Cylinder Works Big Bore Cylinder Kit 11001-K01 — Honda CRF250R / CRF250X 2004-2017

Product Description

Transform your bike's power output with the Cylinder Works 11001-K01 Big Bore Cylinder Kit. Designed to increase your displacement to 277cc, this kit is the ultimate solution for riders looking to regain lost compression or gain a competitive edge on the track and trails. Engineered for durability and high-performance, this kit turns your Honda CRF250 into a torque-heavy machine without the need for complex machine work.

Each kit is proudly made in the USA and features a nickel silicon carbide cylinder sleeve for superior wear resistance and heat dissipation. By pairing the cylinder with a high-quality, matched Vertex piston, Cylinder Works ensures reduced engine noise, improved longevity, and maximum power delivery across the entire RPM range.

Top Features: Cylinder Works Big Bore Cylinder Kit

• Increased displacement to 277cc for significant power gains.
• Includes precision-matched Vertex piston for optimal longevity and performance.
• Nickel silicon carbide cylinder sleeve provides industry-leading friction reduction.
• Bolt-on installation design—no machine work required for assembly.

Please review the detailed compatibility data below to ensure an exact fitment match for your motorcycle before finalizing your purchase.

Fitment List

Frequently Asked Questions

Q: Does this kit require any modifications to my engine cases?
A: No, the Cylinder Works big bore kits are designed to be a direct bolt-on installation. You do not need to perform any machine work to the crankcases.

Q: What is included in the box?
A: This kit is comprehensive and includes the cylinder, the matched Vertex piston, piston rings, wrist pin, clips, and the necessary top-end gaskets.

Expert Pro-Tip

Expert Pro-Tip: When installing a big bore kit, do not rush your break-in period. Even with modern nickel silicon carbide sleeves, you need to heat-cycle the engine properly. Run the bike for 15-20 minutes, letting it fully cool down between sessions, to ensure the rings seat correctly against the new bore. Also, ensure your jetting or fuel mapping is adjusted to account for the increased displacement; a lean condition on a new big bore kit can ruin your investment in minutes.

Recommended Pairings

Recommended Pairings:
o Honda CRF250R Performance Parts & Upgrades
o Premium Motorcycle Chemicals & Coolants
o Honda 4-Stroke Performance Parts

About Moto-House MX

At Moto-House MX, we carry the best brands in motocross and off-road performance. Our team has over 40 years of experience helping riders get more out of their bikes. Every order ships fast from our Central Florida location.

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