Mugen MTX-4 16T Hardened First Gear - MTX4-0816 by 3Racing  [MTX4-0816]

Aluminium 16T First Gear for MTX-4

This hardened aluminium 16-tooth first gear is made to fit the Mugen MTX-4 gearbox as a direct replacement. It reinstates reliable gear engagement and helps reduce wear compared with ageing plastic parts while remaining intended for model car use on the MTX-4 platform.

Installation requires a gearbox service: remove the cover, swap in the 16T unit, check surrounding bearings and spur/pinion alignment, then set gear mesh and confirm free rotation before final assembly. Perform a quick mesh recheck after the first few runs to confirm correct seating and early wear patterns.

For setup and tuning, this metal first gear provides repeatable engagement behaviour that assists when adjusting mesh, preload, or diagnosing drivetrain noise. It is a straightforward component-level upgrade for builders and racers maintaining MTX-4 kits who want a durable metal option.