1998 Yamaha YZ400F Top End Gasket Kit - 92mm Bore, Manufacturer: Cometic Gasket, TOP END KIT STD YZ400 (399cc) Fits: 1998 Yamaha YZ400F, TOP END KIT STD YZ400 (399cc) Top End Gasket Kit - 92mm Bore TOP END KIT STD YZ400 (399cc) Manufacturer: Cometic Gasket Photos are for reference only, please read title and product description carefully.