Cylinder Works 21005-K01 Big Bore Cylinder Kit – 99.00 mm – Yamaha

Maximize your Yamaha's power with the Cylinder Works 21005-K01 Big Bore Cylinder Kit. This bolt-on kit includes a cylinder, Vertex piston, and top-end gaskets for enhanced performance. We price-match reputable online stores—contact us to ensure you get the best deal!

✅ What’s Included

• Big Bore Cylinder (99.00 mm)

• Vertex Piston Kit (piston, rings, pin, clips)

• Top-End Gasket Kit

🔑 Key Features

• Big bore design increases displacement to 470 cc (+2.00 mm overbore)

• Nickel-silicon carbide-plated cylinder for durability and long life

• Includes matched Vertex pistons for longevity and reduced engine noise

• Virtually identical to OEM cylinders

• Made in the U.S.A.

• Compression ratio: 12.5:1

• No machine work required

• Warning: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

📦 Fitment (Highlights)

• Yamaha:

  • 2010-2013 YZ450F

• Notes: Always verify fitment by year, make, model, and engine specifications before ordering. Replaces OEM part number: 33D113110000.

💲 Price & SKU

• Retail Price: $834.95

• SKU: 0931-0354 / 21005-K01

• Note: We price-match reputable online stores—contact us for the best price!

• Weight: 4.45 lbs

• Dimensions: 6.85" (H) × 11.29" (L) × 8.46" (W)

• Availability: In stock. Ships next business day

🛡️ Warranty

• Contact Cylinder Works for warranty details (proof of purchase required)