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About Alfordz123

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  1. Alfordz123

    03 CRF450 Valve Shim Help!!!

    I just got a 03 CRF 450 and put new rings timing chain, and intake valves in it. I am having problems with it hot starting... i have shimmed the intake for .006 and the exhaust at .012 and the decompression at .022 From what i know its all stock... it starts super easy when its cold and hard as hell when its hot.. when i roll start it..it immediatly fires.. it is also over heating..or blowing cooling out the overflow..not sure if its a bad cap or something up with timing making it do that.. just put a new head gasket on it.. Anyone have a idea?? even if it makes it harder to cold start...i want it to hot start easeir cause it is wearing me the hell out!! Thanks