For TRX450 TRX450 S/ES/FE/FM 1998-2004 Motorcycle Engine Cylinder Kit with Piston Rings Gasket 90mm 450cc Engine Cylinder Engine cylinder kit compatible with TRX450 models from 1998 to 2004 including S, ES, FE, and FM variants.Includes a 90mm cylinder, piston rings, and gasket designed for 450cc engine rebuilds.Components are engineered to meet specifications for proper fit and function.Suitable for use in engine overhauls requiring replacement of worn or damaged parts. This is a replacement item from an aftermarket supplier.Brand names are cited solely to demonstrate device compatibility.