MRX4 6mm 7075 Main Shaft Precision Upgrade - MRX4-12/TI by 3Racing  [MRX4-12/TI]

Technical overview of the 6mm 7075 main shaft

This 6mm main shaft is intended as a precision aftermarket replacement or performance upgrade for Mugen Seiki MRX4 and MRX4-R touring chassis. It locates in the final drive train to transmit torque from the gearbox to the wheels while supporting spur and pinion loads under racing conditions.

Functionally the shaft preserves concentricity along the drivetrain centerline and resists normal wear and deflection. During installation confirm bearing seating, axial and radial alignment, and ensure gears run true with minimal play before full-power operation.

For setup and tuning the 7075 aluminium construction gives a high stiffness-to-weight ratio, providing a dimensional reference for accurate gear mesh adjustments and backlash checks. Routine inspection for surface defects at bearing seats and gear contact zones is recommended to maintain drivetrain efficiency.

Use this component where a precision, serviceable shaft is required for MRX4/MRX4-R drivetrains; revalidate bearing fit and gear mesh after installation and monitor the shaft as a scheduled wear item.