Lepton Lex Timing Belt 40S2M1166 - HIROBO HI2504029  [HI2504029]

Precision Lepton Lex Timing Belt

This replacement timing belt is an RC-scale accessory intended for the Lepton Lex line as identified by the HIROBO HI2504029 code. It performs the drivetrain role of maintaining correct tooth engagement between pulleys to preserve rotor timing and drive consistency.

Installation notes: check pulley teeth and axial alignment before fitting, route the belt over the correct pulleys without twisting, and tension so the belt engages firmly with no excessive preload. Avoid over-tightening since that increases bearing load and accelerates wear.

Tuning role: belt condition and correct tension directly influence cyclic and tail feel on small helicopters, so refitting a proper belt restores mesh precision and reduces play between motor pinion and spur gear. Inspect for fraying, glazing, or stretched teeth to determine replacement needs.