KM153 Alloy Middle Gear Technical Upgrade by GPM  [KM153]

Technical notes for KM153 middle gear

The KM153 middle gear is supplied as 1 pcs and engineered as an aftermarket gearbox component compatible with Kyosho motorcycle layouts. It occupies the driveline between motor pinion and spur gear to transmit torque while improving wear characteristics over the original material.

Fitment procedure: ensure correct axial alignment and gear mesh using the original shaft and retaining hardware, verify bearing clearances, and confirm there is no interference with adjacent components. Use fine adjustment by hand rotation to seat the gear without inducing side loads.

Service and tuning guidance: apply a light, purpose-fit gear grease to mating surfaces, monitor bearing fit for endplay, and check that motor timing and ESC settings remain stable after installation. Avoid excessive clamp torque on fixings to prevent concentrated stress on the alloy gear or gearbox housing.