MotoPartHQ stocks 531 Stoppers & Insulators, covering Kawasaki, Yamaha and S&S Cycle plus other brands. Typical orders include S&S Cycle Tappet Guide Lifter Blocks For Harley Big Twin and V-Twin Mfg.
Tappet Guide Set For Harley Sportster. Every listing states whether the part is genuine OEM or an aftermarket replacement.