I want to locate a set of 64mm pistons and rings set. I installed a yoshimura 810-812 kit back in the 70's as well all did. I recently had an incident with number 4 piston. I have had the barrels rehoned and now rebuilding the engine. I want to replace the old set of pistons/rings as they have plenty of miles thru them. The other 3 pistons are ok but a new set will be better
thanks alex