Hydraulic fluid LS: hydraulic fluid for filling the clutch lever on LS Hydraulic Fluid: Hydraulic fluid for filling clutch handle K4x model redesign. Replaces ARAL Vitamol V10 part no.: 0 392 546 assembly on K4x model update. Replaces ARAL Vitamol V10 TN: 0 392 546 ***** ***** *****