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Won't idle or run high RPM

Posted: Tue Mar 27, 2018 5:54 pm
by Barthalomew
Hello! i have a 2008 CRF 100F and the bike would not run unless at half choke. So i figured the engine was not getting enough gas and so i loosend the intake valve and checked the exhaust valve. I have already cleaned the carb jets and the carb and its self. It will run when i give it throttle but very rough and will not idle. It runs up to a certain RPM the it seems to choke out. i was trying to check the ignition coil but i do not know resitance it should be, does anyone know? i cannot find it online...
-thanks

Re: Won't idle or run high RPM

Posted: Wed Mar 28, 2018 11:43 am
by Back2-2
Your description really sounds like you have a clogged pilot jet. I know you say you cleaned the carb & jets but that sure sounds of clogged pilot symptoms. The pilot has very small orifice and diffusion ports. If I recall the main orifice is .015. That requires a very fine jet cleaning tool to get crap out that has hardened.

Just my 2 cents before you go spending bucks on electrical parts is to re-investigate the carb.