YAMAHA YFZ450 CARBURETOR REPAIR KIT BY ALL BALLS - 226-1454Kits include all of the necessary components to repair a carburetor Kit includes all O rings, gaskets, jets, needle, mixture screw, float bowl screws, float valve needle and seat. OEM jet sizes are included in the kit. NBR rubber material is used on all O rings and rubber gaskets NBR has excellent resistance to the ethanol used in todays fuels. Applications that use paper float bowl gaskets are upgraded to High Performance Interface Gasket material.