Welcome to the AENBUSLM storeAll of our products are manufactured in our own factory. The quality of the product is very good.Please buy with confidence. We will arrange delivery on time.Part Number: MPN: 5UH-11631-00-C0, 1YW-11631-01-Y0, 1UY-11631-01-Y0Yamaha Warrior 350 YFM 350 X 1987-2004 piston ring gasket spark plug set Features: The kit includes piston, ring, pin, clip and top gasket kit (you can get exactly what is shown in the picture). The cast pistons have an ultra-high silicone content to provide additional strength. The piston skirt is coated with molybdenum Teflon to minimize strength/wear and extend service life. The piston dome is anodized for excellent heat resistance and longer life. The gaskets use high-performance materials to improve durability and provide greater reliability. Includes all the joints shown in the image to rebuild the top end. The kit is standard Hole size: 83.00 mm. The piston measures 82.95 mm. Standard compression ratio 9.2:1. All components in this kit are ready to be bolted together for a smooth installation. Specification: Condition: Aftermarket 100% new Quantity: 1 set Piston material: Forged aluminum Hole size: Standard 83 mm (82.95 mm actual) Piston height: 51.40 mm Part number: Piston: 5UH-11631-00-C0, 1YW-11631-01-Y0, 1UY-11631-01-Y0 Cylinder base gasket: 4KB-11351-00-00 Cylinder head gasket: 1UY-11181-01-00 Bayonet: For Yamaha Warrior 350 YFM350X 1987-2004 (compatibility matrix for reference only!! (Compare with your faulty unit and the picture we provide to determine if it fits) The package includes: 1 standard size piston, 1 piston ring kit, 1 wrist pin, 2 lock rings, 1 head gasket, 1 cylinder block gasket, 1 spark plug, 1 exhaust gasket.Links and descriptions to (AENBUSLM) may not be sold without permission from (AENBUSLM).Violators will be prosecuted for infringing intellectual property rights.