1977 KZ750 twin main jets

  • Ramchargerjay
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05 Jun 2020 15:38 - 05 Jun 2020 15:39 #827391 by Ramchargerjay
1977 KZ750 twin main jets was created by Ramchargerjay
I ordered a jet kit from 6 Sigma and the new main jets (right) look different from the old ones (left). Even the orifice looks different. The stock ones have a hole for the tip of the needle to sit in, the new ones don’t. They told me that they work because the threads are the same and the orifice is right. Anyone have info or thoughts on this?
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Last edit: 05 Jun 2020 15:39 by Ramchargerjay.

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  • Scirocco
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05 Jun 2020 17:42 - 05 Jun 2020 17:46 #827402 by Scirocco
Replied by Scirocco on topic 1977 KZ750 twin main jets
Never seen any main Jets like yours on a Kz750 twin carb (Mikuni BS34 ).
Any pics of your carbs would help.

www.z750twin.de/schnittmotor.htm
www.z750twin.de/vergaser.htm






My 1975 Z 1 B 900 Project

www.kzrider.com/forum/11-projects/605133...ears-deep-sleep-mode
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Last edit: 05 Jun 2020 17:46 by Scirocco.

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05 Jun 2020 17:46 - 05 Jun 2020 17:54 #827403 by Ramchargerjay
Replied by Ramchargerjay on topic 1977 KZ750 twin main jets
They’re BS38’s.
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Last edit: 05 Jun 2020 17:54 by Ramchargerjay.

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05 Jun 2020 18:05 - 06 Jun 2020 02:03 #827404 by Scirocco
Replied by Scirocco on topic 1977 KZ750 twin main jets
The BS38 needle and bleeder tube is off-set from the main Jet.
So why do you want to change the main and pilot jets, they will never wear!!!



Edit : New picture Shows the Pilot Jet position
My 1975 Z 1 B 900 Project

www.kzrider.com/forum/11-projects/605133...ears-deep-sleep-mode
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Last edit: 06 Jun 2020 02:03 by Scirocco.
The following user(s) said Thank You: Ramchargerjay

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  • Ramchargerjay
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05 Jun 2020 18:55 #827406 by Ramchargerjay
Replied by Ramchargerjay on topic 1977 KZ750 twin main jets
Gotta love the learning process......

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05 Jun 2020 19:25 #827408 by Ramchargerjay
Replied by Ramchargerjay on topic 1977 KZ750 twin main jets
The kit calls that the pilot jet, and the one I’m questioning the main jet. What is the jet pointed to in my pic?
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  • Scirocco
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06 Jun 2020 01:57 - 06 Jun 2020 02:06 #827416 by Scirocco
Replied by Scirocco on topic 1977 KZ750 twin main jets
Sorry my fault, i did mistaken the main and pilot jet position. :pinch: :pinch: :pinch:
Your picture shows the correct main jet position.
Edited my previous post
My 1975 Z 1 B 900 Project

www.kzrider.com/forum/11-projects/605133...ears-deep-sleep-mode
Last edit: 06 Jun 2020 02:06 by Scirocco.

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06 Jun 2020 12:03 #827448 by DoctoRot
Replied by DoctoRot on topic 1977 KZ750 twin main jets
If you are looking for main jets for these carbs Search N100.606-SIZE and there are lots of options. I bought some and they fit
'78 1000 Long Term Project
 '80 750G
 750 Twin Big Bore Track Bike

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