Be careful when ordering as many Chinese 125cc engines are not the same. This gasket set is suitable for horizontal engines with a displacement of 123.67 cc. 54x54 cm (so-called "square") for 154FMI engines regardless of the manufacturer. It will NOT fit GY6 engines, 157FMI engines, etc. or other engines with the same displacement. At the same time, this is a quality gasket set at an affordable price. Every serious motorcyclist should have a gasket set. . . just in case.