The bike also needs a gearing change for street riding. It came with 15/48 gearing with a 420 chain, and it tops out at about 35 ~ 40 mph in 5th. I've got a 16-tooth front sprocket on the way. I bought one for a Honda SL125, since they're interchangeable.
The rear sprocket, though, is a mystery. I've read other threads that talk about measuring the center hole diameter and the bolt circle dimensions and ordering based on that. I did an on-the-bike measurement and got about 2-1/16" for the center hole. Bolts are 2" apart and about 2-7/8" apart on the diagonal.
Anybody have any details or interchangeability hints?
I'll make a decision on number of teeth based upon how it drives with the 16-tooth up front. I'm thinking 45 or even 42 or so.
And that's about all for now. More updates to come when parts start arriving. Woo Hoo!
Kirk