Losi Promoto-MX Aluminum Chain Tension Adjuster, Precision Axle Alignment - JR-LMX08-DB by JAZRIDER  [JR-LMX08-DB]

Billet aluminum chain adjusters for Promoto-MX

This RC-scale chain tension adjuster set is made for the Team Losi Promoto-MX Motorcycle platform and produced by JAZRIDER. The parts are CNC-machined from aluminum with a blue finish to replace the stock plastic adjusters, providing a firmer, more repeatable adjustment point for chain tension and axle seating on dirt bike chassis.

The adjuster set lets you fine-tune chain slack and keep the driveline aligned after suspension or drivetrain changes. It installs at the swingarm axle area and works with the bike's existing axle hardware, allowing incremental movement so chain tension can be matched consistently on both sides of the swingarm.

Installation notes: fit the adjusters at the axle location, confirm the axle sits squarely in the adjuster slot, and make small progressive turns to reach the required chain tension before locking the axle hardware. Verify chain alignment and free wheel movement after final torque. These parts are intended for RC dirt bike use and for builders familiar with routine chassis tuning.