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Boost Your Honda XR400R RFVC's Performance With KPMI® Red Viton Valve Stem Seals
Hot Cams timing chain & more
020" fiber Cometic base gasket
Water pump impeller with shaft
PW50 PW 50 Y-Zinger Yzinger Stock Bore WISECO Piston COMETIC Studs Rebuild Kit KVF650 Boost Your Honda XR400R RFVC'sComplete Yamaha PW50 top end rebuild kit including 40mm cylinder, cylinder head, Wiseco forged piston, Cometic gasket kit, NGK spark plug, and titanium studs. 1981 2025 Yamaha PW50 Y Zinger Stock Bore Complete Top End Rebuild Kit Wiseco Piston Product Description Restore the legendary reliability of your 1981 2025 Yamaha PW50 Y Zinger with this premium BPRATV Complete Stock Bore Top End Rebuild Kit. Whether you're refreshing a well loved trail bike or