1979 KZ1000 ST differences

Sorry for the noob questions. This is my first KZ1000 and I'm unfamiliar with the bike. I just got this bike to rescue and it's needy.
I started looking for KZ1000 parts but having trouble know what will fit this unicorn and what won't compared to the other KZ1000 models.
What are the differences? I know the center stands, grab bars, seats, and forks are different than other models. Many pipes/headers aren't listing this model.
Any information is appreciated.

Just about everything is different except the basic engine. Some things may look the same, but most everything is made larger to fit the ST. You can probably add aftermarket pipes ect, but mounting will have to be modified somewhat to make it bolt up. I like the ST, but parts are a big problem, since only made in 1979-1980.

I have a 79 ST, and have done a full restoration, so here goes: the ST shares much with the MK II body wise, but the wiring is totally unique, and a real PITA : you MUST get the factory manual specifically to the ST. Pipes are nonissue. MAC and Delkevic both make ST headers and pipes for not too much.
I highly recommend replace all the rubber carb boots, carb fuel gaskets and diaphragm in the accelerator pump and fuel petcock.
With pods and 4-1 pipe, you can jet up pretty good and it runs really and very strong. New coils too and Dyna ignition.
I did a full rewire with a Motogadget M-Unit.
This is really the best option.

Naranja, thanks for that! I had no idea that there was a factory manual specific to the ST! I've been trying to use a Clymers guide but have found it rather vague.
I have new rubber carb boots on the way (the old ones were like stone and showed cracks) and trying to get the carbs dialed in. There are pods on there now but I was thinking about looking for an air box to help simplify the jetting issues. Is your carbs using the pump? and what pilots and mains are you at with your 4 into 1?
My wires are really brittle too. Where are you able to get a harness? What shocks are you running?
Your bike looks great too! I hope to get to where your bike is at!
Thanks for the info, very helpful.

Just for info, the ST does not share any bodywork with the MKII. Completely different. All bodywork on the ST is larger. Larger, wider tank, bigger sidecovers and tail. They look close if you don't have both side by side. I own both versions and trust me they are not the same.

RonKZ650 wrote: Just for info, the ST does not share any bodywork with the MKII. Completely different. All bodywork on the ST is larger. Larger, wider tank, bigger sidecovers and tail. They look close if you don't have both side by side. I own both versions and trust me they are not the same.

I have own 3 '79 STs and a .79 MKii. To me the tank was the same shape but a little larger and different mounting.
The side covers and tail were the same size with different mounts. The ST had the 'hidden' seat latch key hole.


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Just to warn you, I Did not remember to replace the regulator/ rectifier in the new harness, and yup, it went, and I had to push it a mile or so home. Replace it. The ST is a real heavy bike.

A nice fairing came with that bike. Really nice to have on highway. I have found that lower bars that put more of your weight forward make a huge difference in the maneuverability and balance of the ST. It rides really well if you are low on it. I had clubmans on it for a while, now drag bars, but because of the noted larger size tank, I had to add about 1.5" to the bars to make sure the switchgear clears the tank on full lock. The master cylinder is a pretty big block as well that you have to work around. Both masters were honed out and rebuilt on my ST as well.

Thanks for the info. They look so close. In my area, I have never seen another old KZ ever, so I have no comparison around. It's all H-D and Gixxer country where I live.

My ST has been nothing but surprises so far. Although billed as a "low mileage" bike, in barn find condition. This thing has been pretty beat on. I've been purging the SAE nuts and bolts jammed into places, broken wires, stripped nuts/bolts/fork caps.
Around me here in SF, there is a great variety of bike running around, but very few KZ shaftys.
And I know what you mean about the weight, these things are beasts!
Going to a swap meet in Sacramento tomorrow, there might be stuff there from STs

lgyee4 wrote: This thing has been pretty beat on.

And I know what you mean about the weight, these things are beasts!

I rode an 80' ST from 88-98' and put close to 150k on her before she found a new home. I beat on her, but she took it and asked for more. She's "the beast"... and yes, something like 480lbs stock-dry. I did go with a Kerker and even @ 6000+' above sea level (Colorado Springs) for 8 of those 10, she would scream and still show 50mpg. It's called "power/weight ratio". I'm <170 and that prob helped, but I had a few times I couldn't pick her up (snow once, ice many times) Drag it off and then stand her up. Hated it, had to... Thanks for the memories, miss her...

(Middle Bike)

The ST is a great bike and heavy for sure. Way over 480lb in fact. Close to 600lb, maybe even a little over that full of gas.