In the case of "super"sport, the term comes from racing. There are two main classes of motorcycle racing, supersport and superbike. Supersport rules dictate the bike must have less then 600cc for 4 cylinder engines and a little higher cc for twins. Superbike rules are generally less then 1000cc for 4 cylinders and a little higher for twins again. That's where the terms originated from.
Supersport World Championship - Wikipedia, the free encyclopedia
Superbike racing - Wikipedia, the free encyclopedia
Supersport World Championship - Wikipedia, the free encyclopedia
Superbike racing - Wikipedia, the free encyclopedia