Cylinder Kit 63Cc Nk101.65Cylinder Kit 63cc 42mm for SYM 50cc 4 stroke, Peugeot 50cc 4 strokeFor those who do not want to go radical with performance tuning such as 47mm or 51mm, but fancy a little more grunt, there is a 63cc cylinder kit with noticeably better drive than the 50cc original This cylinder kit will iron out holes in the drive as well as on inclines. Kit includes cylinder, piston, piston ring set, oil scraper rings, gudgeon pin, gaskets and circlips The piston has