Upgrade the top end of your Yamaha performance engine with the Cylinder Works CW20012K01 97.00 mm standard bore high-compression cylinder kit. Designed with a 12.8:1 compression ratio, this complete kit includes the cylinder, matched piston kit and required gaskets for a reliable replacement or performance-focused rebuild. The cylinder maintains a stock-like appearance while providing durable construction for demanding riding conditions.
Each Cylinder Works kit is matched with a Vertex piston to support long service life, consistent performance and reduced engine noise. The cylinder features a nickel silicon carbide plating process that helps improve durability and wear resistance. No machine work is needed for installation when used with the specified standard-bore application, simplifying the top-end service process. The top-end gasket kit is included but does not contain valve stem seals.
Designed for fitment on select Yamaha models, this kit fits the 2018 Yamaha YZ450F, 2019 Yamaha YZ450F, 2019-2020 Yamaha YZ450FX and 2019-2020 Yamaha WR450F. Verify model year, engine specifications and compression requirements before installation. Cylinder Works also offers replacement pistons, gaskets and ring sets to support future maintenance. Manufacturer part number CW20012K01 and vendor part number 422-20012K identify this complete standard-bore cylinder kit.
Features:
- Complete 97.00 mm standard-bore high-compression cylinder kit
- 12.8:1 compression ratio for improved engine performance
- Includes cylinder, Vertex piston kit and gaskets
- Nickel silicon carbide plated cylinder for extended service life
- Stock-like cylinder appearance
- Matched Vertex piston helps support longevity, performance and reduced engine noise
- No machine work needed for the specified application
- Top-end gasket kit does not include valve stem seals
- Replacement pistons, gaskets and ring sets are available
- Fits 2018 Yamaha YZ450F, 2019 Yamaha YZ450F, 2019-2020 Yamaha YZ450FX and 2019-2020 Yamaha WR450F
- Brand: Cylinder Works
- Manufacturer Part Number: CW20012K01
- Vendor Part Number: 422-20012K
Fitment:
2018 Yamaha YZ450F
2019 Yamaha WR450F
2019 Yamaha YZ450F
2019 Yamaha YZ450FX
2020 Yamaha WR450F
2020 Yamaha YZ450FX