50cc Cylinder Piston Gaskets End Kit For Orbit II 25 50 4 Symphony If the cylinder is blown, compression is low, or a piston seizure has occurred, this kit provides the necessary components for repair.The kit includes a cylinder, piston, piston rings, wristpin, circlips, and a complete end gasket set as shown in the image.The cylinder is constructed from aluminum for efficient air cooling and features an internal cast iron liner.functiongrade materials are used for the gaskets to enhance and sealing.This kit is designed for standard bore applications with a bore diameter of 37 mm and a displacement of 49cc.It uses a 10 mm steel wristpin with an overall length of 28 mm.The total cylinder height is 74 mm, with a sleeve outer diameter of 44 mm and diagonal hole spacing of 76.5 mm.Replacement part numbers included for reference: Cylinder: 12101-AMA-000 Cylinder Base Gasket: 12191-AWA-000 Cylinder Head Gasket: 12251-A1A-000 Piston: 12101-A1A-000 Piston Ring Set (Std): 13010-A1A-000 Cam Chain Adjust Gasket: 14555-AMA-000 Fits models: Orbit II 25km/h AIR 4T E3 2009–2015 Orbit II 25km/h AIR 4T E4 2018 onward Orbit II 50 AIR 4T E3 2008–2015 Orbit II 50 AIR 4T E4 2018 onward 4 25km/h AIR 4T E3 2010–2015 4 50 AIR 4T E3 2010–2015 Symphony 25km/h AIR 4T E3 2009–2014 Symphony 50 AIR 4T E3 2009–2014 Symphony SR 25km/h AIR 4T E3 2010–2015 Symphony SR 25km/h AIR 4T E4 2018 onward Symphony SR 50 AIR 4T E3 2010–2017 Package includes: 1 x 37mm Cylinder 1 x Piston 1 x Piston Ring Set 1 x 10mm Wristpin 2 x Circlip 1 x Cylinder Base Gasket 1 x Cylinder Head Gasket 1 x Cam Chain Adjust Gasket