Here is a link to my day by day recount of the trip:    • Scooter Cannon Ball Run  

I would not do the scooter cannonball run without having these things at a minimum.

Stuff for your scooter:
1. quart of oil carried on you at all times. (funnel too)
2. extra gas
3. 1 spare rear tire
4. belt, rollers, shoes

Stuff for your comfort:
5. wind screen
6. throttle lock
7. sunglasses or dark visor
8. sunblock if not totally covered or neck gaiter
9. rain gear / wind gear
10. motorcycle safety suit - full body.
11. water
12. ear plugs - soft wax self forming plugs
13. riding gloves
14. GPS or phone with offline maps