Phone
Credit Cards
CASH!!
Cash because depending are where you're going you may be out of coverage and there's no better way to flag down passersby in pickups than with a Jackson. The one time I did it, they wouldn't take it so I dropped on the floor. Some people get a towing service. There are a few for motorcycles but they are pretty limited in where they will go and how far they'll haul you. AAA, AMA and some others. It boils down to how much you've gotta be back on time. The only things that have stranded me, always in the middle of nowhere, have been electrical and since the things you'd need to cobble together a limp home system are small, they would be on my list. A pair of jumpers with alligators on the ends so you can bypass everything to power up your ignition. Fix he Boyer pickup leads on the stator in the comfort of your garage beforehand. The wires break under the ziptie from being shook by the iso mounted engine. You can't see it and it's intermittent. Avoid resistor caps like the plague. Carry extra plugs and that would be about it. I've known people that carry an extra Boyer ignition box and a spare coil, but whatever toasted your coil would probably do it again and the Boyers are pretty reliable after they've burned in.
Oh yeah, and run the ignition off a relay. The harness, switches and buttons then only have to carry next to no current to power the ignition, which they do admirably, most of the time.