What mechanical adjustments should be made to a motorcycle before carrying a heavy passenger or luggage?

1. Decrease tyre pressures to 10 psi and loosen the drive chain
2. Increase rear suspension spring preload, adjust tyre pressures to the manufacturer's two-up/loaded specification, and re-aim headlight if necessary
3. Remove the front brake caliper to save weight
4. Tighten the throttle cable until the engine idles at 4,000 RPM