Cylinder 3 hot, other 3 not.

  • kanexx
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Cylinder 3 hot, other 3 not.

10 Sep 2025 19:34
#917007
Ok so I did the whole valve clearance and now all are within spec. I got new plug wires , plugs gapped them. Now it doesn't seem to run right. Starts fine idles but sure dont sound the same. Carbs are synced pilots are clean. Timing light is good on all but cylinder 2 and cylinder 3 runs hotter than other 3 . ...? The F dont even show up . 3 is a bit shaky on the F mark 1 and 4 are clear.  Not sure what i did. Anybody got any answers or ideas would be greatly appreciated.  Thanks. 82 kz 750h3


Kane

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  • TexasKZ
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Re: Cylinder 3 hot, other 3 not.

11 Sep 2025 05:07
#917017
Are the coils connected to the correct plugs? One coil fires 1 & 4, while the other fires 2 & 3.
1982 KZ1000 LTD parts donor
1981 KZ1000 LTD awaiting resurrection
2000 ZRX1100 not ridden enough

www.kzrider.com/11-projects/620336-anoth...uild-thread?start=24

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Re: Cylinder 3 hot, other 3 not.

11 Sep 2025 05:12
#917018
Here s how they should be wired.

1982 KZ1000 LTD parts donor
1981 KZ1000 LTD awaiting resurrection
2000 ZRX1100 not ridden enough

www.kzrider.com/11-projects/620336-anoth...uild-thread?start=24

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Re: Cylinder 3 hot, other 3 not.

11 Sep 2025 05:14
#917019
Here is a copy of the factory service manual, just in case you do not already have one.

www.kzrider.com/filebase-alias?task=down...id=1266&catid=17&m=0
1982 KZ1000 LTD parts donor
1981 KZ1000 LTD awaiting resurrection
2000 ZRX1100 not ridden enough

www.kzrider.com/11-projects/620336-anoth...uild-thread?start=24

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Re: Cylinder 3 hot, other 3 not.

Yesterday 19:37
#917041
I read the topic and for a second thought you had a KZ1300 :)
1979 KZ400 Gifted to a couple of nephews
1967 Yamaha YCS1 Bonanza
1980 KZ440B
1981 Yamaha XT250H
1981 KZ440 LTD project bike
1981 GPz550
2013 Yamaha FZ6R

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  • kanexx
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Re: Cylinder 3 hot, other 3 not.

Yesterday 21:33
#917048
Yes . It dont matter top or bottom as long as clutch side is 2 and 3 and throttle is 1 and 4 correct? How bout the primary and secondary wires, I know g and r left and b and r right.  

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Re: Cylinder 3 hot, other 3 not.

Yesterday 21:36
#917049
Beyond the coils I am putting the old ones back on, I replaced with new oe coils then the problem started.

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Re: Cylinder 3 hot, other 3 not.

Yesterday 21:48
#917050
Beyond the coils I am putting the old ones back on, I replaced with new oe coils then the problem started. So I have valve cover off again, I had it set on t mark and not lined up exactly parallel with each mark as you can see in photo. I am good on my number of links for sure. 

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Re: Cylinder 3 hot, other 3 not.

Yesterday 05:17 - Yesterday 05:19
#917054
Yes . It dont matter top or bottom as long as clutch side is 2 and 3 and throttle is 1 and 4 correct? How bout the primary and secondary wires, I know g and r left and b and r right.  
Either coil can do either set of cylinders. What matters is the wiring. Assuming (dangerous) that everythinh around the advancer at the end of the crank is set up according th the factory, the green and red wires go to the coil that is connected to 2 & 3.  The black and red go to the 1 & 4 coil.

Has any part of the timing mechanism been taken apart? If so, be certain everything is in the right spot,.
 
1982 KZ1000 LTD parts donor
1981 KZ1000 LTD awaiting resurrection
2000 ZRX1100 not ridden enough

www.kzrider.com/11-projects/620336-anoth...uild-thread?start=24
Last edit: Yesterday 05:19 by TexasKZ.

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Re: Cylinder 3 hot, other 3 not.

Yesterday 05:33
#917055
Why is the bolt on the exhaust cam in the square hole?
1982 KZ1000 LTD parts donor
1981 KZ1000 LTD awaiting resurrection
2000 ZRX1100 not ridden enough

www.kzrider.com/11-projects/620336-anoth...uild-thread?start=24

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Re: Cylinder 3 hot, other 3 not.

Yesterday 05:38
#917056
Looks like the cam sprockets are installed incorrectly. The intake cam sprocket should be installed with the bolts in the square holes and the exhaust sprocket with 5e bolts in the round holes.

1982 KZ1000 LTD parts donor
1981 KZ1000 LTD awaiting resurrection
2000 ZRX1100 not ridden enough

www.kzrider.com/11-projects/620336-anoth...uild-thread?start=24

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Re: Cylinder 3 hot, other 3 not.

Yesterday 07:01
#917057
That i have not touched , I have just done valve clearance in which I have not touched those bolts. I will look in my manual, I see you are looking at kz1000, would it be the same as kz750 

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