As I search Craigslist, I'm totally confused. Which ones are dual sport? EXC, XCW, SF, SX, SXC, SMC, SMR, MXC, R, Enduro, Super Enduro, Duke, Super Duke ...? Why are the engines referred to as LC4 and LC8? Is there an easy way to understand this multidimensional grid: Model designation x Engine type/size x Street legality x Model Years available Thanks!