MikeXS clearly states that his 5th gear overdrive "XS650's 1978 - 1984 Only! Note: Yamaha changed the shape of transmission gear teeth from 78 on and this is indicated by lines cut into the crest of each
tooth."
My question is: can I swap out the transmission from a later model and get the OD 5th in my '75?
tooth."
My question is: can I swap out the transmission from a later model and get the OD 5th in my '75?