after tearing apart the top end of the motor i've found out that the lock nut for adjusting valve clearance fell off and stopped the cam from spinning, which in turn sheared the sprocket off the cam shaft...
so...now im on the hunt for a new cam shaft for a reasonable price.
so i've been working away at a "quick" little sr250 tracker project over the last few weeks, got the bike for free and just wanted to change it up a bit.
it started when i got it but had a tick in the motor around the cam chain.. sat around for a bit while i cleaned out the carbs, did a new...
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