O-ring size for main jet holder on Mikuni VM 26 ( Z1000 A1 / A2 )

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O-ring size for main jet holder on Mikuni VM 26 ( Z1000 A1 / A2 )

30 Aug 2025 10:46
#916577
What size have the original O-ring for the main jet holder on these Mikuni VM 26?
I will change them now all on my carbs, it would be nice to know the size, thank you!
Greetings, Joe

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Re: O-ring size for main jet holder on Mikuni VM 26 ( Z1000 A1 / A2 )

30 Aug 2025 11:11
#916578
I use -009.  

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Re: O-ring size for main jet holder on Mikuni VM 26 ( Z1000 A1 / A2 )

30 Aug 2025 12:19
#916581
If possible can someone post a photo of the main jet holder?
Thank you for reading this
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Re: O-ring size for main jet holder on Mikuni VM 26 ( Z1000 A1 / A2 )

30 Aug 2025 13:12
#916586
Here's a photo, hope it helps Gd. While they all look similar, they have different air bleed hole count/location depending on application. What are You fishing for?    
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Re: O-ring size for main jet holder on Mikuni VM 26 ( Z1000 A1 / A2 )

30 Aug 2025 13:42
#916589
I am trying to make a list of these items for a vm26 fuel mixture screw carb set for a 1000 1977 kz1000, I want to get new mixture screws and o rings and the keyster set that includes the float valve and seat. I have a motor that is 1075 wiseco pistons with a stock camshaft. I am not really sure what size of parts to put in it. I am running at sea level. Can you suggest what size of brass parts to use?

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Re: O-ring size for main jet holder on Mikuni VM 26 ( Z1000 A1 / A2 )

30 Aug 2025 13:48
#916590
Now I have a 92.5 main jet and a 15 pilot jet

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Re: O-ring size for main jet holder on Mikuni VM 26 ( Z1000 A1 / A2 )

30 Aug 2025 14:09
#916592
My jet needle is 5CN8 and the clip is on the second groove from the top

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Re: O-ring size for main jet holder on Mikuni VM 26 ( Z1000 A1 / A2 )

30 Aug 2025 23:10
#916597
I use -009.  


Thank you, Ed, for the explicid info in inch and metric sizes !!!
Greetings, Joe

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Re: O-ring size for main jet holder on Mikuni VM 26 ( Z1000 A1 / A2 )

31 Aug 2025 01:04
#916599
GD are you sure you have the Kawasaki VM's. Those main and pilot sizes are what the Suzuki GS1000 8-valve used, not Kawasaki. Do you have Air and Fuel adjusters? Can't remember but think they also used/shared the same 5CN8 jet needle. Jetting, what exhaust and airbox/individual filters will dictate. Verify they are truly the VM26 Kawasaki version please, check numbers on flange and share please! And i wouldn't recommend changing out those fuel adjust screws unless damaged or pitted.  
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Re: O-ring size for main jet holder on Mikuni VM 26 ( Z1000 A1 / A2 )

31 Aug 2025 08:09
#916612
R6.8 is in front of choke plunger and 299 01 is stamped on the opposite side

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Re: O-ring size for main jet holder on Mikuni VM 26 ( Z1000 A1 / A2 )

31 Aug 2025 08:11 - 31 Aug 2025 08:12
#916613
Last edit: 31 Aug 2025 08:12 by Gdizard.

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Re: O-ring size for main jet holder on Mikuni VM 26 ( Z1000 A1 / A2 )

31 Aug 2025 08:30
#916614
I have some info that the 299/01 ID were used stock on the 77 1000 A models.  Your current main and pilot jet sizes are smaller than info I have for stock settings. Info I can find is as follows
main jet 107.5
pilot jet 17.5
jet needle 5CN8 set to 3rd slot from top
needle jet O-6 (thats an oh not a zero)
slide cutaway 1.5
pilot screw (fuel) 1 1/4 + or- 1/4
1977 KZ650 B1
Pods and Denco header


OLD KAW OWNERS SMILE ALOT

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