Yamaha YFZ450R 12.5:1 CP Carrillo Piston Kit 98mm 478cc Big Bore Cometic Gasket

Yamaha YFZ450R/X 478cc Big Bore Top End Kit | 98mm CP Piston + Cylinder + Cometic

🔥 Turn Your YFZ450R into a 478cc Powerhouse

Unleash the full potential of your fuel-injected Yamaha YFZ450R / YFZ450X with this premium 98mm Big Bore Top End Rebuild Kit. Boost displacement to 478cc and compression to 12.5:1 for harder hit, stronger midrange, and top-end pull—whether you’re chasing holeshots or carving technical trails.

📦 What’s Included

Race-ready components, brand new in original packaging for a seamless install.

• BPRATV 98mm Big Bore Nikasil Cylinder – performance plated, built for heat control & durability (1-year warranty on cylinder*)
• CP-Carrillo 98mm Forged Piston Kit – piston, rings, wrist pin & clips for precise sealing and longevity
• Cometic Top End Gasket Kit – MLS head gasket for dependable, high-pressure sealing
• Works with pump or race gas (tune as needed)
• All components are brand new and covered by manufacturer warranties

⚙️ Performance Highlights

Engineered to deliver reliable power gains with OEM-plus fit and finish.

• Displacement increase to 478cc for instant torque & throttle response
• 12.5:1 compression for crisp low-end grunt and stronger mid/top
• Forged CP piston for high RPM stability and durability
• Nikasil cylinder plating for superior wear and heat transfer
• Cometic MLS sealing to prevent blow-by and fluid leaks

✅ Compatibility & Fitment

Designed for Yamaha fuel-injected 450 sport quads.

• Yamaha YFZ450R (EFI) – 2009–2026
• Yamaha YFZ450X (EFI) – All Years
• Replaces stock top-end with 98mm big bore components
• Compatible with pump or race fuel (octane per tune)
• Professional installation and tuning recommended for best results

❓ Frequently Asked Questions (FAQ)

• Q: Do I need a tune after installing this kit?

  A: Yes—EFI mapping should be adjusted to optimize fueling and ignition for the 98mm/478cc setup.

• Q: Will this work with stock head and valves?

  A: Yes. It’s engineered to pair with a healthy stock top end; porting/valve upgrades can add more gains.

• Q: Pump gas or race gas?

  A: Either. Many riders run premium pump gas with a proper tune; race gas is recommended for aggressive builds/conditions.

• Q: What is covered by the warranty?

  A: Cylinder has a 1-year limited warranty from BPRATV; other parts carry the original manufacturer’s warranty.*

🌟 Why Buy from BPRATV? Your YFZ450R Performance Experts 🌟

At BPRATV, our promise is unwavering: The Best Parts. The Best Performance. The Best Price. This YFZ450R 98mm Big Bore Top End Kit reflects that commitment with proven brands, precise fitment, and real-world gains. Trust BPRATV to deliver the parts you need to keep your YFZ450R performing its best, every single time.

Install with confidence and feel the 478cc difference on your next ride! 🏁

BPRATV - The Best Parts. The Best Performance. The Best Price.

BRAPPPPPPPPPP!

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