Yamaha YFZ450R/X Big Bore 98mm Engine Rebuild Kit – EFI Models

SKU: 265244929328FITS ALL YAMAHA YFZ450R & YFZ450X FUEL-INJECTED MODELS AND YEARS Looking to rebuild and upgrade your YFZ450R or YFZ450X engine? This complete 98mm performance rebuild kit is engineered for serious riders and racers. With top-tier components, this kit boosts power and reliability without needing case mods. ✅ Kit Includes: 98mm BPR Big Bore Cylinder Wiseco, JE, or CP forged hi-compression piston High-temperature piston rings Chrome wristpin and circlips Hotrods or Wiseco crankshaft with connecting rod Clutch kit (Fibers, Steels, Springs – for 2009–2014 models) Main bearings Counter balancer bearings Transmission bearings Shift cam bearing Water pump bearing Mechanical seal Complete top & bottom end gasket kit MLS big bore head gasket Complete crankcase oil seal kit Valve stem seals Heavy-duty cam chain Heavy-duty head stud kit 🔧 Built for: EFI (fuel-injected) YFZ450R and YFZ450X models Stock or modified head setups