LOSI PROMO-MX Transmission Gear Set MX1200S Medium Carbon Steel Service Upgrade by GPM  [MX1200S]

TEAM LOSI DIRT BIKE PROMO-MX MOTORCYCLE Medium Carbon Steel Transmission Gear set - GPM MX1200S
Price:
USD$29.90
Brand:
GPM
Model:
MX1200S
GTIN:
4894538376753
Condition:
Brand New
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Technical overview

This MX1200S transmission gear set is supplied as an RC-scale replacement for LOSI PROMO-MX motorcycle gearboxes, provided as a pair to address worn teeth and restore accurate engagement under load.

Install when gear wear or degraded engagement affects drivetrain performance. Access the gearbox, withdraw the worn gears and fit the replacement pair, verifying shaft alignment, mesh and clearance with the spur and motor pinion to avoid binding and uneven wear.

The medium carbon steel construction is selected for consistent engagement characteristics and predictable service life in typical RC operating conditions, making the set suitable for hobbyists and competitors performing routine drivetrain servicing.

Packing includes

  • Transmission gear set - 2pcs

Original Name / Part No:

LOS262007

Compatible Models

  • LOSI-1/4 PROMOTO-MX MOTORCYCLE RTR, FXR-LOS06000
  • LOSI-1/4 PROMOTO-MX MOTORCYCLE RTR PRO CIRCUIT-LOS06002

Use the MX1200S set as a direct replacement on the listed PROMO-MX models and confirm even tooth contact and free rotation during installation to ensure reliable operation.

What parts are supplied with the MX1200S?

Two transmission gears are supplied, as listed under Packing includes, to replace the original gearbox pair.

How should I verify compatibility before fitting?

Cross-check the vehicle against the Compatible Models box, inspect shaft diameters and existing pinion condition, and confirm the listed part number before installation.

Any recommended installation checks?

Verify shaft alignment, use the correct shims to set backlash, and rotate the transmission by hand to ensure even tooth contact across the mesh.

What maintenance helps extend gear life?

Maintain correct mesh, keep the gearbox free from grit, inspect teeth frequently for damage and replace the set when signs of uneven wear appear.