The '78

Two late model 550's were built in sequence with each other and contrary to past belief, the late models ('77 and '78) have some distinct advantages over the earlier K-series machines. Through weight reduction and improved seating position, this machine, even with its press-fit pilot jets slightly drilled, and hardly a step up on the main jet, the late model carburetors on this bike offered tremendous performance advantages with only slight modifications. This bike was the second built in a short run of the 2012 black series.