Living on an island has its obvious drawbacks when it comes to Motorcycle Touring but the best thing going on Maui is the ride up Haleakala (10,023ft). There are several places that rent bikes these days. Mostly Harleys but i know one place has a V Strom and a new place recently opened on the west side. they have some cool different bikes,Aprilla, Ducati, some sport bikes etc. Now that I think of it I will visit these shops and put in a plug for the Versys.
If any one has the chance to visit and is considering renting a bike I would advise doing the volcano in the afternoon rather than morning. The road is very busy in the morning but quite uncrowded in the afternoons. The road is in excellent condition these days and hardly a speck of gravel. Clouds surround the mountain starting about 9 or 10 o'clock nearly every morning but often you will bust out above the clouds at about 8000 ft. It does get cold up there, generally 32 deg. colder at the summit than at sea level,which is where you will start your ride. I did it once in 55 minutes but usually its nice to stop along the way (in the Clouds) and soak in the serenity, a nice break from the sun and heat of summer especially.