From the info at CycleChaos & checking a couple of factory service manuals on EB:
Frame number KZT00A-023894 would make it a 1977 KZ1000-A1 (78 A2 models begin at KZT00A-027501).
The 1000B Ltds are KZT00B-xxxxxx.
The same engine number nomenclature was used on the 1000A standard models & B Ltds. and maybe the 1000C police bikes.
see manual on EB item #134393596413. back cover has beginning frame numbers plus info that highlights some of the model features such as the wheels & brakes.
My efforts go mostly into the mechanical side (to avoid calling friends with trailers), but I'll try harder than usual to make things look good.
I started with the brakes, which is my habit, just to make sure she's safe if it ever rolls at speed.The rubber brake lines certainly need replacement and those little friction pads in the front calipers don't have much "meat" left.