Longest I have gone in one sittin is Canandaigua, NY to Fayetteville, NC, mostly on slab, including a nice trek around the Capital Beltway in a driving rain storm. The next morning finished up by going Fayetteville to Daytona Beach, FL. Not a bad two day jaunt. Anyway, as others here have said, the bike will go farther than you, so do what is comfortable.
Go Your Own Way!!!!!
