Rear brake pedal doesn't go up completely.

I installed bungee cord. It is red like my bike. (There is no extra charge to buyer of my bike, bungee cord is included for free)
I couldn't find parts diagram for 80 KZ1000 shaft.
I found diagrams for other models, brake pedal is different.
There is no spring except switch spring.

The parts fishe online suck a big one and don't show an illustration of the parts, but I've never seen a rear brake lever that didn't have a spring. I'd remove the lever and grease the pivot shaft for starters, and find that spring.

I had the same thing happen.Clean and regrease the shaft.

In the brake pedal diagram at Partzilla for the 1000-E2, part #92081-1116 is listed as unavailable in parts book. 92081 indicates that the part is a spring. If you search the part number on eebbaayy, there are several listed. Also in case something has been modified, I would also search for the brake pedal shaft to see if what's listed on eebbaayy is the same as yours.

Click > www.google.com/search?q=92081-1116&biw=1...h4Q_AUICCgC&dpr=1.71

Good Fortune!

Martin, super!
You can read what is not written!
The spring is only used for 79-80 KZ1000 shaft.
I found place where the spring should be. It is missing, no broken pieces, nothing.
One of ebay listings for the spring says it is the same spring PN 92081-1116. It is available everywhere.

79 80 KZ1000 E1 E2 ST SHAFT REAR BRAKE 43004-1008 . appears to be the same.

NOS --- 43004-1008 .

ps: I would install a new cotter pin or hitch pin. ss if possible.

Thank, I will. There should be a washer probably, it is missing.