It may be a while before another street legal dirt bike knocks the 500 EXC off our list. There has never been a street-legal enduro motorcycle as capable as this KTM. The KTM 500 EXC is essentially a full-blown racebike with lights, mirrors and turnsignals. It's fully able to line up at the start of a cross-country or desert race and compete in stock form. With heaps of power, the big EXC makes sand and loam seem like hardpack, and it turns any asphalt into a dragstrip. Want the best way to connect some trails? This is it.