Honda CRF250R/X (2004–2007) High-Flow Cylinder Head Kit – Cylinder Works
Honda CRF250R/X (2004–2007) High-Flow Cylinder Head Kit – Cylinder Works Description Unleash race-winning flow — the Cylinder Works CH1003-K01 (0930-0129) High-Flow Cylinder Head Kit is a bolt-on, USA-made performance head for 2004–2007 Honda CRF250R & CRF250X. Featuring C630 nickel-aluminum-bronze valve seats & guides, competition valve job, unshrouded combustion chamber, blended bowls, and shortened guides for high-lift cams — all with stock-shaped ports for seamless compatibility. Valves, springs, and lifters not included.
What’s Included
- New Replacement Cylinder Head (fully machined)
- Cam Caps & Cam Cap Bolts
- C630 Nickel/Aluminum/Bronze Valve Seats & Guides (pre-installed)
Key Features
- Competition valve job — max airflow, instant throttle response
- Unshrouded combustion chamber — improved flame travel, more power
- Blended bowl-to-port transition — smoother flow, higher RPM ceiling
- Shortened valve guides — supports high-lift cams without binding
- Stock port shape — plug-and-play with OEM intake/exhaust
- Made in the USA — pro-level precision, race-proven durability
Fitment Fits the following models and years:
- 2004–2007 Honda CRF250R
- 2004–2006 Honda CRF250X
Warranty Info Backed by Cylinder Works limited warranty. Professional installation required. WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Price & SKU Retail Price: $548.95 SKU: 0930-0129 / CH1003-K01 Estimated Shipping Weight: 6.3 lbs Handling Time: Ships next business day
📦 Shipping Information
In-Stock Items:
- Most parts ship next business day
- Modquad parts: Monday–Thursday dispatch
Made-to-Order Items:
- Custom swingarms & A-arms: 2–4 weeks
- EVP exhaust systems: 2–4 weeks
- Sneakers: 1–2 weeks
Stock Guarantee: Items marked "In Stock" ship immediately. Made-to-order items are built fresh for you.
Questions? Contact us—we respond within 24 hours.
