The M4WD-11/LB light blue stopper is a small replacement part designed to limit roller travel where rollers meet track fixtures. Its bright colour helps with fast visual checks of front and rear roller mounts during maintenance.
Supplied as a spare rather than a tuning accessory, the stopper is suited to hobbyists and collectors who keep spares on hand. No adjustments to motor, gears, or chassis are required to fit this component.
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