Kyosho MR-03/04 MM/RM/HM RC Ball Differential - MZW705

The Kyosho MZW705 is a ball differential unit designed for Kyosho Mini-Z MR-03 and MR-04 chassis in MM, RM, and HM motor mount configurations. A ball differential distributes drive torque between the rear wheels more smoothly than a standard gear diff, giving more consistent traction when cornering and under acceleration. This is a genuine Kyosho part, so it fits directly into compatible MR-03 and MR-04 chassis without modification. Whether you're replacing a worn diff or stepping up from a stock unit, the MZW705 is a widely used upgrade among Mini-Z racers looking for more precise rear-end behaviour on the track.

Key Features

• Designed specifically for Kyosho MR-03 and MR-04 chassis in MM, RM, and HM motor mount configurations
• Ball differential design allows smoother torque distribution compared to a standard gear differential
• Genuine Kyosho replacement part, ensuring direct fitment with no adaptation required
• Suitable for both club racing and competitive Mini-Z events where rear traction consistency matters
• Style code MZW705 (also listed as KYOMZW705) for confident part identification when ordering

What's Included

• Kyosho MZW705 ball differential unit

What You Need

• Kyosho MR-03 or MR-04 chassis with MM, RM, or HM motor mount configuration
• Appropriate Mini-Z tools for differential installation (jewellers screwdrivers, ball diff adjustment tools)
• Diff grease or oil if not already held in your workshop supplies