View Single Post
Old 09-14-2009, 10:13 PM   #1
kevingraehl
Not Yet Wild
 
Join Date: Sep 2009
Posts: 3
Default 1978 Harley Motor swap to a CRF 450cc motor. pics inside.. gearing help???/

















I forgot how small the tires were.. i calculated ... well lets just say with the motor at the rev limiter my top speed is 12 mph..in 5th gear..

Who has taken the rear end out on one of these? what gear ratio is it.. Can i get a 6-1 Hi speed rear end kit-- i only see them listed from 1988 and up.



the front sproket on the motor is a 13 tooth.. the rear welded on sprocket is also a 13 tooth.. The rear end seems like a 13:1 reduction drive-- coupled with small tires makes me not move and not happy:)

I ordered up a 28 tooth front sproket ( from the rear end of a yamaha kids quad-- 520 chain size ) and a 12 tooth Rear sproket..

I will have to weld a spacer / adapter so the 28 engine sprocket clears the ignition case on the dirtbike motor..

so here is my question.. Should i just turn the motor 90 degrees to the right and put a go cart axle on it? ifso anybody got one cheap?
kevingraehl is offline   Reply With Quote