Lazer ZX7.5 Spur Gear 48P 78T - Kyosho LA427-78  [KY-LA427-78]

Spur Gear Summary

The Kyosho LA427-78 spur gear is a 48 pitch, 78-tooth replacement intended for Lazer ZX7.5 models. It acts as the main large gear in the on-road geartrain and is supplied as an aftermarket spare suitable for hobby use.

The component is purely mechanical within the drivetrain and will alter final gear ratio and torque delivery when used with a chosen pinion. Fitment relies on the ZX7.5 spur shaft and existing hardware, so confirm mount spacing and shaft dimensions prior to assembly.

Installation advice: set a small, consistent backlash at the pinion interface, ensure the gear runs concentric with no axial play, and apply a light gear grease if needed for your maintenance routine. After fitting, rotate the drivetrain by hand to verify smooth engagement before running the model.

This spare suits tuners and hobbyists who need to replace or change gear ratios on Lazer ZX7.5 based RC cars, providing a straightforward swap to influence acceleration and top-end characteristics.