Unfortunately it’s more in depth than that. Having machined a set of piston rings from scratch for a 70cc 2 stroke there are a number of clearances to consider. If anyone of them are wrong you’ll cause damage.I'm thinking I can take a little off of the ring gap and get them to fit (52mm = 2.047"). Would this be likely t work? Seems like there are plenty of 52mm chainsaw rings available in the correct width.