Why does my bike only run with the choke on?

Why does my bike only run with the choke on?

If a motorcycle or ATV only runs with the choke on, it’s because the richer “choke on” mixture is actually closer to the engine’s normal operating fuel mixture than the leaner “choke off” mixture. So when the choke is turned off, the engine gets too little fuel and too much air for it to run and it stalls.

Is it bad to run a motorcycle with the choke on?

The main reason that we advise not riding with the choke on is that it can be harmful to your motorcycle. Overfuelling can cause a variety of problems for your bike, from it running hotter than usual to the pistons being damaged by excessive heat through misfires.

How does a dirt bike choke work?

How does the choke work? When you close the “choke” you reduce the volume of combustion air entering the cylinder, this changes the air/fuel ratio to a very rich mixture. More fuel in the air fuel mixture than normal helps the bike to achieve ignition of the air fuel mixture and start.

Should Choke be open or closed when starting?

When doing a cold start, the choke should be closed to limit the amount of air going in. Once the car has warmed up, if the choke does not open fully, the restriction in air may result in reduced power.

How long should you leave the choke on?

The choke usually “chokes” the air supply into the engine so it gets more petrol than usual. Hence it’s name. You should start the bike from cold with half or full choke depending on how cold it is. After 30 seconds is usually enough for most bikes.

Is it bad to leave choke on?

Leaving the choke on for too long will cause unnecessary engine wear and waste fuel. This is also bad for the environment. One a cold day, the engine can need more fuel than usual to get running – this makes the mixture ‘rich’, and this is what the choke does.

When should I use the choke?

When Should the Choke Be Used? The choke should only be used when starting and warming up your motorcycle. You can leave the choke engaged while the engine warms up to operating temperature. It may be necessary to leave the choke on while you ride for the first mile or so to warm the bike up.

How do you activate an automatic choke?

How to Set the Automatic Choke

  1. Park the vehicle and shut off the engine.
  2. Raise the hood and lock it in place.
  3. Locate the throttle lever on the left side of the carburetor.
  4. Release the stopping arm and the throttle lever so that they both snap back into place.

How do I know if my automatic choke is working?

You’ll notice that the automatic choke has a needle on the end of the plunger whereas the manual one doesn’t. The needle allows the automatic choke to gradually allow less and less fuel to flow through the choke circuit until it finally closes it fully after the engine has been running for a few minutes.

What would be the effects of a sticking automatic choke?

A sticking choke, automatic or otherwise will result in excessive fuel use, engine racing, driving like a pig. Do yourself a favour and put a manual conversion on it! If its stuck open the car will run rich once warm, throttle response will be poor & it will probably stall eventually at idle.

How do I know if my electric choke is bad?

If it pulls the blade completely of in 5 minutes, then it’s working. If it doesn’t get the blade vertical and hold it there in 5 minutes, then the choke needs adjustment or it’s not working properly…

How do you test an electric choke coil?

Check from red plug to ground to be sure you have power first. Your photo shows the choke in it’s cold or closed position. When you work the throttle the fast idle cam (other side of the carb) should rotate into the fast idle position. Turn the ignition on and wait a minute…..now work the throttle again.

How does Weber electric choke work?

A carburetor choke works to adjust the amount of air that can flow into the carburetor. The less air, the more fuel will be delivered. Weber carburetors are easy to adjust as the choke is controlled by a choke ring on top, there is no need to remove the cover to access the actual choke butterfly.

Will an electric choke work without a battery?

Yes the choke still operates with a low or dead battery. As bluefront said after the bike is shut off the choke starts to return to the default position as it cools off. The stator applies voltage to the choke only when the machine is running. Has nothing to do with the battery.

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