Description
The Cylinder Works 3mm Big Bore Kit for Yamaha WR250F (2015-2019) increases displacement to 269cc and features a durable nickel silicon carbide-plated cylinder sleeve for extended lifespan. Designed as a direct bolt-on replacement, it requires no machining for installation. The kit includes a cylinder, matched Vertex piston kit (piston, rings, pin, and clips), and necessary gaskets. It is honed to exact specifications for easy piston installation and delivers OEM-like appearance while improving performance and reducing engine noise. Replacement piston, gasket, and ring sets are available separately.
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