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Ships within 48 hours · Estimated delivery Jul 31 - Aug 5
this complete kit transforms your stock 400 into a hard-pulling 440cc powerhouse built for competition
The piston’s nitrite-coated rings provide superior durability
By replacing the heavy stock studs with lightweight yet strong titanium
Titanium retainers
YFZ450 YFZ 450 Big Bore Stroker Kit 500cc Complete Stage 3 Cams Valves +3 Crank TRSV421PL this complete kit transforms yourFITS ALL YAMAHA YFZ450 MODELS AND YEARS CARB MODEL ONLY! 98mm BPRATV cylinder Hotrods +3 stroker crank with rod Wiseco CP or JE forged piston** Hi temp piston rings Wristpin Circlips Main bearings Crank balancer bearings Transmission bearings Shift cam bearing Water pump bearing Complete gasket kit Complete seal kit Cam chain Head stud kit Kibblewhite chrome silicone valve springs Titanium retainers Heat treated collars Viton valve stem seals