Except for a couple long weekend trips to the mountains each year my airhead riding is 100 to 300 mile day rides.....so the stock tool roll, a bit of paper towel or a cloth rag, a spare spark plug, fuses, a tire valve cap that tightens schrader valves and a disc to set under the kickstand foot for soft soil is all that is under the seat. On a long trip I add a spare rotor and tool to remove it, tire irons, tube, spare diode board, some wax paper funnels and qt. of oil. Of course most of this stuff goes in a tail or tank bag.
Triumph Tiger 800