Yamaha WR450F / YZ450F 95 mm High-Compression Cylinder Kit – Cylinder Works (20003-K01HC)

Unleash extra torque and throttle response with this direct-bolt-on 95 mm Cylinder Works high-compression kit. Designed for serious trail or track use, it bumps your compression to 13.5 : 1 while maintaining OEM reliability and appearance. No replating or machining needed — just install and ride.

✅ What’s Included

• 95 mm Nickel-Silicon-Carbide–plated cylinder

• Vertex forged piston kit (piston, rings, pin, and circlips)

• Complete top-end gasket kit

📦 Fitment

• 2007 – 2015 Yamaha WR450F

• 2006 – 2009 Yamaha YZ450F

Direct OEM replacement for part numbers 2S2111810000, 2S2113110000, 2S2113510000, 2S2116311000.
No case mods or replating required.

🛡️ Warranty Info

• 1-year manufacturer warranty on materials and workmanship

• Made in the USA using premium alloys and precision machining

• Not legal for sale or use in California on pollution-controlled vehicles (Prop 65 applies)

🔑 Key Features

• High-compression 13.5 : 1 design for more horsepower and throttle response

• Ready-to-install gray finish matches OEM appearance

• Nickel-silicon-carbide plating for extended cylinder life and low friction

• Vertex piston pairing ensures precise fit and reduced engine noise

• Complete bolt-on solution with no replating required

💲 Price & SKU

Price: $730.95
SKU / Part Number: 0931-0299 | Cylinder Works 20003-K01HC
Estimated Shipping Weight: 4.38 lbs
Handling Time: Ships Next Business Day