Timing Belt 40S2M1166 for Lepton Lex (HIROBO HI2504029)  [HI2504029]

Lepton Lex Belt — Replacement Guide

This timing belt is supplied as a replacement part for Lepton Lex helicopters and is identified by the HIROBO HI2504029 reference. It preserves correct tooth engagement across pulleys to maintain rotor timing and consistent drive operation.

Installation notes: examine pulleys and bearings for wear before installation, fit the belt without twists, and set tension to remove play while not overstressing bearing surfaces. Excessive tension can accelerate component wear and reduce efficiency.

Tuning role: belt condition and tension influence cyclic precision and tail stability on compact helicopters. Installing the proper 40S2M1166 belt helps eliminate slop and recover predictable handling. Check regularly for glazing, fraying, or tooth deformation as indicators for replacement.