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2004 kawasaki kx 250 fouling plugs left and right, the mix is 50;1 what do i do.?
- Thread starter Matt S
- Start date
Put in new plugs and get the engine warmed up. Get up to a speed that will have you on the high speed jet for at least a mile or two. then pull in the clutch and immediately hit the kill switch so the engine dies before idling down. That way your plugs will show what the high speed jet is doing. When the engine is cool enough, pull the plug and it should be chocolate brown color, like a Hershey bar. If its dark brown to black you need to jet down as you are getting too much fuel. You can do the same for the idle jet without having to go anywhere. In that case you would want to keep the throttle at idle or very low to avoid any influence from the high speed (or main) jet. Have you considered other possibilities such as a stuck choke, a carb float that is sticking down and letting too much gas through or that with a pipe and jet kit, you may need to go to an intake kit to increase incoming airflow? A word of caution, change jets a little at a time as going to smaller jets or lowering the needle position will make the engine run leaner, and it could burn down. Go a little at a time and keep checking your plug condition.
Put in new plugs and get the engine warmed up. Get up to a speed that will have you on the high speed jet for at least a mile or two. then pull in the clutch and immediately hit the kill switch so the engine dies before idling down. That way your plugs will show what the high speed jet is doing. When the engine is cool enough, pull the plug and it should be chocolate brown color, like a Hershey bar. If its dark brown to black you need to jet down as you are getting too much fuel. You can do the same for the idle jet without having to go anywhere. In that case you would want to keep the throttle at idle or very low to avoid any influence from the high speed (or main) jet. Have you considered other possibilities such as a stuck choke, a carb float that is sticking down and letting too much gas through or that with a pipe and jet kit, you may need to go to an intake kit to increase incoming airflow? A word of caution, change jets a little at a time as going to smaller jets or lowering the needle position will make the engine run leaner, and it could burn down. Go a little at a time and keep checking your plug condition.
Put in new plugs and get the engine warmed up. Get up to a speed that will have you on the high speed jet for at least a mile or two. then pull in the clutch and immediately hit the kill switch so the engine dies before idling down. That way your plugs will show what the high speed jet is doing. When the engine is cool enough, pull the plug and it should be chocolate brown color, like a Hershey bar. If its dark brown to black you need to jet down as you are getting too much fuel. You can do the same for the idle jet without having to go anywhere. In that case you would want to keep the throttle at idle or very low to avoid any influence from the high speed (or main) jet. Have you considered other possibilities such as a stuck choke, a carb float that is sticking down and letting too much gas through or that with a pipe and jet kit, you may need to go to an intake kit to increase incoming airflow? A word of caution, change jets a little at a time as going to smaller jets or lowering the needle position will make the engine run leaner, and it could burn down. Go a little at a time and keep checking your plug condition.