MUGEN MRX-5 Second Gear 21T - Arrowmax AM-MRX5-H0762  [AM-MRX5-H0762]

Arrowmax AM-MRX5-H0762 2nd. Gear 21T (7075 HARD)
Price:
CAD$8.41
Brand:
Arrowmax
Model:
AM-MRX5-H0762
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Second Gear 21T Replacement for MRX-5

This Arrowmax AM-MRX5-H0762 2nd. Gear 21T is a direct replacement for the MUGEN MRX-5 second gear, machined from 7075-T6 aluminium with a hard coating that improves wear resistance versus untreated pinions while remaining suitable for normal RC drivetrain loads.

Offered as part of a tooth-count range, this 21-tooth option makes it simple to alter overall gear ratios when dialling acceleration or top speed during tuning. It is engineered to mesh cleanly with the MRX-5 spur gear and fits where shaft diameter and gear form match the MRX-5 specification.

Installation notes: replacement requires standard gearbox disassembly and reassembly following the chassis service routine; set mesh and endplay carefully and inspect bearings and spur gear condition when changing gearing to ensure dependable operation.

Fitment

  • MUGEN MRX-5

Will this pinion work with earlier MRX-5 gearbox shells?

Measure the shaft diameter and gear face width on the original MRX-5 unit; the Arrowmax AM-MRX5-H0762 is designed to match standard MRX-5 geometry but verifying dimensions avoids fit issues.

Do I need to change mesh settings because of the hard coat?

The hard coating keeps the tooth profile intact, but you should recheck and set mesh and endplay during installation to ensure proper engagement with the spur.

Any maintenance tips after fitting?

Inspect bearings and spur gear for wear when you change gearing, and run the gearbox briefly at low load to confirm noise and smooth operation before full use.

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