The TW isn't much different than any other old school motorcycle. All sorts of "what I carry" lists about. Much depends on skill level
and experience. The stock tool kit isn't too poor. Maybe ad a master link , safety wire, patch kit, pump, prop stick. Sometimes the best bit of kit anymore is your cell phone and pre ride maintainence. A well maintained and sensibly ridden TW in all probability won't leave you stuck with something field repairable. The key is keeping up with maintainence.