Outlaw Racing OR4028 Top End Gasket Complete Set Yamaha YZ125 1990-1991 Dirt Kit Exactly what you need to get your bike or ATV rebuilt and running right! Made to exact OEM specs but with better materials such as Stainless Steel, Fluoroviton, and Teflon so it lasts longer. Kits will contain the exact gaskets, seals, and O-rings you need to re-assemble your top end after a standard rebuild (Set is for stock bore). Requires no trimming or modification!