LOSI-1/4 Promoto-MX Hub Sprocket Medium Carbon MX036S by GPM  [MX036S]

Medium carbon steel hub sprocket for scale bikes

This hub chain sprocket is offered as a direct replacement for LOSI Promoto-MX scale motorcycles and is made from medium carbon alloy steel to boost wear life and flex strength over basic stamped parts. It is intended for routine maintenance and setup on dirt bike style RC models.

As a purely mechanical component it engages the drive chain and transmits torque toward the rear hub while helping to maintain correct chain line and slack. Inspect the chain and the rear hub when fitting a used sprocket to prevent early wear or mis-meshing.

Swap the sprocket by removing the rear wheel assembly and refitting the new unit with the original fasteners. After installation, confirm chain tension and lateral alignment before running the model to ensure reliable engagement.

Ideal when you need a straightforward, longer-lasting replacement for the listed LOSI Promoto-MX machines and want improved drivetrain durability for regular running and setup changes.