Motor Pinion 14T for EMBLA EB - HI0304169 by Hirobo  [HI0304169]

Pinion summary for EMBLA EB

This is a direct-replacement 14T motor pinion for EMBLA EB series helicopters. The HI0304169 is designed to mate with the spur gear and provide accurate engagement for reliable drivetrain operation on EMBLA EB models.

Use the pinion to replace a worn gear or to experiment with different gear ratios. Because it sits on the motor shaft, changes will affect backlash and the overall drivetrain response.

Installation guidance: free the motor from its mount when necessary to access the shaft, confirm the shaft diameter and set screw location, then slide the pinion into the correct axial position for proper mesh. Run a slow test rotation to confirm contact and re-torque the set screw after a brief run-in.

Tuning notes: fitting the 14T pinion adjusts the gear ratio, which can influence head speed and tail/rotor input balance. Ensure there is adequate clearance in the gearbox and that bearings and the spur gear show no signs of wear.