Kyosho Mini-Z AWD Full Ball Bearing Upgrade AWD-21 by 3Racing  [AWD-21]

Mini-Z AWD bearing kit overview

This full ball bearing set is a purpose-built upgrade for Kyosho Mini-Z AWD platforms that reduces drivetrain friction and improves rotational smoothness in small-scale RC applications. The kit is identified as AWD-21 for easy reference.

Fit this set when you need cleaner bearing action in gear trains and wheel hubs on MR-03 AWD style Mini-Z AWD layouts. Installation normally replaces worn bushings or stock bearings; use a press or gentle hand seating to avoid damaging races. Periodic cleaning and light lubrication maintain smooth operation without over-applying oil.

From a tuning perspective, swapping to full ball bearings reduces mechanical drag and can sharpen throttle response while recovering small power losses at high RPMs, a clear advantage on short-track or indoor carpet where drivetrain efficiency matters.