2006 Brute Force running rich, air/fuel screw? - Kawasaki Brute Forum
 
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post #1 of 6 Old May 27th, 2018, 12:00 PM Thread Starter
 
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2006 Brute Force running rich, air/fuel screw?

Which way do you turn screw to lean through bike out?
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post #2 of 6 Old May 27th, 2018, 12:53 PM
 
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Originally Posted by Justinleggett View Post
Which way do you turn screw to lean through bike out?
The A/F screw only controls idle and intermediate mixture, nothing else. If you were to be looking up at it, it's like any other right-handed screw. To the right or clockwise, it closes it and to the left or counter clockwise opens it. All CV-K carbs operate within a certain limit. That is 2.25-2.75 turns out from closed.


Anything above intermediate is controlled by the main jet and it's associated parts such as metering pin, CV slide and diaphragm and float levels...which must be very exact...having then even a few thousands over their limits will make it run very rich. Also, leaking choke plungers..a very common problem, will make it run very rich.

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post #3 of 6 Old May 27th, 2018, 01:51 PM Thread Starter
 
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As always man thanks for your knowledge. Yeah it was running rich idling, check the plungers I took them out awhile back and they seemed fine today. I set the idle/air screws 2 turns out this time had them 2ĺ out. Due to having such big jets in my carbs. I thought the more I turned them out the more air I got. So o had it backwards. Going to take it for a ride and see how it does
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post #4 of 6 Old May 27th, 2018, 03:04 PM
 
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Originally Posted by Justinleggett View Post
As always man thanks for your knowledge. Yeah it was running rich idling, check the plungers I took them out awhile back and they seemed fine today. I set the idle/air screws 2 turns out this time had them 2ĺ out. Due to having such big jets in my carbs. I thought the more I turned them out the more air I got. So o had it backwards. Going to take it for a ride and see how it does
Yeah the screws control fuel w/air flow to the idle ports only..not even to the intermediates. The mains are completely separate. Now it's true that if you put too large of a pilot jet...say a #42..over a #40 or even the stock #38 you can over fuel the slow circuit. Might check to see what pilots are in it.

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post #5 of 6 Old May 27th, 2018, 03:18 PM
 
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This image may also help...although it's very basic.



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post #6 of 6 Old May 29th, 2018, 01:55 PM Thread Starter
 
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Thanks for the image
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