Big Bore Kit

YFZ450 YFZ 450 Big Bore Stroker Webcams +1 Valves Complete 500cc Rebuild Kit


YFZ450 YFZ 450 Big Bore Stroker Webcams +1 Valves Complete 500cc Rebuild Kit
YFZ450 YFZ 450 Big Bore Stroker Webcams +1 Valves Complete 500cc Rebuild Kit

YFZ450 YFZ 450 Big Bore Stroker Webcams +1 Valves Complete 500cc Rebuild Kit    YFZ450 YFZ 450 Big Bore Stroker Webcams +1 Valves Complete 500cc Rebuild Kit

FITS ALL YAMAHA YFZ450 CARB MODELS AND YEARS! COMPLETE BIG BORE STROKER WITH ALL THE GOODIES.

98mm BP Racing big bore cylinder. Hotrods 3mm stroker crank with rod. Wiseco CP or JE forged piston. Webcams #943 grind camshaft set. Kibblewhite +1mm stainless intake and exhaust valves.

This is a bolt on kit with no machining required. Piston uses pump or race gas. Please check your order thoroughly when receiving it.

We recommend that this kit be installed by a qualified mechanic with experience working on these types of motors. Piston comes with specific instructions for setting the ring gap. If you do not follow these exactly your motor will fail.


YFZ450 YFZ 450 Big Bore Stroker Webcams +1 Valves Complete 500cc Rebuild Kit    YFZ450 YFZ 450 Big Bore Stroker Webcams +1 Valves Complete 500cc Rebuild Kit