Lepton Lex Compatible 56T Pulley - HI0304024 Hirobo  [HI0304024]

Main Drive Pulley - Lepton Lex 56 Tooth

This Hirobo HI0304024 main pulley is intended for use with Lepton Lex airframes and is manufactured with a 56T tooth count, as the part number denotes. As part of the main drivetrain in scale RC helicopters, this pulley engages the primary drive gear and impacts final drive ratio, mesh quality, and how torque transmits through the system.

Installation notes: Inspect the mating spur and pinion for signs of wear prior to installation, confirm axial alignment and correct mesh to prevent early failure, and secure the pulley following the airframe maker's recommended fastening method. Also check surrounding bearings and shaft endplay for issues that could disturb gear engagement. Expect to fine-tune mesh and backlash after initial test runs.

Tuning role: Swapping pulley tooth counts alters the overall gear ratio and rotor RPM at a set motor speed; the 56T option is one way to tailor rotor characteristics to motor and ESC settings. When you change pulley sizes, reassess tail rotor drive and collective behaviour to maintain balanced handling.

Maintenance: Monitor tooth profiles for chipping or distortion, keep the gear interface clear of debris, and replace the pulley if wear degrades mesh stability. Regular checks before flight and after intensive sessions preserve consistent drivetrain performance.