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Anybody worked on a CRF250R before?

Nordie

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My buddy's bike has not been running right at all, he told me it has sat for 6 months. I tell him bring it over lets clean the carb and do a rebuild. So I do this and he says it was doing the same thing before hand. The way it was running yesterday, well not wanting to run at all. So after some research it seems like this is a timing issue. So I start pulling inspection plugs, finding TDC, and all the marks line up except the flywheel one, the flywheel cover has a notch in the threads, the flywheel has 2 notches on it, the notch on the cover is supposed to fall somewhere in between the 2 marks on the flywheel. Anybody dealt with this before, my guestimation thus is why the bike is not running correctly.
 
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