Is the choke on a dirt bike up or down?
If you have the NT carburetor the choke is on (closed) when the lever is up. If the engine isn’t running it doesn’t make any difference where it is. The choke should be off (open or down) when you’re riding. Just remember to shut off the fuel petcock when the bike is parked.
Why is the choke on my 2 stroke engine stuck?
If it runs the same in both positions, then the choke is either stuck on or off. An engine that isn’t up to full operating temperature (180 degrees or higher) can’t ignite and burn the air/fuel mixture as efficiently.
Why does my dirt bike only run on choke?
You won’t see one of these on a dirt bike because the choke circuit actually just adds more fuel to the mixture with the same amount of airflow. So, a far too lean air/fuel mixture is why your bike only runs with the choke on.
Why is my 2 stroke dirt bike hard to start?
Hard starting when hot or cold, poor response when opening the throttle, reluctance to idle, all of these are symptoms of an improperly sized pilot jet or incorrectly adjusted air screw.
Why is my 2 stroke engine bogging so much?
We already discussed why rich jetting causes bogging. If you don’t fix that problem, it will eventually cause the spark plug to foul and make it run even worse. Worn or scored piston and rings can also cause a plug to foul easily. A worn top-end has less compression and can’t fully burn the air/fuel mixture.
When to turn off choke on 2 stroke engine?
There is a simple solution for this one, but it’s an easy one to forget. Turning the choke on is important for starting a cold engine, but it should be turned off once the engine is warm enough to stay running. The choke creates a richer air/fuel mixture to be able to idle on first start up.
How does a 2 stroke dirt bike work?
If you set the idle when the engine is cold, the idle will decrease as the engine warms up. The pilot jet meters (controls) the amount of fuel that mixes with the air when the throttle is 0-¼ turn open. The pilot jet is the smaller jet circuit and is one of the most important factors to making your 2 stroke run well.
You won’t see one of these on a dirt bike because the choke circuit actually just adds more fuel to the mixture with the same amount of airflow. So, a far too lean air/fuel mixture is why your bike only runs with the choke on.
Where are the mixture screws on a 2 stroke engine?
Mixture Screws The first thing to check before anything else is the mixture screws. The fuel air mixture screws on the side of the carburettor are marked H for High for the engines high speed adjustments and the L means Low for the engines low speed adjustments.