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post #1 of 16 (permalink) Old 03-17-2017, 06:09 PM Thread Starter
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First time owner

Hey all, my name is Rich and I've got a 1985 Kawasaki zn1100B with just shy of 22k on it. I just bought it from a guy yesterday. I had the day off of work today so I figure, I'll start working on it.

I was hoping ya'll might be able to help me. I currently have taken off the carburetor and opened up the bowl and whatnot. Everything looked SUPER clean. I didn't check the jets because of how clean it looked. I would assume that someone had recently cleaned and/or rebuilt it. So I put it back together and put it back on the bike.

The bike will start when on choke but as soon as I take it off of choke or attempt to give it any sort of throttle, it dies. I cannot for the life of me figure out why. It smells like it's running very rich so I've looked around for an adjustment screw but I can't seem to find one. Someone on another forum sent me this link
http://zeus.mtsac.edu/~cliff/storage...d_Tutorial.pdf
Is the adjustment screw really under the cap there and do you really have to drill it to remove it? I wasn't entirely sure of that and then I wasn't exactly sure of where to go from there. Any help at all would be greatly appreciated. Thanks!
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post #2 of 16 (permalink) Old 03-22-2017, 10:39 PM
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First timer?
That thing has way more power than that mini van or whatever it is. That is a lot of bike to begin on is what i am saying.

Pic does not show if you have the standard airbox or pods. Also just because it looks clean inside does not mean it is. There are tiny jets and passageways in there that will get stopped up rather easily by just sitting for awhile with that crap ethanol inside the float bowls. I would start with a good manual and go from there.

I have not been around here much of late so do not know how information flows here now but if you word your post seeking answers you might get more looks and more replies. Just a thought.

1986 LTD 454
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post #3 of 16 (permalink) Old 03-22-2017, 10:47 PM
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Btw you might not want to pay too much attention to that tutorial about separating the carbs from the rack. There is usually no reason to do so.

1986 LTD 454
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post #4 of 16 (permalink) Old 03-23-2017, 09:03 AM
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If the bike runs on choke but dies, the pilot circuit is clogged. Either the internal passageways or pilot jets. The choke circuit is supplying a bit of gas to keep the bike running but once off choke, there is no gas. It is also possible you are not warming the bike sufficiently for the bike to be taken off choke. I have a set of GPz750 BS34 carbs on my GS1000G and those carbs are similar but jetted differently than yours but they are VERY VERY lean when cold and need to be left on choke for quite awhile before I can drive off and even then must use partial choke until the bike is fully warm. I used the GPz carbs rather than the GS carbs looking for a bit better gas mileage. they get about 4-5 mpg better but as noted, are cold blooded. If you find that you can't warm the bike and then take the choke off (showing a bit of patience), the pilot circuit likely needs cleaned out and/or new pilot jets installed.

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post #5 of 16 (permalink) Old 03-23-2017, 10:51 AM
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Partzilla sells parts for bikes and the following link will show you where the idle mixture screw is.

Kawasaki Motorcycle Parts 1985 ZN1100-B2 LTD Shaft CARBURETOR PARTS Diagram

I would put a whole bottle of Gumout for high mileage engines in the tank and run it. It does a good job of cleaning and might solve your problem. I also recommend you buy an infrared thermometer. I bought one from Autozone. You can check the temperature of the exhaust pipes and that will give you a better understanding of what cylinders are firing.

Like a big dummy, I let my zn700 sit with gas in the carbs for a year. Then it would barely run on two cylinders. I put Gumout for high mileage engines in the gas and I start it fairly often. So far, I've gotten it to run great on 3 cylinders as the Gumout works. I'll give it a few more days before I pull the carbs.

1985 Kawasaki ZN700 Shaft, 4cyl
1989 Yamaha Venture Royale
2007 Yamaha Royal Star Venture
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post #6 of 16 (permalink) Old 04-07-2017, 07:47 PM Thread Starter
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Ok all, thanks for the suggestions. I ended up replacing the Pilot jets with replacements from Mikesxs. They're the 37.5 ones just like the stock jets. I'm running the factory air box and factory exhaust. Everything is completely stock.

I ended up getting it to run! At least for a day. I took a short ride and it seemed like it was only running on 2 cylinders for a minute and then kicked back up and was fine. Parked it overnight and then it wouldn't start again. So I pulled the carbs back off, cleaned everything. Let it all soak in carb clean overnight and sprayed everything out with air. Made sure all of the passageways and jets were clean. made sure the diaphragms were functioning properly. As far as I can tell, these carbs are in brand new condition. But the thing still won't start. I have gas in the float bowls, brand new in line filter, etc etc.

I have no idea where to go from here. Suggestions?

1985 ZN1100 B2 Shaft
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post #7 of 16 (permalink) Old 04-07-2017, 07:49 PM Thread Starter
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Quote:
Originally Posted by kawpaul View Post
First timer?
That thing has way more power than that mini van or whatever it is. That is a lot of bike to begin on is what i am saying.

Pic does not show if you have the standard airbox or pods. Also just because it looks clean inside does not mean it is. There are tiny jets and passageways in there that will get stopped up rather easily by just sitting for awhile with that crap ethanol inside the float bowls. I would start with a good manual and go from there.

I have not been around here much of late so do not know how information flows here now but if you word your post seeking answers you might get more looks and more replies. Just a thought.


I know that it's a larger motor but i'm a first time owner, not a first time rider. I'm pretty comfortable with the size of the bike. I've just never been able to work on one seeing as I never owned one. That's all.

1985 ZN1100 B2 Shaft
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post #8 of 16 (permalink) Old 04-16-2017, 10:19 PM
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I just see so many ads on craig's and such with these 600 sports bikes and they will say nice bike for a beginner or something like that. I guess because it is light and easy to handle but those rockets have 100+ hp and are not for someone who has never ridden before.

Good to know you have riding experience and you will find it is nothing like owning your own. I too started out riding a friend's and then my dad's but it was great to finally get my own.

I also see from your other post you figured out what was wrong. I had the same issues with my 750 GPz. I got it as a basket case and looked at pics of the carbs and noticed these rubber plugs for the pilot jets and mine did not have them so I installed some. Finally figured it out after lots of frustration and boy did it make a difference.

Anyway happy riding.

1986 LTD 454
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post #9 of 16 (permalink) Old 04-17-2017, 09:13 AM
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If you need a manual, search eebbaayy for ZN1100 manual or KZ1100 shaft manual.
Kawasaki factory manuals have a model application chart on the back cover. some sellers include a photo of the chart.
I saw one Kawasaki manual that covers 1985. There were several for 84 --- I'm not sure how different an 84 ZN is from an 85 B2 model.





...

1981 KZ650-CSR. Competition, Sports & Road.
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post #10 of 16 (permalink) Old 04-24-2017, 01:19 AM
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There is no ZN manual per se, that I know of. You will need the KZ1100 Shaft Manual plus the 36 page supplement for the ZN version. The latter is difficult to come by.
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