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Trans problem
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Posted by: mcstore

Anyone have any transmission problems when going to a 125cc??

Powroll big bore kit 125cc

26mm carb (CRF150F)

Lighter McVay flywheel

Big Gun exhaust

Blew out 3rd gear and damaged others on first ride... I was on it and getting on it real hard in the parking lot. I am over 220lbs and this thing pulls real hard. After about 20 drag runs and cool downs it locked up.

It now seems to work okay but still seems to shift quickley... I have been thinking the flywheel might be too lite??? Matbe the motor is spinning too fast??? Not sure. We race Glen Helen last weekend and it worked fine all day.