Wont shift into 4th

Topher9545

Member
May 6, 2015
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I recently rebuilt the lower and top end of my blaster and it's been running and shifting great. Last time I rode it, it was running great and shifted through all gears. Sat for about 3 days and I ride it around and it won't shift into 4th. What gives? Where should I start? Oil is full mobile 10-40 racing for wet clutches. Thanks guys.
 
Could be the shift fingers. they commonly wear out on any atv/bike engine

my friends predator would fall out of 5th because one was wore out. at the end he couldnt make it into 4th either