Mini-Z Ball Diff Pressure Plate for MR-03 and MR-04 Kyosho MZW705-3  [KY-MZW705-3]

Replacement pressure plate for Mini-Z ball differentials

The Kyosho MZW705-3 pressure plate is a precision replacement intended for Mini-Z ball differentials fitted in MR-03 and MR-04 models. It functions as the contact cap that transfers preload forces and secures the ball bearings within the diff stack, so using a purpose-made plate keeps the diff behaving as designed.

This part is specific to MR-03 and MR-04 ball-type diffs, so check your chassis configuration before ordering. Hobbyists typically replace the plate during routine diff servicing or while testing different preload setups to tune handling characteristics.

For installation, experienced Mini-Z technicians remove the differential housing, extract the ball stack, position the pressure plate correctly, and reassemble while verifying preload and clearance. Follow the official service sequence or trusted teardown notes to prevent misassembly or excessive tightening.

On track tuning: minor alterations to plate seating or surface contact can change how the ball differential transmits torque and recenters, which influences acceleration traction and steering balance. Conduct single-variable tests to isolate effects.

Care: inspect the plate each service interval for wear marks or distortion, clean mating surfaces thoroughly, and replace when wear appears. Select diff lubricants suited to ball differentials and use them sparingly to maintain predictable preload.