Kyosho Mini-Z MR-02 / MR-015 Titanium Differential Shaft KZ-05 by 3Racing  [KZ-05]

This titanium differential shaft is a direct-replacement RC part for Kyosho Mini-Z platforms and is identified as model KZ-05. It is made to fit MR-02 variants (MM and RM) and MR-015 differential assemblies where compatible, supplying a lower-mass alternate to common steel or alloy shafts.

Drive role explained: the shaft serves as the rotating core inside the differential, helping to reduce inertia and maintain alignment of the differential gears. On small-scale track cars this can translate to crisper throttle feel and improved transient steering responses without changing gear ratios.

Installation overview: remove the gearbox cover and differential housing, transfer the differential internals and replace the OEM shaft with the titanium KZ-05. Confirm correct gear mesh and free rotation after reassembly. No chassis modification should be required when fitted to compatible MR-02 or MR-015 units.

Tuning advice: a lighter shaft is a subtle tuning item best used alongside tyres, gearing and suspension adjustments. Expect finer transient response for indoor circuits and club racing rather than large top speed gains.