MR-03/MR-04 Mini-Z Ball Differential Pressure Plate - Kyosho MZW705-3  [KY-MZW705-3]

Compact pressure plate for Mini-Z ball diffs

This Kyosho MZW705-3 pressure plate is an RC-scale replacement part made for Mini-Z ball differentials used in MR-03 and MR-04 platforms. It acts as the contact cap that transmits preload and retains the ball bearings in the diff stack, so fitting the correct pressure plate preserves the intended engagement and service life of the differential assembly.

Compatibility is limited to MR-03 and MR-04 ball-type differentials, so verify your Mini-Z chassis uses a ball diff before installing. The component is commonly swapped when worn surfaces appear or when experimenting with diff preload to change vehicle behavior during setup sessions.

Installation is a straightforward process for experienced Mini-Z users: open the diff housing, remove the ball stack, seat the pressure plate correctly, then reassemble while checking preload and clearance. Refer to the factory service steps or a trusted teardown guide for torque and reassembly order to avoid misalignment.

Tuning notes: subtle differences in the pressure plate seating or surface finish influence how the ball diff transmits torque and recenters, which can affect corner exit traction and steering feel. Make small adjustments and test on a consistent surface to judge changes accurately.

Maintenance advice: during diff servicing inspect the plate for scoring or deformation, clean mating faces, and replace if wear is evident. Use lubricants recommended for ball differentials and apply sparingly to keep preload consistent.