My best buddy, and riding mate is 6'4', and 140 kg's, and is affectionately known as Monkey Boy...cause he is about as big across the shoulders as a Gorilla! good friend to have about when moving house!
He rides a TRX850, which i always joke with him, that he dwarfs it...I reckon the bike that suits you big guys is the Yamaha MT-01, Big brutish looking bike, with a big motor with lots of torque, decent handling, and it's naked! You can also get a stage 3 performance kit for it, which makes it a pretty serious piece of kit, power wise... i reckon this bike is a thinking man's crotch rocket for the big guy, just like the fz6 is for those of us who are getting to the age, who have had enough of being head down, bum up over a set of Sport Bike bars for a decent stint, but still want a bike that goes, stops, and handles properly!