plugs over pilots, no passage to main

  • KeylAmi!
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plugs over pilots, no passage to main

05 May 2025 07:01
#912127
'84 KZ700.
Pretty sure it's got the stock Mikuni BS34 carbs.
browsing here:  www.cmsnl.com/kawasaki-kz700a1-1984-usa-...partslist/35048.html
it shows a plug over the pilot. But I don't see any passage between the pilot and main.
Comparing to the carbs on an 83 GS850, there is a passage, so it makes sense to use the plug.
I want this bike to run as it was designed to. The spark plugs dont really show any indication of a rich idle, and I don't have the pilots plugged. Is the graphic from the website wrong and these carbs dont get plugs?
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  • Nessism
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Re: plugs over pilots, no passage to main

05 May 2025 07:50
#912131
Are the carbs original to the bike?  Kawasaki did use some version of BS34's without the plug and cross-drilled passage.  I think they were largely used on the bigger bikes, though.

750 flavor BS34's typically used a vacuum slide with a curved bottom surface, that may help hone in on what carbs you have.

 

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Re: plugs over pilots, no passage to main

05 May 2025 15:27
#912147
The slides are rounded across the bottom. And the air box side has the one port across the top for the slide operation, and one port to both side of the bottom. 
every carb has a vacuum port. 
it uses the pull knob style for the choke shaft, with detents.
the bowls are the bottom drain with side screw style. 
the only markings on the carbs is “mikuni” on one side and “made in Japan” on the other. 
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'84 KZ700

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Re: plugs over pilots, no passage to main

05 May 2025 16:33
#912151
Sounds like those are not the original carbs.  The stock carbs should have slides like these...

 

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Re: plugs over pilots, no passage to main

05 May 2025 16:50
#912154
Yes. Sorry for the confusion. That’s what I meant by rounded. Those look like my carbs. 
Current project:
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Re: plugs over pilots, no passage to main

Yesterday 05:15
#912191
@Nessism
If those are the carbs I have, why can't I find a passage from the main to the pilot? Do you know how far down into the pilot hole that it should be?
also noticed that the caps on my carbs are different. Mine are thin steel. Those in the pic look like thicker aluminum?
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Re: plugs over pilots, no passage to main

Yesterday 07:16 - Yesterday 07:29
#912193
Did you remove a Jet-Needle in search of the passage?  

Jet-Needle = Y-9
Jet-Pilot = 37.5
Main Jet = 105
Needle-Jet = 4BE4

Check these parts, to make sure you have the original carbs.


 
Last edit: Yesterday 07:29 by Nessism.

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