What is the correct procedure for checking and adjusting the free play of a motorcycle's mechanical front brake cable?

1. Measure the distance the lever moves before the brake begins to engage, and adjust the play using the adjusting nut at the brake hub panel.
2. Tighten the adjusting nut until the wheel cannot rotate freely, then back it off exactly one half turn.
3. Measure the play at the handlebar grip, and adjust it by adding spacer washers inside the brake lever pivot bolt.
4. Adjust the play by changing the thickness of the brake shoes inside the drum brake assembly.