I have an 04 250R and I rejetted it to Pro-Circuits jet specs, it has an FMF slip on and I just installed the AP Mod. The bike refuses to cold start, I have to bump it to start it. The valve clearences are with in spec, one is really tight and can"t be shimmed up any more. This just started before my last ride after the AP Mod. What is the problem please help I want to ride!!!!