86.5mm Cylinder Piston Rings End Kit for TRX420 Rancher 420 2007-2020 Cylinder Piston End Rebuild Kit compatible with TRX420 Rancher 420 4x4 models from 2007 to 2020.This kit is designed as a direct replacement for the specified engine type.The cylinder bore size is 86.5mm with a standard bore.The piston features a 9.9:1 compression ratio.Engine type is 4-stroke and intended for front placement on the ATV.Kit includes: 1 x Cylinder 1 x Piston Ring Kit (includes piston, piston rings, wristpin, and 2 circlips) 1 x Head Gasket 1 x Base Gasket 1 x Head Cover Gasket Gaskets are included to maintain a proper seal between engine components.The cylinder is 12100-7-a00 or 12100-5-600.Piston is 13101-5-600.Wristpin is 13111-5-600.Circlips is 13112-MAT-000.Base gasket is 12191-5-601.Head cover gasket is 12315-5-601.Head gasket is 12251-5-601 or 12251-7-a01.Color of components is gray.