The Cylinder Works 20005-K02 Cylinder Kit is a complete standard-bore replacement kit designed for select Yamaha 450F four-stroke motorcycles. This high-compression kit uses a 97.00 mm bore and a 12.5:1 compression ratio to support strong engine performance while maintaining a stock-style appearance. It is engineered for riders and technicians seeking a dependable top-end replacement without unnecessary machine work.
The kit includes the cylinder, matched Vertex piston kit and required gaskets for a complete installation. The piston and cylinder are matched to help promote longevity, consistent performance and reduced engine noise. The cylinder features nickel silicon carbide plating for enhanced durability, wear resistance and extended service life. Its stock-like appearance makes it a practical choice for restoration, maintenance or performance-focused engine work.
Fitment includes the 2014 and 2015 Yamaha YZ450F, 2016 and 2017 Yamaha YZ450F, 2016 through 2018 Yamaha YZ450FX, and 2016 and 2017 Yamaha WR450F. Verify the motorcycle model and year before ordering. The top-end gasket kit does not include valve stem seals. Replacement pistons, gaskets and ring sets are available separately, and this kit is intended as a complete high-compression standard-bore solution for compatible applications.
Features:
- Complete 97.00 mm standard-bore high-compression cylinder kit
- 12.5:1 compression ratio for enhanced engine performance
- Includes cylinder, matched Vertex piston kit and gaskets
- Nickel silicon carbide-plated cylinder for extended durability and service life
- Stock-style cylinder appearance
- No machine work required for compatible applications
- Matched piston and cylinder help promote longevity, performance and reduced engine noise
- Top-end gasket kit does not include valve stem seals
- Replacement pistons, gaskets and ring sets are available separately
- Fits 2014-2017 Yamaha YZ450F, 2016-2018 Yamaha YZ450FX and 2016-2017 Yamaha WR450F
- Brand: Cylinder Works
- Manufacturer Part Number: 20005-K02
- Vendor Part Number: 422-20005K2
Fitment:
2014 Yamaha YZ450F
2015 Yamaha YZ450F
2016 Yamaha WR450F
2016 Yamaha YZ450F
2016 Yamaha YZ450FX
2017 Yamaha WR450F
2017 Yamaha YZ450F
2017 Yamaha YZ450FX
2018 Yamaha WR450F
2018 Yamaha YZ450FX