There's something extra visceral and exciting about running at a race track on two wheels, but once you get hooked on reducing your lap times you're likely to burn dollars in equal measure to gasoline. There's some good news, though, because you don't necessarily need to rush out and go buy a new $34,000 Ducati Panigale V4. If you went to the Kawasaki store and bought yourself a nice lightweight Ninja 400 for just $5,200 instead, you can still get out and rip it with the big boys.