The athena top end gasket kit for yamaha wr250 1991-1997 is part of the latest collection from athena.Features: specifically designed for the pro, semi-pro and amateur rider who freshens up their engine prior to a race or during midseason kit includes a top-of-the line mlss head gasket and two or more premium quality base gaskets of different thicknesses to optimize engine compression ratios gives the rider a choice of using standard gas with stock compression, or race gas with a higher compression kits include a top-of-the line mlss head gasket and two or more premium quality base gaskets of different thicknesses to optimize engine compression ratios gives the rider a choice of using standard gas with stock compression, or race gas with a higher compression kit do not includes valve stem seals, rubber part, shims or other fiber gaskets. Kits do not include valve stem seals, rubber parts, shims, or other fiber gaskets specifications: engine type: 2-stroke material: rubber product name: gasket kit research value: finalized riding style: off-road type: top end units: kit to fit: yamaha wr 250 z 1991 american models yamaha wr 250 z 1992 american models yamaha wr 250 z 1993 american models yamaha wr 250 z 1994 american models yamaha wr 250 z 1995 american models yamaha wr 250 z 1996 american models yamaha wr 250 z 1997 american models yamaha wr 250 1991 american models yamaha wr 250 1992 american models yamaha wr 250 1993 american models yamaha wr 250 1994 american models yam...