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Z 1000 St E2

Work in Progress

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Pigford
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Re: Z 1000 St E2

#46 PostAuthor: Pigford » Sun Oct 21, 2018 4:54 pm

If it's leaking at correct torque - more probably won't cure it :??
And on the 7th day... Zeds were created!

Dunlop4
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Re: Z 1000 St E2

#47 PostAuthor: Dunlop4 » Sun Oct 21, 2018 6:41 pm

It looks like i will have to do a top end strip to replace the base gasket and establish why it leaked in the first place.
What are the best base gaskets to use, the one on there now is an athena. Are cometic base gaskets ok or are genuine
kawasaki best to use.

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Al
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Re: Z 1000 St E2

#48 PostAuthor: Al » Sun Oct 21, 2018 8:44 pm

Cant comment on the ST but with the J 1000 its OK to go to 39 ft/lbs where the standard setting is 29 ft/lbs using standard barrel studs.

AL
1981 J1

Philippe
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Re: Z 1000 St E2

#49 PostAuthor: Philippe » Mon Oct 22, 2018 4:19 am

Hi Dunlop 4
I'm afraid you'll have to replace the base gasket. I think something went wrong when replacing it, maybe it was torn or a piece of the old gasket is still sitting on the cylinderbase thus preventing the new gasket to seal.
When you decide to replace it, you don't have to take the engine out , the cylinderhead and the cylinders come off while the engine is in the frame.
You'll have to use new gakets. I prefer to use Kawasaki gaskets or Vesrah gaskets.
Good luck with it.
GrtZ
Philippe
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hartyb
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Re: Z 1000 St E2

#50 PostAuthor: hartyb » Mon Oct 22, 2018 1:59 pm

a quick question what oil grade are you using

as I remember a long time ago there was a trend to use some oils that were 0w-40w and a like and they would leek
when returning to the the right spec oil Motorcycle grade not car the problem would go away

not that I am saying I would uses them there are some additives that make the gasket swell and seal
could be worth finding out about

when resembling with new gaskets a very and I mean very fine smear of as high end engine gasket sealant is now considered good practice, also paper gaskets can be pre soaked in light oil to expand them, some uses WD40 some other like oils

good luck
Z1000 Z1000A1, Z1000ST, KZ1000p, Z1000Mk2 which I am collecting parts for.
Z1R ready for paint, Z900A4 running,
Z1300 1979
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ZZR1100 Purple and orange
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along with some lesser makes :eek

Dunlop4
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Re: Z 1000 St E2

#51 PostAuthor: Dunlop4 » Mon Oct 22, 2018 6:25 pm

I am using rock oil gamma 10 40 mineral oil and stag wellseal was used on the gaskets.

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Re: Z 1000 St E2

#52 PostAuthor: Avon ST » Sun Nov 04, 2018 3:56 pm

Fitted accelerator pump carbs today I took the slides and jets from a standard set of carbs and swapped them
IMG_6104.JPG

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Re: Z 1000 St E2

#53 PostAuthor: Avon ST » Sun Nov 04, 2018 4:10 pm

When i fitted these carbs, there is an improvement but there is delay to return to idle

Philippe
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Re: Z 1000 St E2

#54 PostAuthor: Philippe » Sun Nov 04, 2018 5:07 pm

Hi Avon
the carbs I see on your work bench are not from an ST but from a late Z1A or from a Z1B.
These carbs are 28 mm but difficult to adjust! Are you sure you're going to put these on your ST ?
GrtZ
Philippe
the differences between a little boy and an adult man is the price and size of their toys!

Dunlop4
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Re: Z 1000 St E2

#55 PostAuthor: Dunlop4 » Sun Nov 04, 2018 7:51 pm

Yes you are quite correct. What he is trying to say is that he had a problem with a set of carbs not returning to idle. These were bought off a another club member, advertised as being from an american KZ 1000 ST. It turns out they were off a KZ 1000LTD B4 accelerator pump type.
What we did to fix the problem was to swap the slides and needles as well as the main jets to the accelerator pump carbs. He refitted these to the bike and the is a big improvement, he did not road test it today as it was raining. There is still slight delay to return to idle.

Dunlop4
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Re: Z 1000 St E2

#56 PostAuthor: Dunlop4 » Sun Nov 11, 2018 6:27 pm

Took the bike for test ride after replacing the Z1B carbs, with 28mm accelerator pump carbs off a LTD. A big improvement was found and the revs holding after shutoff has gone.
IMG_6204.JPG

So one problem solved. We did a compression test on the hot engine after the test run.
No: 1 145 PSI No: 2 133PSI No:3 128PSI No:4 101PSI and this is after a hone new rings and valves.

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Re: Z 1000 St E2

#57 PostAuthor: Philippe » Sun Nov 11, 2018 6:41 pm

Hi Dunlop4
don't panic, give her several hundred miles before you mesure the compression again, keep an eye on the oil consumption and don't rev her over 4000 RpM. After 500 miles do another compression test.
GrtZ
Philippe
the differences between a little boy and an adult man is the price and size of their toys!

Dunlop4
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Re: Z 1000 St E2

#58 PostAuthor: Dunlop4 » Sun Nov 11, 2018 7:03 pm

Hi Philippe
The problem is there is an oil leak on the base gasket, which after this test ride is not as bad as it was. If i have to change the gasket, i may as well address the compression issue at the same time. The bike does appear to be running well though.

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Re: Z 1000 St E2

#59 PostAuthor: Dunlop4 » Sun Jan 13, 2019 8:58 pm

Took the bike for test ride today, it ran a bit ruff until it warms up. The problem of returning to idle has gone away.
IMG_7006.JPG

The base gasket is still leaking.

I did another compression test this time the results are Cylinder 1,155 2,145 /3, 145 and 4 120.
So a little better than last time.
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