Complete Cylinder Piston End Kit for LT 50 LT-A 50 JR 50 1978-2006 This engine cylinder end rebuild kit is designed for users experiencing issues such as blown cylinder, low compression, or piston seizure.The kit includes all necessary components for a full cylinder end rebuild.Kit includes Cylinder Cylinder head Piston Piston rings (2) Piston pin Circlips (2) Wristpin needle bearing Cylinder base gasket Cylinder head gasket Spark plug Cylinder studs (4) Cylinder stud nuts (4) Specifications Condition: Aftermarket, brand Cylinder material: Steel Piston material: Aluminum Displacement: 49cc Bore type: Standard bore Bore size: 41.00 mm Stroke: 37.80 mm Pin diameter: 12mm Pin overall length: 33.7mm Compression ratio: 5.6:1 Replacement part numbers Cylinder: 11210-04012-0F0, 11211-04002-0F0 Cylinder head: 11111-04001 Cylinder base gasket: 11241-04010 Cylinder head gasket: 11141-04000 Piston: 12110-43000 Piston pin: 12151-04700 Piston rings: 12140-16B10 Circlips: 09381-12001 Wristpin needle bearing: 09263-12023 Spark plug: 09482-00205 Cylinder studs: 09108-06108 Cylinder stud nuts: 08319-31067 Fitment JR50 1978–2006 LT50 Quadrunner 50 1984–1987 LT-A50 Quadmaster 50 2002–2005 Note: For the LT50, the cylinder does not include a vacuum port near the intake that connects to the petcock.This port can be drilled if needed, or the line can be disconnected as it is not required.Please compare your existing unit and the provided images to confirm compatibility.This product is not manufactured by the brand.Model and brand mentions are for compatibility guidance only.