Description:

Compatible with Piston: Yamaha 4GB-11638-00-00, 4GB-11636-00-00, 4GB-11631-00-Y0. Compatible with OEM Gasket Base Gasket: Yamaha 4KB-11351-00-00, 3GD-11351-00-00, Head Gasket: Yamaha 1UY-11181-01-00, 1UY-11181-00-00. Compatible with Yamaha 2000-2004 Big Bear 400 2x4, 2000-2012 Big Bear 400 4X4. Compatible with Yamaha 1993-1998 Kodiak 400. Piston Diameter: 84mm, Type: Concave.