Namura CX-10000 Cylinder Only, 3.07 in Bore for Honda CRF250R and CRF250X

When it comes to upgrading your engine, choosing the right components is essential for achieving optimal performance. Namura’s cylinders are designed to meet the needs of both casual riders and performance enthusiasts alike. By offering a variety of sizes, Namura ensures that you can find the perfect fit for your engine rebuild or enhancement project. The advantage of choosing Namura goes beyond just their selection of cylinders. 

Upgrade or rebuild your engine with the Namura CX-10000 cylinder, designed for reliable fitment and performance on select Honda CRF250R and CRF250X models. This cylinder features a 3.07-inch bore and is manufactured to meet original equipment specifications, making it a practical replacement for worn or damaged engine components. The cylinder-only design is intended for applications where the existing piston and related components are being replaced or reused as part of a complete engine service.

Manufactured by Namura and supplied under vendor part number CX-10000, this cylinder is cast from AB4C aluminum and finished with a nickel-silicon-carbide plated bore. This construction supports effective heat transfer, durability, and wear resistance under demanding riding conditions. Most applications are designed as a straightforward drop-in installation without requiring engine case modifications, although professional inspection and installation are recommended to confirm compatibility with the complete engine assembly.

The Namura CX-10000 fits select 2004–2009 Honda CRF250R models and 2004, 2010, 2011, and 2014 Honda CRF250X models. Verify the model year, engine configuration, bore specification, and required supporting components before ordering. This product is manufactured by Namura, branded NAMURA, and identified by manufacturer and vendor part number CX-10000; catalog SKU 190-10000 is excluded from the product identification.

Features:

• Brand: NAMURA
• Manufacturer: Namura
• Manufacturer and vendor part number: CX-10000
• Bore size: 3.07 inches
• Cylinder type: Cylinder only
• Construction: Cast AB4C aluminum
• Bore finish: Nickel-silicon-carbide plated
• Fitment: 2004–2009 Honda CRF250R
• Fitment: 2004, 2010, 2011, and 2014 Honda CRF250X
• Installation: Designed for most applications as a drop-in replacement without case modifications

Fitment:
2004 Honda CRF250R
2004 Honda CRF250X
2005 Honda CRF250R
2005 Honda CRF250X
2006 Honda CRF250R
2006 Honda CRF250X
2007 Honda CRF250R
2007 Honda CRF250X
2008 Honda CRF250R
2008 Honda CRF250X
2009 Honda CRF250R
2009 Honda CRF250X
2010 Honda CRF250X
2011 Honda CRF250X
2012 Honda CRF250X
2013 Honda CRF250X
2014 Honda CRF250X
2015 Honda CRF250X
2016 Honda CRF250X
2017 Honda CRF250X