World record price expected for steam motorbike

A steam-powered motorcycle built in 1894 is expected to fetch a world record price at auction when it goes on sale in LA.

One of only two motorcycles ever built by knitting machine inventor and Hells Angel progenitor Sylvester Roper, the Roper has a rectangular coal burner attached to the frame, feeding steam from a boiler into a small engine, which powers the rear wheel.