Top-end piston set including needle roller bearings, top end gasket set, suitable for KTM / GasGas / Husky TPI 300 2018-on. Measuring the bore is the best way to choose, but typically if piston is changed around 80hrs and the bikes hasn’t seen lots of dusty conditions it will be as follows 80hrs A size 160hrs B size 240hrs B size and so on, as the side of the bore sees very little wear we dont usually reconmend going over a B size, unless the Bore is taken out to the next 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 aluminum 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
