speedo drive
on our bike its on the front wheel yes
on the honda cbr 400 rr tri arm its on the little sprocket cover witch
fits OURS .
theirfor we should have more front wheel choises
i hope this helps

 

meh. the limiting factor in the front wheel is the triple tree and fork width. I tried an F2 front and it will not fit until you put different triple trees and forks in. so the speedo drive is really irrelevant, although thats cool to know.