Mech has a nice list. I would add a small roll of bailing/mechanic wire and tie wire. works great for holding parts or items in place. Drove a atv 15 miles (slow mind you) with mechanics wire holding tie rod socket together. Zip ties worked but broke now and then. Have also used many times because something came loose.
I forgot, add 2 or 3 of the most popular wrench sizes for your machine. Usually 8mm, 10mm, 12mm