The Cylinder Works 10010-K04 Standard Bore Cylinder Kit is a complete top-end replacement designed for select Honda CRF450X, CRF450L, and CRF450RL models from 2019 through 2023. This kit uses a standard-bore cylinder and a 12.0:1 high-compression piston configuration to support dependable engine performance, consistent power delivery, and long service life. The cylinder maintains a stock-style appearance for a clean, factory-like installation.
Each kit includes the cylinder, matched Vertex piston kit, piston rings, piston pin, circlips, and the required top-end gaskets. Cylinder Works matches the cylinder and Vertex piston components to promote proper fitment, durability, reduced engine noise, and reliable operation. The top-end gasket kit does not include valve stem seals, so those components should be inspected and replaced separately when required. No machine work is needed for installation when used with the applicable standard-bore application and properly prepared components.
Feature: Complete standard-bore cylinder kit with 12.0:1 compression ratio
Feature: Includes cylinder, Vertex piston kit, rings, pin, circlips, and gaskets
Feature: Nickel silicon carbide-plated cylinder for improved wear resistance and extended service life
Feature: Stock-style cylinder appearance for an original-equipment look
Feature: Matched piston and cylinder components help support longevity, performance, and reduced engine noise
Feature: Replacement pistons, gaskets, and ring sets are available separately
Feature: Standard-bore replacement design intended for compatible Honda applications
The Cylinder Works 10010-K04 fits 2019 Honda CRF450X and CRF450L, 2020 Honda CRF450L and CRF450X, 2021 Honda CRF450X and CRF450RL, 2022 Honda CRF450RL and CRF450X, and 2023 Honda CRF450X and CRF450RL models. Verify the motorcycle model and year before installation to ensure correct fitment.
Features:
- Complete standard-bore cylinder kit with a 12.0:1 compression ratio
- Includes cylinder, matched Vertex piston kit, piston rings, piston pin, circlips, and gaskets
- Nickel silicon carbide-plated cylinder helps improve wear resistance and service life
- Stock-style cylinder appearance supports a factory-like installation
- Matched cylinder and piston components promote longevity, performance, and reduced engine noise
- No machine work is needed for applicable standard-bore installations
- Top-end gasket kit does not include valve stem seals
- Fits select 2019–2023 Honda CRF450X, CRF450L, and CRF450RL models
Fitment:
2019 Honda CRF450L
2019 Honda CRF450X
2020 Honda CRF450L
2020 Honda CRF450X
2021 Honda CRF450RL
2021 Honda CRF450X
2022 Honda CRF450RL
2022 Honda CRF450X
2023 Honda CRF450RL
2023 Honda CRF450X
2024 Honda CRF450RL
2024 Honda CRF450X
2025 Honda CRF450RL
2025 Honda CRF450X