to see that your throttle isn’t affected when you turn the handlebars completely from side to side. The clutch cable is far sneakier and creeps into your perception as perceived clutch slippage.

How can you tell if your bike throttle cable is going bad?

The throttle cable normally lets you know it’s going bad by refusing to snap back the throttle grip when it is turned and released. Never ride such a bike – they call that a “suicide throttle” for a reason.

Why is my neutral light not working on my bike?

Clutch switches, kickstand switches and the neutral light can all break to cause this type of problem. Try starting with the kickstand up, clutch in, and bike in neutral to see if the motor spins. If not, these switches can normally be bypassed with a paperclip pressed into both ends of the connector one at a time, MacGyver-style.

What do the numbers mean on a Honda motorcycle?

This letter or digit represents the vehicle type. Most Honda motorcycles use a “2,” which refers to a motorcycle, although “A” or “1” may also be used. Locate the fourth through the eighth characters. These letters and digits are used by each individual manufacturer to identify the model or engine type of the motorcycle.

What to do when your motorcycle starts stalling?

Now option b) give it more choke, it goes back up to 1,500 rpm which is great and then 10 seconds later it starts sounding like its going to take off (4k rpm atleast) sometimes you can get it to idle at 1.5k for a minute or two, but then it will either start to die, or it will start revving too high.

How to decode the VIN number on a Honda motorcycle?

How to decode the VIN Number on a Honda Motorcycle. Have you ever noticed the string of numbers and letters printed on the side of your Honda CBR, Valkyrie, or Shadow and wondered what they meant? Likened to the DNA of the motorcycle, these Vehicle Identification Numbers (or VIN) have appeared on every vehicle manufactured since 1981.

Is the warrior Idles fine when trying to accelerate?

The warrior idles fine. I’ve adjusted to air mix screw back and forth. It changes the idol but doesn’t seem to improve things when I try to rev it up. 2.25 turns seems to be the sweet spot, as far as idol. The needle is where zoom put it.

What to do when your bike Idles but dies?

Either way the solution is the same. Pull the carb bowls off. Pull the jets and clean them til you can see perfectly through them. Use carb cleaner, and compressed air or my favorite a few strands of stripped electrical wire to push all the gunk out of em. TPS sees fuel going in and compensates, but compensates for nothing. I had the same happen.

What to do if your bike Idles but bogs with throttle?

I will look during tomorrow times. If it idles fine but it bogs down with throttle, your high speed gas jet is probably clogged. Clean your carb and spray carb cleaner in all small passages, make sure air can flow through all ports no matter how small. Put it back together and it should run great.

What to do if your bike dies when you give it throttle?

Bike dies when you give it throttle – Tech Help/Race Shop – Motocross Forums / Message Boards – Vital MX I have a 2006 yz250f that has sat since 2009. Recently, I cleaned it up and drained the old gas out of it. I put fresh gas in it and kicked it over and let it run at idle for about 10 minutes.

Why is my throttle cable going bad on my bike?

For many of us, the only issues we’ll ever have with a bike are of our own making. Up until very recently, most bikes have had at least two cables that can go bad and cause headaches: the throttle, and clutch cables. The throttle cable normally lets you know it’s going bad by refusing to snap back the throttle grip when it is turned and released.

When did my bike die at a red light?

Now today (Friday), start it up about 2-3 miles into my 10 mile trip to work, I’m in bumper to bumper traffic, in neutral at a red light just waiting and the bike completely dies similar to what happened Wednesday just this time I wasn’t even touching anything or even in motion.

Can a stator be replaced on a twin cam Harley Davidson?

In this video, Mike walks us through the process of a full charging system test, along with the removal of a complete charging system on a Twin Cam touring model. He demonstrates the stator replacement with a 50 amp upgrade. This upgrade will keep your battery up to snuff as the demands on the battery and charging system keep growing.

How can you tell if a motorcycle engine is running lean?

The engine isn’t receiving enough fuel to make the motorcycle run efficiently. You’ll also notice that if an engine is running lean, the engine and exhaust pipes will become very hot, even hotter than normal.

Can a car run on one cylinder at a time?

The engine starts first kick..on choke when cold. It runs perfectly and idles with choke off within seconds….A thermal sensor shows that both plugs, and cylinder heads are functioning at the same temp. The engine will run and idle on only 1 cylinder at a time if I want.

Should you start or idle a motorcycle during cold winter?

Podcast-In this episode we break down the old myth that you should go out during the winter every so often to start your motorcycle and let it idle for a bit to warm it up. Many think this will keep things lubricated and that it is good for the motor to do this. Heck, I used to do it because that’s what my father always did with sitting cars.

What happens if the idle level is too low?

Idle level too low. If the idle level on your (warmed up) engine is lower than the level decided by the manufactorer, you will usually have two problems: – The oil pressure inside the engine will be very low, and you may see the oil pressure lamp flicker. – Charcoal cannister in the tank ventilation line clogged by fuel or dirt.

What happens when you hit start on a bike?

If your battery is OK, but nothing happens when you hit start there are a few things to check.

How to solve Honda idle issues, rough idle?

When watching the Honda idle video please remember that adjusting the FITV is the LAST step in the process and you need to back it off at least 1/2 turn after it bottoms out or it will not start properly when cold. I have many of you come to me and say that you’ve adjusted the FITV and you still have an issue.

Can a FITV cause a Honda to idle?

The FITV is not the only thing that can cause an idle issue with your Honda so be sure to follow ALL the steps first before making that adjustment. If playback doesn’t begin shortly, try restarting your device.

Can a aftermarket PCV valve cause idle problems?

If you see an aftermarket PCV valve, exchange it for an OE valve. Believe it or not, I’ve seen idle issues caused by aftermarket PCV valves on Honda’s. The OE PCV valves last just about forever so you can easily justify the expense. I will admit however that the OE valves sometimes come apart internally and cause idle problems.

What should I do if my bike is stalling?

What you might be doing with the choke is trying to keep the bike running,and that is a job better done with the idle stop screw. Try to increase the idle with this screw, and hopefully the bike will at least run without using the choke.

What’s the idle speed on a Yamaha bike?

The bike hasn’t been running to my knowledge for 4-5 months. Prior to my purchase the previous owner, a friend, said he cleaned the carbs. Basically, she’ll 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.

Why does my bike stall when I switch gears?

When the bike is actually rolling there doesn’t seem to be too much of a problem, except that it stalls when you switch gears unless you have the choke in a bit (this bike, you can never turn off the choke or it stalls immediately) otherwise the bike stalls even if you are giving it gas.

What to do when your dirt bike won’t idle?

Whether you have a 2 stroke or a 4 stroke, if the idle adjustment is set too low, the engine won’t stay running. Turn the idle screw in and see if your dirt bike stays running. You may have to turn the idle down slightly as the engine temperature warms up. Did You Warm The Engine Up?

Why does my car stall after a long ride?

After riding a while and it is hot it will stall at idle but starts back up with no problem. It just will not idle. It will also return to normal and idle fine after stopping for lunch. It sometimes is fine for the rest of the ride. Any Ideas? Check for trouble codes. A failing sensor will often “act up” when warm/hot.

Why does my Harley Davidson stall at a stop sign?

After I’ve been riding for awhile and the engine warms up it will idle stronger and is usually fine, but once in awhile when I start from a stop sign or light it will stall and I’ll have to give it some throttle to start and idle up. Of course it never does it when the dealer has it.

What are the symptoms of lean idle on a motorcycle?

Spark plugs are clean – No residue. Insulator may be white. Runs better at higher altitudes – AFR becomes normalized due to reduced atmospheric pressure allowing fuel into the venturi easier. Backfires – Popping on deceleration for a lean idle circuit or backfires in general.

What causes engine to run hot on lean idle circuit?

Backfires – Popping on deceleration for a lean idle circuit or backfires in general. Runs on choke – The vehicle may run on choke when it’s warm but stalls if the choke is turned off. Engine runs hot – Due to more oxygen than fuel combustion temperatures are hotter reflecting on a temp gauge.

What causes your motorcycle to bog down when you run out of fuel?

Lean Bog – This is caused when there’s too much air and not enough fuel in the engine. You’ve probably experienced this bike acceleration problem when you run out of fuel on your motorcycle or if you’ve opened your airboxes. This feels like hitting the kill button on the engine for a second.

What are the most common problems on a Harley Davidson?

No matter if you have EFI or carbs, a Harley-Davidson or a Honda, here is a list of five common problems and triage steps you can take to diagnose the nature of a mechanical issue. Even if you can’t fix it, you don’t have to blindly trust your hard-earned cash to the honesty of the nearest “reputable” mechanic.

What did I do to make my Honda 97 start?

Boiled the carb in lemon juice yesterday which worked as advertised. Really amazing. After that and a spray down with carb cleaner and compressed air, new carb kit and an inline fuel filter installed, my 97 started like a champ.

What kind of fuel does a Honda Shadow use?

A lot of the sport bikes and air-cooled bikes require higher octane fuel because of the higher combustion chamber temperature, higher compression, and advanced ignition timing. Your Shadow’s engine is a liquid-cooled, low-revving, low compression engine.

Why does my Honda Shadow hesitate during acceleration?

Only happens during acceleration. When I open up the throttle it hesitates then all of the sudden the engine responds. It seems to be worse in the lower gears (1 & 2) and lessens in the higher gears. The warmer the bike, the less issue, but even when warm and run a while it still exhibits this problem.

What to do when your Honda Shadow loses power?

You can put a piuece of hose on that nipple and turn the screw out about 3 turns. That’s the drain. Use the hose to direct the draining fuel into a suitable container and then re-tighten (gently until it seats) the drain screw. That ought to do it!

How do you drain fuel from Honda Shadow?

At the bottom of the carb (each one) you’ll find a small nipple that sticks out, and above that is a screw. You can put a piuece of hose on that nipple and turn the screw out about 3 turns. That’s the drain. Use the hose to direct the draining fuel into a suitable container and then re-tighten (gently until it seats) the drain screw.

How can I tell if my motorcycle is lean?

Why does my car feel like it is going to stall?

When you accelerate, the engine RPM increases, and as you let off the gas, the RPM slowly returns to the normal idling speed. However, when the engine RPM drops below the normal range of 800 RPM (for most cars), it is more than likely that you are dealing with an IAC valve problem.

What causes the Check Engine light to turn off at idle?

At idle, the ECM will not get the correct information and the throttle will variate randomly causing idle surges. The check engine light will randomly turn on and off even if the car is running smoothly without any jerks and stalling.

Why does my electric bike keep cutting out?

Electric bikes can be quite finicky, especially if you’re a beginner. An electric bike only works if all the components are functioning correctly, which means there is no easy and quick way to troubleshoot major problems. One of the most common e-bike problems is the power cutting out.

What causes arcing in electrical wire on motorcycle?

A breakdown in the insulation can cause arcing in the plug wire. You will be able to see the wire spark in low light conditions. Plug caps may be cracked, which can cause corrosion or an open circuit. To test the cap, you will need to remove it. Use your multimeter to check for resistance. It should read in the thousands for Ohms.

How does the controller work on an e bike?

An e-bike controller takes input signals from the controls and sensors, this signal is analyzed and then the controller decides how to best transfer the energy coming from your battery to the motor.

How can I tell if my motorcycle is having electrical problems?

Connect your multimeter leads to the connector and check for resistance by setting your meter to Ohms. Compare your readings with your shop manual’s specifications to see if they are within range. You can also check the gap between the coil and the magnet. Make sure that it is gapped to the manual’s specs.

What causes a car to stall during a turn?

Car Stalls During Turn; Bad Fuel Pre-Pump Likely Cause Poor Performance; Rich Mixture Smell: Diagnostics; Faulty FPR Poor Perfomance, Bad Acceleration: Faulty FPR Engine Hesitation: Bad FPR Fuel in Oil: Faulty FPR or Injector Other Running Problems: Car Stalls Repeatedly on Startup: Fuel Pump Check Valve

Why does my truck idle when its cold?

When youre truck is just warming up, its still cold the efi is dumping fuel because its in like “Choke” mode. As it warms up, it leans the fuel air mix out to acomodate warm engine condition driving. So, when its idleing cold its got the fuel to compensate for the extra air leaking in.

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