The BSA Gold Star Catalina Scrambler was a hand-assembled race machine, not a transformed street bike. In fact, the 1961 BSA Catalog said,”The Clubman’s model Gold Star has been developed for competitions in road and short circuit events, and its specification is such that it is neither intended nor suitable for road use as a touring motorcycle.”
It has an air-cooled OHV single 500cc engine with 38hp and weighs under 385 pounds. This British racing bike was very sought-after in the 1960′s. It’s been called the best racing bike ever built. Production of the Gold Star stopped in 1963.