Depth: 25,5 cm. Quantity: 1 set Piston Material: Forged Aluminum Hole size: STD 83 mm (actual 82,95 mm) Piston height: 51,40 mm PART NUMBER): Piston: 5UH-11631-00-C0, 1YW-11631-01-Y0, 1UY-11631-01-Y0 Cylinder base seal: 4KB-11351-00-00 Cylinder head gasket: 1UY-11181-01-00 INSTALLATION: Fits Yamaha Warrior 350 YFM350X 1987-2004) THE PACKAGE CONTAINS: 1x standard size piston 1x Piston Ring Set 1x wrist 2x safety rings 1x cylinder head gasket; 1x cylinder block gasket; 1x spark plug; 1x exhaust gasket; FUNCTIONS: The cast piston has a very high silicone content for extra strength. Piston skirts are coated with molybdenum Teflon to minimize resistance/wear and ensure a longer lifespan. The piston dome is anodized, which provides excellent heat resistance and a longer lifespan. Gaskets use high-quality materials to increase durability and provide greater reliability. Includes all the seals shown to rebuild the top end. Set for standard hole size - 83,00 mm. The piston is 82,95 mm. 9,2:1 Standard compression ratio. All components in this kit are ready for hassle-free installation.