LOSI Promoto-MX Hub and Front Sprocket Set 35T/11T MX3511S by GPM  [MX3511S]

TEAM LOSI DIRT BIKE PROMO-MX MOTORCYCLE Medium Carbon Steel Hub Chain Sprocket set (35T/11T) - GPM MX3511S
Price:
CAD$43.18
Brand:
GPM
Model:
MX3511S
GTIN:
4894538384970
Condition:
Brand New
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alt="TEAM LOSI DIRT BIKE PROMO-MX MOTORCYCLE Medium Carbon Steel Hub Chain Sprocket set (35T/11T) - GPM MX3511S" title="TEAM LOSI DIRT BIKE PROMO-MX MOTORCYCLE Medium Carbon Steel Hub Chain Sprocket set (35T/11T) - GPM MX3511S"
alt="TEAM LOSI DIRT BIKE PROMO-MX MOTORCYCLE Medium Carbon Steel Hub Chain Sprocket set (35T/11T) - GPM MX3511S" title="TEAM LOSI DIRT BIKE PROMO-MX MOTORCYCLE Medium Carbon Steel Hub Chain Sprocket set (35T/11T) - GPM MX3511S"
alt="TEAM LOSI DIRT BIKE PROMO-MX MOTORCYCLE Medium Carbon Steel Hub Chain Sprocket set (35T/11T) - GPM MX3511S" title="TEAM LOSI DIRT BIKE PROMO-MX MOTORCYCLE Medium Carbon Steel Hub Chain Sprocket set (35T/11T) - GPM MX3511S"
alt="TEAM LOSI DIRT BIKE PROMO-MX MOTORCYCLE Medium Carbon Steel Hub Chain Sprocket set (35T/11T) - GPM MX3511S" title="TEAM LOSI DIRT BIKE PROMO-MX MOTORCYCLE Medium Carbon Steel Hub Chain Sprocket set (35T/11T) - GPM MX3511S"

Medium carbon sprocket upgrade

The MX3511S sprocket set is an RC-scale replacement for the LOSI Promoto-MX 1/4 motorcycle RTR platform. The rear hub sprocket and front pinion are made from medium carbon steel to give better wear resistance than typical stamped parts while keeping a direct fit to stock drivetrain components.

Built for direct swap compatibility, the kit prioritises longevity and steady drivetrain behaviour rather than changing final gear ratios. The supplied screw pin follows the original mounting method for a straightforward, plug-and-play installation on compatible Promoto-MX RTRs.

Installation notes: remove the stock rear hub sprocket and front pinion, transfer any spacers or washers as needed, fit the 35T rear hub sprocket and 11T front sprocket, then secure the screw pin to factory torque values. Verify chain alignment and perform a short run-in before full-power use.

Packing includes

  • Hub Chain Sprocket 35T - 1pcs
  • Front Chain Sprocket 11T - 1pcs
  • Screw Pin M4x2.5x14 - 1pcs

Original Name / Part No:

LOS262003+LOS262004

Compatible Models

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

Fit this set when the originals show wear or when you need longer service life for practice runs; always recheck chain tension and alignment after installation to protect bearings and the chain.

Are these sprockets a direct replacement for my Promoto-MX?

Yes, the MX3511S set is made to match the stock mounting style on the listed Promoto-MX RTR models for a direct swap.

Will these change my gearing or top speed?

No, the set keeps the same 35T rear and 11T front tooth counts, so the overall gear ratio remains unchanged unless you fit different tooth counts.

What maintenance should I do after fitting?

After installation check chain alignment, set the correct tension, and run the bike gently for a few minutes before pushing full throttle to confirm smooth operation.

Do I need special tools for installation?

No special tools are required beyond standard hand tools to remove the old sprockets and fasten the screw pin; stick to recommended torque values.

How do I know when to replace my stock sprockets?

Replace the sprockets if you see hooked teeth, uneven wear, or frequent chain slipping; medium carbon steel parts will extend service life under normal use.

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