LOSI Promoto-MX Motorcycle Aluminum Chain Tension Adjuster by JAZRIDER JR-LMX08-DB  [JR-LMX08-DB]

Aluminum chain tension adjuster for Promoto-MX

This is an RC-scale chain tension adjuster set produced for the Team Losi Promoto-MX Motorcycle platform by JAZRIDER. Machined from aluminum and finished in blue, the parts are intended to replace factory plastic adjusters on Promoto-MX dirt bike chassis and provide a stable, repeatable adjustment point for chain tension and axle alignment during tuning and maintenance.

Functionally the adjuster set serves to fine-tune chain slack and keep the driveline aligned after suspension or drivetrain changes. It mounts at the swingarm axle area and works with the bike's existing axle hardware, offering incremental movement to set chain tension consistently across both sides of the swingarm.

Installation notes: fit the adjusters to the axle area, ensure the axle seats squarely in the adjuster slot, and use progressive adjustments to reach the desired chain tension before securing the axle hardware. Check chain alignment and free movement of the rear wheel after final tightening. These parts are intended for RC dirt bike use and for users comfortable with routine chassis tuning.