Kyosho Mini-Z MR-015 Outer Tuned Ball Differential Shaft by 3Racing KZ-07B  [KZ-07B]

Replacement outer diff shaft for Mini-Z MR-015

This rebuild kit is intended for the Kyosho Mini-Z MR-015 platform and provides the outer tuned ball differential shaft component named in the product title. It is an RC-scale replacement part designed to fit Mini-Z MR-015 differential assemblies and to restore or adjust outer differential action during maintenance.

The part functions within the ball-type differential assembly to influence how the diff transfers torque between the wheels. In practical tuning it affects traction transitions and the balance of slip between left and right outputs, so installers typically evaluate differential feel after reassembly and adjust other diff internal settings as needed.

Installation requires partial disassembly of the MR-015 differential housing to access the outer shaft and associated ball elements, careful cleaning of mating surfaces, and reassembly to the manufacturer’s tolerances. Use of correct replacement components for Mini-Z internals helps maintain expected clearances and drivetrain smoothness.