Mugen MRX5 First Gear 15T CNC 7075 Aluminium Upgrade - Arrowmax AM-MRX5-A0001  [AM-MRX5-A0001]

Arrowmax AM-MRX5-A0001 1st. Gear 15T (7075 HARD)
Price:
NZD$10.20
Brand:
Arrowmax
Model:
AM-MRX5-A0001
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Arrowmax 7075 1st gear for MRX5 performance

This part is a 1st gear made for Mugen MRX5 models and carries the Arrowmax part number AM-MRX5-A0001. Manufactured from 7075 aluminium with a hard surface treatment, it is intended as a direct swap for the gearbox first stage after wear or damage.

Install it when you notice looseness or rounded tooth profiles in the drivetrain; fitting a new 1st gear restores precise tooth contact and helps preserve smooth power delivery through the gearbox. The gear is a single-piece component designed to work with the MRX5 transmission and the common spur and pinion arrangements used on that chassis.

On assembly, check gear mesh and backlash with the motor pinion and spur, confirm bearings are correctly located, and verify free rotation prior to closing the gearbox. Avoid over-clamping grub screws to prevent seat distortion. A light smear of gear lubricant on the face will help during the break-in period.

Is this a direct replacement for MRX5?

Yes, Arrowmax AM-MRX5-A0001 is produced to replace the MRX5 first-stage gear directly, though you should confirm your gearbox version and clearances before fitting.

What lubricant should I use on a 7075 aluminium gear?

A light synthetic gear grease or low-viscosity gear oil on the face is suitable; avoid heavy pastes that can trap debris and accelerate wear.

How do I check mesh for best life?

Set a small, even backlash using a strip of paper or feeler method, verify the pinion sits square to the spur, and run slowly while watching for binding or uneven contact.

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