need help gearing jackshaft

[crash32]

Hey guys I have a kt100 trying to gear it for quarter mile dirt track dumplin valley if u know track any help would be appreciated

 

[SeayHiPerformance]

I would start around a 7.2 ratio But a lot depends on how much you want to turn your engine.

 

[alvin l nunley]

I would start around a 7.2 ratio But a lot depends on how much you want to turn your engine.

with 209 chain, 7.2 ratio can be reached without a Jack shaft and still have a lot of ground clearance.

From the desk of Al Nunley
Comments compliments criticisms and questions always welcome.
If the data does not support the theory, get a new theory. (Al Nunley)