Why does my bike die when I turn the choke off?
However, you start it up on choke and everything is fine until you turn the choke off, and the engine dies. What gives? This is a classic symptom of a partially or fully clogged pilot jet. Fuel goes bad after time, and the first circuit/jet to clog with varnished up fuel is the pilot jet.
What causes a bike to sputter?
There are several reasons why a motorcycle sputters. The most common reasons are carburetor issues such as a vacuum leak, fuel leak, or tuning issues. 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.
Is it bad to run bike with 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.
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.
What happens when you turn off the choke on an engine?
The choke increases the amount of fuel in the mixture, creating a richer mixture. This allows the engine to function at its best until it has warmed up enough to run on its normal operating fuel mixture. At that point the choke is turned off and the engine runs with a leaner fuel/air mixture.
What does it mean when your motorcycle engine is sputtering?
Vacuum leaks can cause several problems with the functionality of a motorcycle, especially sputtering. If there’s a vacuum leak, that means the carburetor isn’t giving the proper amount of air to the air and fuel mixture which will ultimately result in sputtering and poor engine performance.
When do you close the choke on a carb?
carb, the choke will be a simple, old style plate that opens and closes at the inlet of the carb. If you have to close the choke, it’s telling you that you are getting too much air (making it run too lean). When you close the choke on an n.t. carb you are restricting the amount of air that the carb sucks in.
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.
What does it mean when your bike is sputtering?
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.
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.
What happens when you turn the choke on for a carburetor?
When you turn the choke on for a carburetor, it is creating a rich condition. This makes the bike easier to start, by increasing the amount of fuel present in the air/fuel mixture. When an engine is cold, it needs a little richer mixture in order to get up to operating temperature.