Those calipers are in the 79-80 ish range, as they have the bolt (banjo) style line fitting. The early style have a hard line with an inverted flare fitting and the line enters at the top middle of the caliper and the bleeder is also at the top of the caliper. The rotors are a mystery to me. I just coverted my 77 A1 from single front to dual disc, what a ordeal, thank god for our local salvage yard.
77 KZ1000A1 - Under going a psuedo ELR overhaul
79 KE175 (gone)
81 KZ550A2 (gone)
81 KZ750E (gone)
Sure it looks OK now, but wait until I really make it pretty, with some chrome and paint and some new tires and grips and the wiring. Don't forget the gearing, and the LED's and, and, and....
