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2Bros MCS LTD Company number 16176735 - Vat No. GB 508324506 - info@2bros-mx.com - Tel: 03301333748
The +3mm Big Bore Cylinder Kit (Part Number: 21002-K01) is a high-performance upgrade designed for Yamaha WR250F and YZ250F models from 2001 to 2013. This kit increases engine displacement to 269cc with a 12.5:1 compression ratio, delivering improved power and performance without requiring any additional machine work. It is a direct bolt-on solution, featuring a Nickel Silicon Carbide plated bore for durability and precise honing for easy piston installation.
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