Whitelock 4.2-liter 48-cylinder Kawasaki

It’s running a one-off engine block with custom fuel and ignition systems, along with a BMW K100 gearbox, and an alternator borrowed from a car. It’s a hefty bit of kit (weighing around 1,300 lbs), so it rolls on heavy-duty Hagon wheels with stainless steel spokes and wears a Honda Goldwing front end.

The author is insane and the bike is in the Guinness Book of World Records.