Mini-Z MR-03 MR-04 Pressure Plate Upgrade Kyosho MZW705-3  [KY-MZW705-3]

Mini-Z ball diff pressure cap replacement

This Kyosho MZW705-3 pressure plate is manufactured as a direct replacement for Mini-Z ball differentials on MR-03 and MR-04 chassis. It is the contact cap that conveys preload and keeps the ball bearings properly located in the differential stack, so a matching replacement preserves the diff's intended feel and durability.

Fitment is restricted to MR-03 and MR-04 ball diffs, so confirm the diff type in your chassis before fitting. Model owners replace the plate when wear appears or when exploring changes to differential preload and engagement during setup sessions.

Fitting is straightforward for those familiar with Mini-Z maintenance: remove the diff housing, extract the ball components, seat the pressure plate correctly, and reassemble while checking preload and clearances. Consult service manuals or established teardown guides for correct torque values and reassembly order to avoid damaging components.

Effect on handling: small differences in the plate's seating or face can modify how the ball diff transmits torque and returns to neutral, which impacts corner exit traction and steering precision. Make incremental setup changes and test consistently to judge the impact.

Service tip: inspect the plate during routine diff service for wear or scoring, clean mating faces carefully, and replace if distortion is detected. Choose lubricants that suit ball differentials and apply them lightly to preserve consistent preload behavior.