This aluminum chain tension adjuster is an RC-scale replacement designed for Team Losi Promoto-MX motorcycles and referenced as model JR-LMX08-GR. It creates a corrosion-resistant mounting point for final chain tension adjustments and lateral alignment on Promoto-MX style dirt bikes.
Constructed from aluminum with a green anodized finish, the component replaces stock plastic or alloy pieces while using the Promoto-MX rear end's original mounting locations. The part aims to preserve factory geometry while offering firmer incremental chain settings that help keep play consistent across typical 1/10 scale riding demands.
Fitment uses the factory fastener pattern: remove the existing adjuster at the rear wheel, align the JR-LMX08-GR with the chassis mounting points, then tighten to the recommended torque. Always verify chain tension through its full travel to confirm alignment prior to operation.
As an upgrade, the adjuster serves as a precise stop for small chain length and alignment changes, useful when checking wheel tracking or when swapping between chain styles. The aluminum body resists deformation, aiding repeatable setups during maintenance and tuning.
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