Without actually riding the bike and giving it a good dose of ‘lookin’ at’, it is impossible to be too specific, but on the 22T final drive sprocket there is no way it could be over-revving at 60mph unless the clutch was slipping, and a 21T is correct for a solo post-war Flyer. I have a suspicion that you are not used to two-stroke twins ? In which case you think it is over-revving when in fact it is not !
Brian
