Athena Top End Race Gasket Kit Yamaha YZ250 / YZ250X 1999-2027

Athena Top End Race Gasket Kit Yamaha YZ250 / YZ250X

When working on a racing engine, adjusting the cylinder height is sometimes necessary to fine-tune the squish clearance, achieve the correct compression in the combustion chamber, or optimize valve timing. To address this, Athena technicians created the Race Gasket Kit, a comprehensive engine gasket solution designed for the most popular Motocross and Enduro applications, covering both 2T and 4T engines. The kit includes a cylinder head gasket and two cylinder base gaskets: one with the same thickness as the OEM part, and another with a reduced thickness of 0.1 mm.

Features:

• Specifically designed for the pro, semi-pro and amateur rider who freshens up their engine prior to a race or during mid-season
• Kit includes a top-of-the line MLSS head gasket and two or more premium-quality base gaskets of different thicknesses to optimize engine compression ratios
• Gives the rider a choice of using standard gas with stock compression or race gas with a higher compression
• Kit does not include valve stem seals, rubber parts, shims or other fiber gaskets