Replacing the fuel line and vacuum lines

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Replacing the fuel line and vacuum lines

01 May 2025 10:31 - 01 May 2025 12:35
#911966
Hey guys I’m new the group. I have a 1976 kz400 with dual carbs. How do I run the fuel lines correctly? I’ve seen all sorts of info but I’m getting confused. There are 2 ports at the petcock, a fuel inlet in the middle of the carbs (fuel rail) and one inlet on each carb as well. How do I correctly set this up? TIA!  
Last edit: 01 May 2025 12:35 by Street Fighter LTD.
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Re: Replacing the fuel line and vacuum lines

01 May 2025 15:35 - 01 May 2025 15:38
#911976
That is interesting. According to the factory service manual, the petcock should have a single outlet. The hoses on the bottom of the bowls (#eight) are for drain or overflow. The ones on the sides (#5) are the bowl vents, and the fuel inlet in the center should be on the outside of the #2 carb (#11).

 
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Last edit: 01 May 2025 15:38 by TexasKZ.
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Re: Replacing the fuel line and vacuum lines

01 May 2025 16:22 - 01 May 2025 16:34
#911979
I do not know this for fact but the pic of his carbs look more like the carbs on the 77 version of the 400 than the earlier versions.

I would also state that 2 ports on the petcock does not mean it is a vacuum operated one. What if anything is stamped around the petcock lever?
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Last edit: 01 May 2025 16:34 by gd4now.

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Re: Replacing the fuel line and vacuum lines

01 May 2025 18:42
#911984
Here is a parts diagram for the 1978 Kz400. They look like what you have.

www.partzilla.com/catalog/kawasaki/motor...uretor-assy-kz400-a2
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Re: Replacing the fuel line and vacuum lines

01 May 2025 18:45 - 01 May 2025 18:49
#911985
I just took a closer look at the fsm pic above, and dang if it doesn't look like there is a spot for a fuel line between the carbs, in front of the balance screw, #12.
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Last edit: 01 May 2025 18:49 by TexasKZ.
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Re: Replacing the fuel line and vacuum lines

02 May 2025 13:26
#912025
Lets a pic talk......

 
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Re: Replacing the fuel line and vacuum lines

Today 18:02
#912117
Oh great. So I bought the wrong carbs is what you’re telling me……   I do need help with the throttle cables. One of them has so much slack but I’ve backed them all the way out already… help!!!

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