Heavy Hitter 520 Primary Drive Conversion OEM/EBMX Ultra Motors LT Racing 2 each 1-3/4 oz

2 each 1-3/4 oz

Fits MX3 and MX4 bikes

and you’re ready to hit the road with full control over your stealth level at the flip of a switch

Our Blackline Wheelsets for Sur-Ron and E-Ride PRO bikes are built for the next-gen rider who wants performance

Heavy Hitter 520 Primary Drive Conversion OEM/EBMX Ultra Motors LT Racing 2 each 1-3/4 ozThe Heavy Hitter 520 Primary Drive Conversion is the lightest 520 chain drive kit on the market for the Sur Ron Ultra Bee, designed for riders who want maximum performance with minimum rotational mass. As seen on EBMX FIM E Xplorer race team bikes ridden by Jack Field and Jess Gardiner. Fitment: Sur Ron Ultra Bee OEM Motor Sur Ron Ultra Bee EBMX V1 and V2 XUB 80 Motor Download Tech Sheet (Assembly & Torque Specs) NOTE: For EBMX and OEM motors. Some