Originally Posted by
look no hands
Tony correct me if I'm wrong but I'm sure the 28mm cylinder size of the Challenger is the same as the Supersport (Merc, Superstar and Airsporter as well), are you getting confused with Project 'Cock which is 25mm?
Totally agree with you about the Challenger being more graceful, sorry mate but I'm not quite sure about piston removal as I've never done it on a Supersport, I've only ever owned a couple of Lightnings and I never opened them up, I've opened a Superstar up (same procedure as a Supersport) but never took the piston out because of the Maxigrip, if you need opening up advice I can help with that.
Pete