Works'91 TeamSpec Center Pulley Stopper for YZ-W91TS/YZ-W91 - YZ-630W3 by Yokomo  [YZ-630W3]

Center Pulley Retainer

The YZ-630W3 is an aluminium stopper made to secure the center pulley on Works'91 TeamSpec setups, supplied by Yokomo as a dedicated replacement for affected center pulley assemblies. It is an RC accessory intended only for remote-controlled chassis use.

Compatibility is limited to the Works'91 TeamSpec platforms specified by the manufacturer, ensuring the part matches the center pulley mounting points on supported YZ series frames. Its role is to hold the pulley position under belt tension and during suspension travel, helping maintain belt alignment during track running.

Installation is straightforward for technicians familiar with belt-driven touring cars: remove the original stopper from the center pulley assembly, fit the YZ-630W3 in the same location, and verify pulley rotation and belt alignment before operating. While setting up, check for play and retighten fasteners to the chassis manufacturer's recommended torque values.

Tuning note: this stopper is primarily a maintenance and reliability item rather than a performance modifier; its main benefit is consistent pulley location which supports repeatable belt tension and drivetrain behavior.