the bike has spark and is getting fuel but won"t fire.I've cleaned the carb,changed air filter,new plug,drained the tank and put fresh fuel in but still no fire.I rode the bike three weeks ago,had to bump start it then,and it ran fine.Any ideas.

 

That's a tuff one to narrow down here... You need three things to run. Spark, fuel, compression... Are you sure you are getting fuel in the chamber. Have you tried to spray starting fluid?? 8 out of 10 times it's a fuel problem.. If you tried starting fluid, just to test the fuel situation, and you have spark, then what's your compression like? If you have all three, it has to run.. theoretically...

 

Thanks for the advice. I tried it but still no fire.While checking spark I had a small pop outside the cylinder.I don't know how to check the coil or cdi.What about timing.

 

Could be timing.. I can't help you much there. I do not know a thing about the klx. I bet if you post this down in the KLX section here, one of those guys can help ya. There's some smart dudes down there!!

 

Thanks again I'll give that a try.

 

Thanks again I'll give that a try.