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

Outer diff shaft replacement for Mini-Z MR-015

This rebuild component fits the Kyosho Mini-Z MR-015 platform and supplies the outer tuned ball differential shaft named in the product title. It is an RC-scale replacement part built to seat into Mini-Z MR-015 differential assemblies and to restore or refine outer differential behaviour during routine maintenance.

The shaft operates inside the ball-type differential to change how torque is distributed between the drive outputs. In tuning terms it affects traction transitions and the balance of slip between left and right outputs, so hobbyists usually evaluate diff feel after reassembly and make small internal adjustments as needed.

Installation calls for partial disassembly of the MR-015 differential housing to access the outer shaft and associated ball elements, careful cleaning of mating faces, and reassembly to proper tolerances. Using correct Mini-Z replacement internals preserves expected clearances and drivetrain smoothness.