1/32 Mini 4WD Mass-Damper Replacement Ball M4WD-04/RE by 3Racing  [M4WD-04/RE]

M4WD-04/RE 6mm damper ball for mass-damper cartridges

This red 6mm steel ball is supplied as a replacement for mass-damper cartridges on 1/32 Mini 4WD vehicles. It is intended as a service item for housings that accept plain 6mm balls rather than as a performance upgrade.

When replacing balls, check the bore and retainer for signs of wear or burrs that could cause play or binding. The colour is ornamental; prioritise roundness and surface finish when assessing suitability for longer running. Compatibility varies by damper design, so verify the original dimensions before fitting.

For experienced tuners: after installation, confirm the damper cycles smoothly and that the ball is firmly retained. If the assembly uses specialised damping elements, verify clearance and retention method first.