Eliminate belt slip and improve throttle response with the Naraku CNC Machined Performance Variator Drive Face. Engineered specifically for the 50cc QMB139 (GY6) engine platform, this red anodized aluminum drive face is precision-machined to ensure a perfectly flat contact surface, maximizing belt grip and efficiency throughout the entire RPM range. A direct upgrade over the stock cast face, which develops grooves over time that kill top speed and gear ratio transitions.
Fits the 139QMB / QMB139 engine family found in most 50cc 4-stroke Chinese scooters:
Mechanic's Note: The drive face is the outer half of your CVT pulley system. Over time, the stock face develops grooves from the belt that kill top speed � replacing it with this Naraku unit restores original gear ratio transitions. Note: Does NOT include the kick start gear or cooling fan � swap those over from your old unit during installation.
California Prop 65 Warning: www.p65warnings.ca.gov
