Promoto-MX Chain Tension Adjuster for Precision Tuning - JR-LMX08-BK by Jazrider  [JR-LMX08-BK]

Precision tuning adjuster for Promoto-MX chains

This component is an RC-scale chain tension adjuster set made to fit Team Losi Promoto-MX motorcycle frames and is listed as JR-LMX08-BK. CNC aluminum construction replaces softer stock parts to give a predictable axle seat and reduce movement that can upset chain alignment during spirited riding.

Installation uses the Promoto-MX's existing mounting points and standard fasteners. When fitting, align the axle carefully and torque hardware to the chassis manufacturer's specs, then re-check chain tension and side-to-side play before you run the bike. Note that this is a model-scale spare part, not for use on full-size motorcycles.

For tuning, adjust chain sag using this device and confirm alignment with the suspension compressed if you change ride height or spring rates. Regular checks after aggressive sessions will keep performance consistent and slow wear on the chain and sprockets.