I had Superhooper's TS1 in the workshop last night. Nothing serious, but the piston is going to be replaced.
Hooper asked if the scooter could be stroked up from the 58/107 crank that is currently in there, which got me thinking about how people had done this in the past, knowing that the distance from the bottom of the transfer ports to the top of the barrel must be around 58mm.
Roy suggested a 62mm crank. Would anyone like to comment on how they achieved such a conversion?