On my stock Special petcock I once went about 20 mi. on reserve. And the current prob with my bike is definitely not plogged carbs Don't know how much farther I could have gone, but you can figure it out from the factory manual. On long distance rides I gas up every 100 mi. Nice round number easy to remember and easy to make. Strap on a can if it's like 500 mi. to the next gas station.
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