SCHMITT Racing piston set, suitable for 50cc cylinders with 38mm liner, suitable for various Simson models such as S51, S53, SR50 and Schwalbe KR51/2. The piston has a diameter of 37.97mm and is provided with a molybdenum coating, which offers optimum sliding properties during the running-in phase. The piston rings are made of spring-hard steel, coated with chrome, thinner and specially hardened to significantly reduce friction. The scope of delivery includes the piston, the piston pin, two piston clips and two piston rings.