Feature: 1. Replace Part Number: UY‑11310‑03‑00, 5YT‑11310‑00‑00, 4WU‑11310‑00‑00, 1YW‑11631‑01‑Y0, 55V‑11633‑00‑00, 4GB‑11610‑00‑00, 1UY‑11181‑01‑00, 4KB‑11351‑00‑00, 93450‑19095‑00. 2. Wide Application: Replacement for Big Bear 350 4x4 YFM350FW 1987‑1999, replacement for Big Bear 350 2x4 YFM350U 1996‑1999, replacement for Bruin 350 4x4 YFM350FA 2004‑2006, etc. 3. Complete Kit: The cylinder piston top end kit has 12 pieces accessory in total, including piston, rings, pin, clips and top end gasket, with excellent sealing performance and leakage prevention. 4. Powerful Function: The ATV cylinder kit can accelerate combustion and provide enough horsepower, bring you better driving experience with higher working efficiency. 5. Excellent Performance: The ATV cylinder piston gasket kit is made of selected metal, with great heat dissipation and wear resistance for maximum durability, perfectly fit in and directly replace. Specification: Item Type: ATV Cylinder Kit Material: Metal Bore Size: Approx. STD 83mm/3.3in Piston Diameter: Approx. 82.95mm/3.3inPiston Height: Approx. 58.8mm/2.3in Piston Pin Diameter: Approx. 19mm/0.7in Piston Pin Height: Approx. 65mm/2.6in Stroke: Approx. 64.50mm/2.5in Replace Part Number: UY-11310-03-00, 5YT-11310-00-00, 4WU-11310-00-00, 1YW-11631-01-Y0, 55V-11633-00-00, 4GB-11610-00-00, 1UY-11181-01-00, 4KB-11351-00-00, 93450-19095-00. Fitment: Replacement for Big Bear 350 4x4 (YFM350FW) 1987 - 1999 Replacement for Big Bear 350 2x4 (YFM350U) 1996 - 1999 Replacement for Bruin 350 4x4 (YFM350FA) 2004 - 2006 Replacement for Bruin 350 2x4 (YFM350A) 2004 - 2006 Replacement for Grizzly 350 2x4 (YFM350G) 2007 - 2011 Replacement for Grizzly 350 4x4 (YFM350FG) 2007 - 2014 Replacement for Grizzly 350 4x4 IRS (YFM350FGI) 2007 - 2011 Replacement for Moto-4 350 (YFM350ER) 1987 - 1995 Replacement for Raptor 350 (YFM350R) 2004 - 2013 Replacement for Warrior 350 (YFM350X) 1987 - 2004 Replacement for Wolverine 350 4x4 (YFM350FX) 1995 - 2005 Replacement for Wolverine 350 2x4 (YFM350X) 2006 - 2009. Package List: 1 x ATV Cylinder Kit (12PCS) Note: 1. Please double check the part number of your item, matching information is for reference only.2. If you are unsure of the item, please contact us before buying to avoid unnecessary return, thanks!