The MX3511S sprocket set is supplied as an RC-scale replacement for the LOSI Promoto-MX 1/4 motorcycle RTR models. The rear hub sprocket and front sprocket are made from medium carbon steel to increase wear resistance over common stamped alternatives, while maintaining a compatible fit with stock drivetrain parts.
Created for direct replacement, the set concentrates on durability and predictable drivetrain performance without altering gearing ratios. The included screw pin copies the factory mounting method so the swap is straightforward on listed RTR units.
Installation notes: remove the factory hub and front sprockets, transfer spacers or washers as necessary, fit the new 35T rear and 11T front sprockets, and fasten the screw pin to recommended torque. Confirm chain alignment and complete a short run-in before full-throttle use.
LOS262003+LOS262004
Ideal when original sprockets become worn or when you want a more robust drivetrain for frequent running; check tension and alignment after fitting to extend component life.
Copyright © 2008-2026 rcjaz.co.uk All rights reserved