Bore is about 54mm stroke is about 55mm all looks good and I not worry about ring gap as the rings looked good and I've had it running and it's very strong feels like twice the power of a Victa 125, but I put that down to no governor / massive crank weights and the blade disc is so heavy easy 2x the weight of an old Victa,once wound up sure would take some slowing down! lol.. It's up to the operator how many revs they feel it needs...Myself I was not game to hold it at full throttle for too long feels like an old Suzuki Pe175 engine bolted to a mower
..oh yeah going with chev orange its very close....
