Wow big boy! your going to have to think something with over 1,000cc and high heat height. If your already experenced rider I would reccomend a BMW Twin Cyl bike. They last a long time and have many advanced features like Anti lock brakes fuel injection a engine quiet enough to hear things around you. German craftsmanship you will be proud to own. Those lould V twins Cruser bikes just don't do it. However of those types Buell American motor cycle might be worth looking into. Decatti, Moto Guzzi have some tall motor cycles. I just cannot see a 6'-6" guy making a Kawasaki 1,200 Ninja Look like a pocket bike and you with your feet folded back legs cramping.