Lepton Lex 40S2M1166 Timing Belt Upgrade for RC Helicopters - HIROBO HI2504029  [HI2504029]

Timing Belt for Lepton Lex Helicopters

This is a replacement timing belt matched to the Lepton Lex series and identified by HIROBO HI2504029. It keeps pulleys correctly engaged to ensure predictable rotor timing and smooth power transfer.

Installation notes: before fitting, verify pulley condition and alignment, lay the belt onto the pulleys without twists, and tension to eliminate slack while avoiding excessive preload. Excessive tightness increases bearing load and reduces component life.

Tuning role: belt wear or incorrect tension can alter cyclic feel and tail response; replacing with the correct 40S2M1166 belt helps return handling to expected levels and reduces drivetrain play. Regular inspection for wear and tooth condition will guide replacement intervals.