Locate the horn in your motorcycle or bike. Hold the nut with the spanner and rotate the screw in anti-clock wise direction slowly and then check the horn by pressing horn switch.
If there is no proper sound which you looking for, then slowly rotate the screw in clock wise direction and see the sound of horn. Once the sound is adjusted, tighten the nut by rotating in clockwise direction.
If in case of any difficulty with horn or for any bike serviec, please contact your nearest certified Doers mechanics for doorstep service.