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Cylinder Works

Cylinder Works 04-07 Honda CRF 250 R 250cc Cylinder Head Kit

$592.95 $504.01 Save $88.94

SKU: C0BU CH1003-K01

In Stock
In Stock
Ships by Aug 1
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Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

Part #: CH1003-K01

OEM-style cast aluminum replacement cylinder head comes complete with cam caps and bolts for an out-of-the-box, ready-to-go installation. The unshrouded combustion chamber is designed to improve airflow, featuring a blended bowl and competition-grade valve job.

MIA's Description

The Cylinder Works CH1003-K01 High-Flow Cylinder Head Kit is a USA-made, bolt-on performance upgrade for Honda CRF250R (2004-2007) and CRF250X (2004-2006) off-road dirt bikes. It includes a complete cylinder head assembly with pre-installed C630 nickel-aluminum-bronze valve seats and guides, a competition valve job, unshrouded combustion chamber, blended bowls, and shortened valve guides for high-lift cams. The port shape is stock for seamless compatibility. Valves, springs, and lifters are not included. This cylinder head does not have an emissions port.

Fitment

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Specifications

BrandCylinder Works
Part NumberC0BU CH1003-K01

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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