How does one tune a motorcycle?

George Dempster invented the Dempster-Dumpster system in the 1930s for automatically loading the contents of standardised mobile steel containers onto the dustcart. This led to the classic Dempster Dumpmaster dustcart of the 1950s, but wheelie bins did not become commonplace until the 1970s. The term dumpster is frequently used as a generic term for a large MGB in the United States.