Top-end piston set including needle roller bearings and top end gasket set, suitable for KTM / GasGas / Husky TPI 250 2017-on. A size is recommended for new cylinders B size is recommended for first and subsequent piston changes. (See handbook tolerances for when to use C size) Oem supplier vertex piston. All pistons are heat treated with a T-5 hardening and tempering cycle All piston heads are provided with a high-tech molybdenum disulfite coating in order to shorten the running-in period and extend the life of the pistons. Cast piston sets are Cast aluminium alloys (not forged) with 18% silicone, which result in an extremely light but very strong piston. Replica pistons and all rings are original spare parts
