This 67mm cylinder piston gasket kit is designed for use in engines experiencing cylinder blow-by, low compression, or piston seizure.The kit includes a cylinder, piston, piston rings, wristpin, circlips, and a complete gasket set consisting of cylinder base gasket, cylinder head gasket, exhaust gasket, and valve stem seals.The piston features anodized treatment for improved heat resistance.Gaskets are made from materials selected for sealing performance.This kit is intended for standard bore applications with a 67.0 mm bore and 55.7 mm stroke, using a 16 mm steel piston pin.The compression ratio is 9.5:1.An automatic timing chain tensioner is required; this cylinder is not compatible with models equipped with a manual screw-type tensioner without modification.In some cases, machining of the gearbox housing may be necessary for proper installation.Fitment includes: - YFM200 Moto-4 200 (1985–1989) - YTM200 Tri-Moto 200 (1983–1985) - YTM200E Yamahauler 200 (1983–1985) - BW200/E Big Wheel 200 (1985–1988, requires automatic chain tensioner) - TW200 Trailway 200 (1987–2024) Replacement part numbers: - Cylinder: 21V-11310-00, 47J-11310-00 - Cylinder Base Gasket: 5VC-11351-02 - Cylinder Head Gasket: 1NU-11181-00 - Piston (Std): 36X-11631-00-A0 - Piston Pin: 58L-11633-00 - Piston Ring Set (Std): 15A-11603-00 - Circlips (2): 93450-17044 - Valve Stem Seals (2): 5H0-12119-00 Package includes: - 1 x Cylinder - 1 x Piston - 1 x Piston Ring Set - 1 x 16 mm Wristpin - 1 x Set of Circlips (2 pieces) - 1 x Cylinder Base Gasket - 1 x Cylinder Head Gasket - 1 x Exhaust Gasket - 2 x Valve Stem Seals Verify compatibility by comparing dimensions and configuration with your existing components before installation.