lo-o-o-o-ong rides
my '99 220 ran 82 miles on a day ride several weeks ago, with at least a reserve full of fuel left over. a lot of slow technical riding. lots of steady throttle running. tight woods, single track, and above-the-treeline (somewhere around 7K in elevation). stopped at about 80 miles when one of the crew ran out of gas and had to rig up a tow-strap. only then did i switch to reserve, and then only because we were already stopped and i didn't want to fumble in the dark for reserve while underway.
stock jetting (as far as i know), fmf gnarly rev pipe & turbine-core silencer.
by the way..., i only get 15 miles once i've switched to reserve.
so..., i figure that with a little judicious coasting on descents, and a steady moderate throttle hand, you might be able to squeeze almost 100 miles out of a stock tank.
when we're raging around with lots of steep little hillclimbs, racing each other, and considering some spilled fuel while ol' gouge is laying on his side; i'll still EASILY get over 70 miles on a stock tank.