cupbike
A "cupbike" is any motorcycle with an engine displacement of roughly 250CC (cubic centimetres). Contrast this with "litrebike" at 1000CC. If you think you need more than a cupbike for public roads, check yourself for signs you might be a SQUID.
The Ninja 250 is a sweet cupbike, and it does its ass-kicking at 60-80 MP(US)G.