The 2015 Kawasaki Ninja H2 was the first production motorcycle to reach 200 horsepower using a custom supercharger from ...

Built with helicopter tech and aerospace engineering, this turbine-powered bike ignores every motorcycle convention.

This whole thing is already pretty ridiculous, but some have become even wackier over the years as owners have transplanted other engines into them. We've seen one that had a 650 cc parallel-twin out ...