Hard to see details in that small pic but from what I can see ..... chrome headlight bucket & instrument pods, rototiller bars, tank w/ offset cap, and headlight ears w/ arms sticking straight out say a Special. That means it's '78 or newer. Can't see the carb tops well enough to tell if they're alloy or chrome steel. Alloy would be '78-'79, chrome steel '80 or newer. Thing is, any of these parts could have been swapped on.