YFZ450R YFZ 450R Wiseco 12.4 Piston 95mm Stock Bore Cylinder Top End Rebuild Kit

YFZ450R YFZ 450R Wiseco 12.4:1 95mm Piston + Stock Bore Cylinder Top End Kit

Complete Performance Top End Rebuild Package

This premium top end rebuild kit is built around the race-proven Wiseco 12.4:1 Armor Glide Piston and our BPRATV Nikasil Stock Bore Cylinder, delivering exceptional reliability, improved throttle response, and increased power for your Yamaha YFZ450R / YFZ450X fuel-injected model.

🔥 Key Features & Benefits

Engineered for riders who demand proven strength, consistent compression, and long-term durability.

• Brand new BPRATV 95mm Stock Bore Nikasil Cylinder with 1-year warranty
• Wiseco 12.4:1 forged piston for strong, efficient power gains
• Cometic MLS head gasket ensures perfect sealing under high compression
• Kibblewhite Viton valve stem seals for optimal oil control
• Includes Genuine KPMI RED Viton Stem Seals (no bait-and-switch blues!).
• Includes NGK Iridium spark plug for maximum ignition performance

✅ Compatibility

Designed exclusively for Yamaha fuel-injected 450R platforms.

• Yamaha YFZ450R (Fuel Injected)
• Yamaha YFZ450X (Fuel Injected)
• Model years 2009–2025
• Direct bolt-on top end replacement
• Compatible with pump or race gas

❓ Frequently Asked Questions (FAQ)

• Q: Does this kit require machining?

  A: No. All components are direct bolt-on replacements.

• Q: Is the cylinder brand new?

  A: Yes. The BPRATV cylinder is 100% new and Nikasil plated with a 1-year warranty.

• Q: Does the Wiseco piston include all components?

  A: Yes. It includes piston, rings, wrist pin, and clips.

• Q: What fuel should I run with the 12.4:1 piston?

  A: Pump gas works for most setups; race gas is optional for maximum performance.

🌟 Why Buy from BPRATV? Trusted Performance Experts 🌟

At BPRATV, our promise is unwavering: The Best Parts. The Best Performance. The Best Price. Every component in this kit is selected for reliability, strength, and power output to ensure your Yamaha YFZ450R / YFZ450X runs at its absolute best. Trust BPRATV to keep your machine performing at the highest level, every single time.

Upgrade your YFZ450R today with the most trusted top end kit in the industry!

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

BRAPPPPPPPPPP!

© BPRATV LLC 1-year limited warranty from the manufacturer for material or workmanship defects.*

Due to the nature of high performance and racing applications, BPRATV LLC components are sold without express warranty or any implied warranty of merchantability or fitness for a specific purpose. BPRATV LLC shall not, under any circumstances, be liable for any specific, incidental or consequential damages, including, but not limited to, damage, or loss of property or equipment, loss of profits or revenue(s), cost of purchased or replacement goods, or claims of customers of the purpose, which may arise and/or shall result from sale, installation or use of these parts. Installation of these parts may void vehicle manufacturers warranty coverage and/or may cause the vehicle to be illegal in some locations.

This product is exempt from the emission standards and related requirements of 40 C.F.R. § 1051 as provided by 40 C.F.R. § 1051.620, and California law [e.g., vehicle code§§ 27156 and 38391]. This product is sold only for use in connection with EPA -certified, purpose-built, nonroad vehicles used solely for closed course, nonroad competition/racing and not used for any recreational purpose or on public highways or right of ways maintained by and open to the public. This product is sold only in connection with machines that do not fall under state and/or federal noise or emission standards/regulations. Purchasers who/that purchase this product represent and warrant that the product is purchased only in connection with EPA -certified, emission-regulations-exempt and noise-regulations-exempt competition/racing vehicles as interpreted under applicable state and/or federal law.