Description
The Cylinder Works +3mm Big Bore Cylinder Kit increases displacement to 269cc for the Honda CRF250R/X (2004-2009). Designed for easy installation, it requires no additional machining and closely resembles the stock cylinder. The kit includes a nickel silicon carbide-plated cylinder for durability, a Vertex piston, rings, pin, clips, and gaskets. With a 13.0:1 compression ratio, this kit enhances performance while maintaining reliability. Replacement pistons, gaskets, and ring sets are available separately.
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