YFZ450R 98mm Big Bore Top End Kit Wiseco Cylinder (2009–2025)

YFZ450R 98mm Big Bore Top End Kit Wiseco Cylinder (2009–2025)

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Yamaha YFZ450R / YFZ450X 98mm Big Bore Top End Rebuild Kit – Wiseco Piston, Cylinder & Gaskets (2009–2025)

🛠️ Add amazing, reliable power to your YFZ450R or YFZ450X with this complete 98mm Big Bore Top End Kit. Designed for fuel-injected models, this package features a custom BPRATV Nikasil-plated cylinder and Wiseco Armor Glide piston—engineered for durability and serious performance on pump or race fuel.


✅ What’s Included:

  • BPRATV 98mm Big Bore Nikasil Plated Cylinder (1-Year Warranty)

  • Wiseco 98mm 12.75:1 Armor Glide Piston Kit (Piston, Rings, Wrist Pin, Circlips)

  • Cometic Big Bore Top End Gasket Kit

  • Kibblewhite Red Viton Valve Stem Seals (x5)

  • NGK Iridium Spark Plug


📦 Fitment:

  • Fits: Yamaha YFZ450R & YFZ450X (Fuel Injected Models Only)

  • Years: 2009–2025


🛡️ Warranty Info:

  • Cylinder: 1-Year Warranty against manufacturer defects

  • All Other Parts: Standard limited warranty against defects in materials/workmanship

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