MUGEN MRX-5 2nd Gear 21T Upgrade - Arrowmax AM-MRX5-H0762  [AM-MRX5-H0762]

Arrowmax AM-MRX5-H0762 2nd. Gear 21T (7075 HARD)
Price:
AUD$8.48
Brand:
Arrowmax
Model:
AM-MRX5-H0762
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21T Second Gear for MRX-5 Transmission

The Arrowmax AM-MRX5-H0762 2nd. Gear 21T offers a 7075-T6 aluminium construction with a hard coating and is intended for the MUGEN MRX-5 second gear location to improve wear life while matching standard RC drivetrain loads.

Choosing this 21-tooth option from the same series simplifies gear ratio trials to balance sprint acceleration and top end on different tracks. It is shaped to mesh with the MRX-5 spur and will fit where geometry and shaft dimensions correspond to the original part.

Installation reminder: replacing the MRX-5 second gear requires routine gearbox service. Set mesh and endplay accurately during reassembly and inspect bearings and the spur gear when changing gearing to ensure a reliable setup.

Vehicle Fitment

  • MUGEN MRX-5

Will this fit MRX-5 kits with optional gearcases?

In most kit-spec MRX-5 gearcases the Arrowmax AM-MRX5-H0762 will fit, but if you have an aftermarket case verify the second gear bore and thickness before installation.

Does the hard coat change tooth geometry?

The hard coat is a surface treatment and does not alter the machined tooth profile; always recheck mesh to account for manufacturing tolerances.

Can I run this gear with stock bearings?

Yes, stock bearings are typically fine, but inspect for wear and replace if play is evident to maintain correct endplay and quiet operation.

Any break-in required?

Run the gearbox at low load for a short break-in to confirm smooth engagement and check for unusual noise before full-power use.

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