CYLINDER HEAD KIT 04-07 CRF250R, Cylinder Works - CH1003-K01, 04-06 CRF250X HONDA, 12010-KRN-A00
4.1 Trustpilot 99.9% positive on eBay
Free UK delivery 2–4 business days
Spread the cost with 18+, T&Cs apply
Cylinder Works Cylinder Head Kit CH1003-K01 is a premium replacement cylinder head kit manufactured for select Honda CRF250R and CRF250X models. It includes C630 valve seats and guides, a competition valve job, and is designed for higher lift cams. Features include cam caps and bolts, shortened valve guides, unshrouded combustion chamber, blended bowl seat to port, and stock-shaped ports. This kit is made in the U.S.A. Valves, springs, and lifters are sold separately. Cross-reference part number 12010-KRN-A00.
- SKU
- 56-H102.CW
- Brand
- Hot Rods
- Availability
- In Stock (2)
Fitments (7)
| Make | Model | Year |
|---|---|---|
| HONDA | CRF 250R | 2004 |
| HONDA | CRF 250R | 2005 |
| HONDA | CRF 250R | 2006 |
| HONDA | CRF 250R | 2007 |
| HONDA | CRF 250X | 2004 |
| HONDA | CRF 250X | 2005 |
| HONDA | CRF 250X | 2006 |
- General Product Group
- Engine
- General Product Type
- Cylinder Kits
- Variant Id
- 283197
FULL DESCRIPTION
Cylinder Works Cylinder Head Kit for Honda CRF250R/X
The Cylinder Works Cylinder Head Kit is a high-quality replacement cylinder head engineered for select Honda CRF250R and CRF250X models. This premium kit is manufactured with precision and utilizes durable materials to provide a dependable solution for engine rebuilds. It is designed to enhance engine efficiency and longevity.
Key Features:
- New replacement cylinder head designed for optimal performance.
- Includes cam caps and cam cap bolts for secure installation.
- Features C630 nickel/aluminum/bronze alloy valve seats and guides for exceptional durability.
- Equipped with a competition valve job for improved engine performance.
- Shortened valve guides are incorporated to accommodate higher lift camshafts.
- Features an unshrouded combustion chamber and a blended bowl seat to port for enhanced airflow.
- Stock-shaped ports ensure compatibility with standard engine configurations.
- Proudly made in the U.S.A.
Important Note: This kitdoes not include valves, springs, or lifters. These components must be purchased separately.
Cross-Reference Part Number: 12010-KRN-A00
QUESTIONS? JUST ASK
Talk to John or Phil. Real people, Monday to Friday, 10:00 to 17:00.
Check the fitment table on this page against your make, model and year. Not sure? Call or email us and we will check it for you before you order.
UK delivery is £4.99, or free on orders over £60. Orders ship within 3 working days, then delivery takes 2–4 business days. Delivery details
Yes. You have 14 days from delivery to return it, unused and in its original packaging. Contact us first and we will send you the return instructions. Returns policy
By card, PayPal, Apple Pay or Google Pay, or spread the cost with Klarna. Payment is taken securely by Stripe, and the options for your order are shown at checkout.
More answers in our FAQ.
Trade pricing available
Buying parts for your business? Apply for a 2BrosParts trade account.


