Face it: you're never going to ride a lightcycle in the world of Tron. It's just never going to happen, as Tron is a movie and therefore not real. But what you can do is buy one of these sweet Tron Legacy official replica light bike suits and get as close as you'll ever come.
Sure, for $995 you're looking at a pretty expensive set of leather clothes. But come on, they look great. And if you trick out your motorcycle enough, it could look pretty cool. And really, even if you look stupid you'll be wearing a helmet, so no one will know it's you.