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Main jet rejet

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04 Sep 2021 07:41 #854797 by Elfarm98648
Main jet rejet was created by Elfarm98648
Good morning all,

my Kz750H Ltd has what I believe to be completely stock jets, but with the exhaust baffle removed(by PO) the bike runs a hair lean at 45mph. Nothing that effects acceleration but I do get the occasional popping at around 4K RPM. What is the next size up on main jets? 
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  • hardrockminer
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04 Sep 2021 08:52 #854804 by hardrockminer
Replied by hardrockminer on topic Main jet rejet
Are you able to lift your needles?
I have several restored bikes along with a 2006 Goldwing with a sidecar. My wife has a 2019 Suzuki DR 650 for on and off road.

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  • gd4now
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  • Denco where did you go?
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04 Sep 2021 09:14 #854806 by gd4now
Replied by gd4now on topic Main jet rejet
If I remember correctly the stock carbs on the H models were Keihin cv34. I have attached a  table from the FSM for the carbs stock settings.  
1977 KZ650 B1
Pods and Denco header

OLD KAW OWNERS SMILE ALOT

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04 Sep 2021 09:49 #854809 by JR
Replied by JR on topic Main jet rejet
The secondary mains go up in increments of 5. I would suggest swapping out the stock secondary 125 for a 130 and leaving the stock primary 62 alone at least for now. Thats what I have done with the new Delkevic shorty which does have a baffle but is more free flowing I believe than the old Mac.

the needles cant be lifted AFAIK.

jets available from Z1Enterprises - type keihin in their search bar - and also from jetsrus.
1980 kz750E1, Delkevic exhaust

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  • gd4now
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  • Denco where did you go?
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04 Sep 2021 11:02 #854812 by gd4now
Replied by gd4now on topic Main jet rejet
Not sure if this will help any but at Partzilla it appears that the secondary main is offer in sizes other than increments of 5?

www.partzilla.com/catalog/kawasaki/motor...rburetor-parts-80-h1

www.partzilla.com/catalog/kawasaki/motor...parts-81-83-h2-h3-h4
1977 KZ650 B1
Pods and Denco header

OLD KAW OWNERS SMILE ALOT
The following user(s) said Thank You: JR

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