1981 kz650 carb. question please help!!!

  • JMKZHI
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Re: 1981 kz650 carb. question please help!!!

30 Jun 2009 19:57
#303506
Just an FYI: the 81 KZ650-CSR doesn't have the handy tubing guide for routing them.

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  • CPUCK
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Re: 1981 kz650 carb. question please help!!!

14 Jul 2009 18:12
#307060
so on carb #2 is there two overflow tubes or is one for air flow??

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Re: 1981 kz650 carb. question please help!!!

14 Jul 2009 19:40
#307088
It's been a while & I'm not 100% sure, but I believe one of those lines is an overflow & the other one is for checking the fuel level. On the other 3 carbs, the overflow & fuel level check use the same orifice/nipple.

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Re: 1981 kz650 carb. question please help!!!

14 Jul 2009 20:13
#307105
CPUCK wrote:
so on carb #2 is there two overflow tubes or is one for air flow??

Are you talking about the vacuum port for the petcock?
1980 KZ650F1, Bought new out the door for $2,162.98!

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Re: 1981 kz650 carb. question please help!!!

14 Jul 2009 20:32
#307110
no im talking about the overflow valves on the bottom, and the second float bowl has 2 so i was wondering if both are overflow but like JMKZHI said it might be the fuel level check. is he correct? if so will fuel leak out of it? do i need to run a tube off of it?

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Re: 1981 kz650 carb. question please help!!!

15 Jul 2009 06:02
#307152
I have tubing on both of those ports.
You could do a test. Raise the tubes above the carbs & blow into them one at a time. The one that's open is the overflow. For the other one, unscrew the drain screw several turns & blow again. If it's now open, then that one would be the fuel level check (or carb drain).
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Re: 1981 kz650 carb. question please help!!!

15 Jul 2009 06:05
#307153
The port nearest to the accelerator pump is the carb overflow (fairly sure - but not positive).

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Re: 1981 kz650 carb. question please help!!!

16 Jul 2009 06:00
#307347
Intresting, I've never seen 2 ports. My pumpers on my '80 F1 have only the one port at each carb.
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1980 KZ650F1, Bought new out the door for $2,162.98!

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Re: 1981 kz650 carb. question please help!!!

16 Jul 2009 07:04
#307360
Another interesting difference is that the 81 model doesn't use the triangular vacuum sensor (& the orifice is plugged).

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