NCY Big Bore and Performance Cam Special '09-'15Big Bore Kit and Cam (Cam is currently on backorder from our vendor no eta on back in stock) NCY Yamaha Zuma125 59mm Cast Iron Cylinder w o head Give your Yamaha Zuma 125 some extra kick with this bolt on 158cc big bore kit. The A9 is most popular cam shaft used when doing upgrades for power take off. Beef up your power with this racing cam.
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