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Running rich 15 Nov 2020 06:25 #838508

  • Zubzero19
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undefined 81 kz440
No mods on engine
2:1 intake and single new 34mm pwk (uses keihin pilot jets)
Forum suggested #35 pilot, but its way too rich
Sized down to #30, but still too rich
Acts as if its trying to pull fuel from main jet?
(Makes a straw sucking sound)
Its is the smallest pilot I'm able to locate. Don't really know where to go from here.
Float height has been set.
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Running rich 15 Nov 2020 09:34 #838521

  • hardrockminer
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You might be getting fuel from the choke circuit. Check to ensure everything is in good condition.
I have a couple of Z1B's restored, an '80 KZ1000LTD restored, a 1981 KZ550 restored and a 2008 KLR 650 for off road fun. My wife has a 2019 Suzuki DR 650 for on and off road.

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Running rich 15 Nov 2020 16:53 #838538

  • Mikaw
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I like the custom intake but I fear your going to have a PITA tuning it. The pod filter will not stop the ram air affect. The fuel mixture is going to be ever more lean the faster you go,
1976 KZ 900 A4
1976 KZ 900 B1 LTD
1978 KZ 1000 B2 LTD
Kowledge Speaks, But Wisdom Listens.
Jimi Hendrix.

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Running rich 17 Nov 2020 17:55 #838589

  • Zubzero19
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The carburetor is new. It does idle well with the enrichment plunger pulled, but starts running rich after pressed. Is there something specific with the plunger that could of with wrong?

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Running rich 17 Nov 2020 18:04 #838590

  • Zubzero19
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I was thinking that too. Thought of fabricating a sort of cap over it that would allow it to draw from the back side of it.

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Running rich 18 Nov 2020 05:38 #838596

  • TexasKZ
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Zubzero19 wrote: I was thinking that too. Thought of fabricating a sort of cap over it that would allow it to draw from the back side of it.


I bet that would create a low pressure area inside the cap that would get more extreme with increased speed. I am not sure that would be a better problem.
1982 KZ1000 LTD parts donor
1981 KZ1000 LTD awaiting resurrection
2000 ZRX1100 not ridden enough

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Running rich 18 Nov 2020 17:00 #838616

  • Zubzero19
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I bet that would create a low pressure area inside the cap that would get more extreme with increased speed. I am not sure that would be a better problem.[/quote]

Probably not, but I have a little bit before I get there. Is there any relation to what size of carburetor I should be running vs stock size? The stock carbs were 35.89mm ID is a 34 too small?

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