The piston has already been broken in. but the power valve hasnt. does that mean that i have to rebreak it in?
My manual says 32-1 so i aint messin with it, and so does jm racing. But it varies alot from bike to bike. Jm racing tells 85 owners that just got a rebuild, that they need to run 40-1 on break in then go back to 32-1 after a certain number of hours.