KZR's Bikes of the Month for 2024

Keihin cv34

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14 Jun 2022 10:28 #868781 by Maxbou92
Keihin cv34 was created by Maxbou92
Hello, I wanna know whats the function of the small one Main jet of The Cv34mm ?! Its a stock one 62.. I understand the pilot and Needle Jet (2nd Main jet) function.. but whats the function of the small one just under the secondary Main ?! do I need to play with it or just change the secondary.. Thank you 

Kz750e 1980

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  • hugo
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  • '92 Zephyr 750
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14 Jun 2022 14:56 #868793 by hugo
Replied by hugo on topic Keihin cv34
Starter jet, pilot jet, main jet.

Fuel for the bike to start (catch).   Fuel for the bike to idle.   Fuel for the bike to run

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14 Jun 2022 16:58 #868803 by Nessism
Replied by Nessism on topic Keihin cv34
The CV34's have a three stage jetting system: pilot, primary main, secondary main.  Each comes in at different times, depending on the engine's air demands.
The following user(s) said Thank You: Mikaw

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15 Jun 2022 04:34 #868822 by Maxbou92
Replied by Maxbou92 on topic Keihin cv34
Yes I know they had a time for each other! !  0-1/4 is pilot, 1/4-3/4 is Needle, 3/4- Cut off is main jet(needle jet) .. thats right?! If yes, when the small one main is active ?! 

Kz750e 1980

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15 Jun 2022 18:12 - 15 Jun 2022 18:13 #868858 by Nessism
Replied by Nessism on topic Keihin cv34

Yes I know they had a time for each other! !  0-1/4 is pilot, 1/4-3/4 is Needle, 3/4- Cut off is main jet(needle jet) .. thats right?! If yes, when the small one main is active ?! 

I'm not sure if your description is exactly correct, but clearly, all the jets are active at some point in the bike's running range.

If you are looking for a short cut when running pods, then a Dynojet kit is the answer.  And get real K&N pods.  
Last edit: 15 Jun 2022 18:13 by Nessism.
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