Engineworx Gasket Kit (Top Set) Yamaha YZ450F 06-09 WR450F 07-15 Parts Contain all bearings

Contain all bearings

Open handguard

300 RR 20-23

Kits include all gaskets and oil seals necessary to rebuild the engine and transmission including head & base gaskets

06 and Exceeds new FIM standards

Engineworx Gasket Kit (Top Set) Yamaha YZ450F 06-09 WR450F 07-15 Parts Contain all bearingsEngineworx Gasket Kit (Top Set) Yamaha YZ450F 06 09 WR450F 07 12 Engineworx Top End Gasket Kits are the new leader in OEM replacement engine gasket kits. Kits include gaskets and seals necessary to rebuild the top end of your engine. All 4 Stroke head gaskets use Japanese stainless steel laminated head gasket and Viton valve seals, ensuring the best quality possible.