In Katsuhiro Otomo's 1988 Japanese anime classic Akira, Shotaro Kaneda rides a very sweet and very fictional custom motorcycle. Well, Masashi Teshima decided to rectify that last part: he spent more than 7 years and $120,000 to bring Kaneda's motorcycle from the pages of the famous manga series into reality.
Behold, the real life Akira Motorcycle over at Nerd Approved: Link
I am slightly disappointed that it isn't electric (or hybrid), the anime made it pretty clear that it had electric hub motors and (maybe) a fuel-powered generator to recharge the batteries.
At one point in the movie Kaneda recharges the laser rifle using the motorbike and when it's damaged, there are electrical sparks shooting out around the hub of the front wheel.
I'm not the slightest bit obsessed with this bike. ;)
However, it did sound a lot better than this one. Watched the videos at the link. WTF, this thing sounds like a 50cc scooter.