Heavy Hitter 520 Primary Drive Conversion OEM/EBMX Ultra MotorsThis kit was designed for riders who want to maximize their bike's performance. As seen on EBMX FIM E Xplorer race team bikes ridden by Jack Field & Jess Gardiner. This is the lightest kit on the market, which means less rotational mass, and resistance. This kit consists of a hybrid sprocket setup, with the rear sprocket being a 7075 T6 Billet with anodized hard coating, and the front sprocket being a machined steel sprocket, heat treated, and counter
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Heavy Hitter 520 Primary Drive Conversion OEM/EBMX Ultra Motors