300ex gearing

[cbrooks118]

What is the ideal gearing on a 300ex with 20x11x9's razrs, bored over .010 and a high comp wiseco 11:1? Right now i think the sprockets are stock and i am geared way to low. tops out at about 45mph maybe..... is down on the front sprocket for more top end? and down in the back? Thanks for helping an amatuer

[300exOH]

Larger front sprocket =higher top speed
smaller rear sprocket =higher top speed

A 14T front sprocket will get it back to stock top speed but you will have to trim the case saver or remove it. Or you can go down to a 36T rear.
Stock is 13T front/38T rear.

[Trevor]

I run 13/36 with a stock motor with just bolt on's and I top out at 95 kph on a slight up hill