YFZ450R Big Bore Rebuild Kit 98mm Top End Bottom Motor Engine Assembly 478cc Kit 21001 so you can keep tackling

so you can keep tackling the toughest terrain with confidence

precision-machined cylinder

FITS ALMOST ALL YAMAHA 700cc ATVs AND SIDE x SIDES BUT NOT ALL - CHECK FITMENT CHART ABOVE FOR YOUR VEHICLE

featuring an MLS Head Gasket for exceptional sealing

all trims)

YFZ450R Big Bore Rebuild Kit 98mm Top End Bottom Motor Engine Assembly 478cc Kit 21001 so you can keep tacklingNew BPR 98mm cylinder 98mm Wiseco CP or JE forged piston** Nitrite coated piston rings Chrome wrist pin Circlips Hotrods or Wiseco HD replacement crankshaft with rod Crank bearings Complete gasket kit MLS big bore head gasket Oil seal kit Valve stem seals Talon clutch kit Water pump bearing Piston uses a pump or race gas No case or head mods required Works on all Yamaha YFZ450R FI models and years 1 year warranty*