Hi,
Whilst your engine number suggests a 596cc shortstroke Flying Squirrel, over the years it could have been converted to a 498cc by swapping cylinder barrels, and it could even have been converted to longstroke, or a hybrid mix of the two. You therefore need to measure the bore size very carefully. I should be able to supply rings to suit your engine. Whereabouts are you? If anywhere nearish to me you could bring your engine over to make sure that I’ve got the right parts. I also have all gaskets and lots of engine , clutch, and gearbox parts for vintage three-speed Scotts.
Brian
