Losi Promoto-MX Swingarm Chain Adjuster Upgrade JR-LMX08-DB by JAZRIDER  [JR-LMX08-DB]

Upgrade chain adjusters for Promoto-MX

This RC-scale chain tension adjuster set for the Team Losi Promoto-MX Motorcycle platform is manufactured by JAZRIDER from machined aluminum and finished in blue. It replaces the original plastic adjusters to offer a firmer, more predictable adjustment point for chain tension and axle seating on dirt bike chassis.

Functionally the adjusters let builders fine-tune chain slack and help maintain driveline alignment after suspension or drivetrain changes. They mount at the swingarm axle area and are compatible with the bike's existing axle hardware, providing small, controlled movements so chain tension can be set evenly across both swingarm sides.

Fitment notes: install the adjusters at the axle area, ensure the axle sits squarely in the slot, and make conservative incremental turns until the target chain tension is reached before tightening the axle hardware. Re-check chain tracking and wheel freedom once secured. These components are intended for RC dirt bike applications and for users comfortable with basic chassis setup work.