Running on one cylinder

  • jacksdad
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15 Apr 2013 14:46 #582476 by jacksdad
Running on one cylinder was created by jacksdad
So I have figured it i'm only running on one cylinder, its a twin,
I have observed fuel getting to the carburetor, am getting spark on that side, anybody got any ideas as to why,
After a short ride in the neighborhood, came back to check temperate of exhaust,.right side, about 175, left side, not even a hundred.
Any advice as to what to start checking for would be greatly appreciated.
1979 kz750 twin cyl.

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15 Apr 2013 15:03 #582479 by Patton
Replied by Patton on topic Running on one cylinder
Could start with compression test and assure valve clearances within specs.

Good Fortune! :)
1973 Z1
KZ900 LTD

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15 Apr 2013 15:55 #582490 by stevie g
Replied by stevie g on topic Running on one cylinder
Have you tried swapping over the plugs ? just because it's firing does not mean that the plug is good. I've bought new duff plugs before. Other than that you could look to see if any of the jets are blocked. I would start at the plug though, then the cap, lead, try swapping the coils over and if it's definitely sparking then try the fuel supply starting from the tank down, fuel line etc.
stephen g mackay

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15 Apr 2013 19:06 #582528 by jacksdad
Replied by jacksdad on topic Running on one cylinder
What y'all think, 175 after a mile long ride, at 25-30 sound good?
1979 kz750 twin cyl.

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15 Apr 2013 19:26 #582533 by steell
Replied by steell on topic Running on one cylinder
I think it's way to cold, seems like 300 or so would be right.
A lot depends on ambient air temp also.
KD9JUR

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15 Apr 2013 19:46 #582536 by jacksdad
Replied by jacksdad on topic Running on one cylinder
It was high 50's, low 60's
1979 kz750 twin cyl.

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20 Apr 2013 12:30 #583276 by jacksdad
Replied by jacksdad on topic Running on one cylinder
Is this float upside down?
1979 kz750 twin cyl.
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20 Apr 2013 12:31 #583277 by jacksdad
Replied by jacksdad on topic Running on one cylinder
Supposed to be a picture?
1979 kz750 twin cyl.

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20 Apr 2013 12:40 #583278 by jacksdad
Replied by jacksdad on topic Running on one cylinder
There it is.
1979 kz750 twin cyl.

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20 Apr 2013 22:40 #583372 by jacksdad
Replied by jacksdad on topic Running on one cylinder
Nevermind, figures it out, dumb me had a crimp in the left fuel line.
Feeling kinda stupid right now.
1979 kz750 twin cyl.

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20 Apr 2013 22:41 #583373 by jacksdad
Replied by jacksdad on topic Running on one cylinder
Can delete thead
1979 kz750 twin cyl.

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20 Apr 2013 22:59 #583379 by 650ed
Replied by 650ed on topic Running on one cylinder

jacksdad wrote: Nevermind, figures it out, dumb me had a crimp in the left fuel line.
Feeling kinda stupid right now.


I'm glad I never did that (well, only once). :laugh: Ed
1977 KZ650-C1 Original Owner - Stock (with additional invisible FIAMM horn)

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