Where I live the speed limit everywhere in town except residential areas is 45, but everybody goes 55. And what's worse, as soon as the light changes, it's a drag race to see who can reach that speed first. Stoplights are where a 50cc is really dangerous. Whoever was behind you has already run over you before they realized how slow you are. Most bicyclists can easily outrun a 50cc scooter from a standing start up to around 25 mph.
2002 Vulcan 750, 2001 XT225
2008 Vino 125, 2009 Genuine Stella
2012 Zuma 125, 1980 Puch Newport moped