HIROBO HI2504029 LEPTON LEX Timing Belt 40S2M1166  [HI2504029]

Lepton Lex Timing Belt for RC Helicopters

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

Installation notes: inspect pulley teeth and alignment before fitting, route the belt over the corresponding pulleys without twisting, and set tension so the belt has firm engagement without excessive preload. Avoid over-tightening which increases bearing load and wear.

Tuning role: belt condition and tension affect cyclic and tail response on small helicopters, so use this belt to restore proper mesh and reduce slop between motor pinion and spur gear. Regular visual checks for fraying, glazing, or stretched teeth help decide when replacement is needed.