Yep, "Shiny Orange" was a one-year-only color, for the `77 model...except in Canada where, for reasons unknown, it overlapped with the `76 model. The unobtainium pieces with this model are the turn signal stalks, handlebar-mounted switches, handlebars (which are specific to the K4-`78 models), speedometer and, the "ho-lee grail (Batman!)"... headlight ears. That last item on the list is the most likely to to be your biggest challenge. I've done a concours-level restoration of a `77, it has its challenges and those HL ears top the list...they soaked-up more man-hours than the rest of the body & paint work combined, and the bike had a bent frame(!). If you're going for perfection, know that some of the fasteners have different markings than the earlier models. Some have captive washers. And, there's a unique mix of plating colors. The brake plate assemblies are a little different than the early bikes but, you already have those, intact. As for HL ears, `77 & `78 are the same and, since they're painted, they are a lot easier to restore than the K3-`76 which were chromed. One compensating factor is the reduced amount of chrome plated parts on this model. The TL bracket, brake pedal, sparkplug guard and top fork tree were all painted. Another, on your bike, is the handlebar compliment...which look straight and include most, if not all, of the unobtainium parts.
If that sounds like potentially a lot of extra time, effort & bucks, it can be. That said, you've got a pretty good headstart so a few stupidly-expensive pieces shouldn't have much of an impact on the bottom line total of the whole project. Every restoration is unique in some way(s), or other. You'll almost certainly get an offsetting lucky break, or two, along with the nasty surprises. Last I checked, new reproduction seats were available for this model and they looked pretty good. Running gear & electrical parts are
no problemo.The solid color makes the paint application a lot easier than the candy colors of the K0-K3 era. And, despite what yo
View attachment 58319 u may expect, this model is visually stunning when restored. You're unlikely to ever ride past another one.