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

Spur gear overview

This Kyosho LA427-78 spur gear is an RC-scale replacement part specified with a 48 pitch and 78 teeth, intended for use with the Lazer ZX7.5 series as identified in the product name. It serves as the primary large gear in the model's geartrain and is presented here strictly as a spare for hobby-grade on-road setups.

The component's role is purely mechanical within the model’s drivetrain, affecting final gear ratio and torque delivery when paired with a chosen pinion gear. Fitment uses the model’s standard spur shaft and associated hardware, so verify the ZX7.5 spur mount and spacing before final assembly.

Installation notes: check for correct tooth mesh by measuring backlash at the pinion interface, ensure concentric mounting with no axial play, and use a light, appropriate grease on gear faces if required by your maintenance routine. After installation, rotate the drivetrain by hand to confirm smooth engagement before running the model.

This spare is suitable for hobbyists and tuners who need to restore or change gear ratios on Lazer ZX7.5 based RC cars, offering a straightforward swap to adjust performance characteristics on track or practice runs.