YFZ450R YFZ 450R Crank Cases 98mm Big Bore Stroker 520cc Rebuild Hotcams Valves All Balls Racing COSTS THE SAME AS OEM

COSTS THE SAME AS OEM STUDS DO

Material: AFM

Stock bore for 750 / +2mm bore for 700

rolled threads studs

WE STOCK THE SAME PARTS LIKE PISTONS

YFZ450R YFZ 450R Crank Cases 98mm Big Bore Stroker 520cc Rebuild Hotcams Valves All Balls Racing COSTS THE SAME AS OEMFITS ALL YAMAHA YFZ450 FI MODELS AND YEARS! 520cc OF BOLT ON POWER! 98mm NEW DESIGN big bore cylinder BRAND NEW OEM CRANKCASES Wiseco JE or CP forged piston** Hi temp piston rings Chrome wristpin Circlips +5mm Crankworks stroker crankshaft with rod assembled and welded at pin Stage 3 Hotcams Pro X valve springs OEM retainers and collars Pro X intake and exhaust valves Kibblewhite viton valve stem seals MAXLOCK head stud kit LIFETIME WARRANTY* Clutch