Cylinder Piston Gasket End Kit for Warrior 350 YFM350X Big Bear 350 2x4 4x4 ATV Parts Kit includes piston, rings, wristpin, circlips, and gasket set as shown.Cast piston features increased silicon content for added strength.Piston skirts are coated with molybdenum and teflon to reduce friction and wear, extending service life.Piston dome is anodized for improved heat resistance.Gaskets are constructed from performance-grade materials for enhanced and sealing.Includes all necessary components for end rebuild: cylinder, standard bore piston, piston ring set, wristpin, circlips, cylinder base gasket, cylinder head gasket, and chain tensioner gasket.Specifications: Condition: Aftermarket Quantity: 1 Set Piston Material: Forged Aluminum Actual Displacement: 348cc Bore Type: Standard Bore Bore Size: 83.00mm Stroke: 64.50mm Piston Diameter: 82.95mm Piston Height: 58.80mm Pin Height: 65mm Pin Diameter: 19mm Replacement parts: Cylinder: 1UY-11310-03, 5YT-11310-00-00, 4WU-11310-00-00 Cylinder Base Gasket: 4KB-11351-00 Cylinder Head Gasket: 1UY-11181-01 Chain Tensioner Gasket: 3GD-12213-00 Piston: 1YW-11631-01-Y0, 1UY-11631-01-Y0, 5UH-11631-00-C0 Wristpin: 55V-11633-00 Piston Ring Set: 4GB-11610-00 Circlips: 93450-19095 Fits: Moto-4 350 (YFM350ER) 1987–1995 Big Bear 350 4x4 (YFM350FW) 1987–1999 Big Bear 350 2x4 (YFM350U) 1996–1999 Bruin 350 4x4 (YFM350FA) 2004–2006 Bruin 350 2x4 (YFM350A) 2004–2006 YFM350G 2x4 2007–2011 YFM350FG 4x4 2007–2014 YFM350FGI 4x4 IRS 2007–2011 Warrior 350 (YFM350X) 1987–2004 YFM350R 2004–2013 Wolverine 350 4x4 (YFM350FX) 1995–2005 Wolverine 350 2x4 (YFM350X) 2006–2009 Ring end gaps are pre-checked before shipment.Verify fitment by comparing with your existing unit and product images.