This is actually my buddy's bike, and he is ready to push it off a cliff. Once it is started & runs for awhile.. no problem. It starts fine & runs great. But, if you let the bike sit for a few days, it simply don't want to start. You can kick it for 30min or even push it off & it wont' start. It might hit just a little when you push it off, but that's it. Valves were just done (kibblewhite intakes) & no issues with the bike after it is warm, or even if you ride it daily. Let it sit cold for a few days &... forget it. Any ideas ?