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post #1 of (permalink) Old 08-31-2002, 10:06 AM
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Tuning a Weber...HELP identify these screws...PICS

I have one of Crow's Weber CDs but I just want to make sure I am turning the right screws. Can some of you weber Gurus look at these pics and identify these screws. I have them numbered 1-4.

Thanks
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post #2 of (permalink) Old 08-31-2002, 10:07 AM
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Re: Tuning a Weber...HELP identify these screws...PICS

Pic 2
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post #3 of (permalink) Old 08-31-2002, 10:08 AM
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Re: Tuning a Weber...HELP identify these screws...PICS

last one
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post #4 of (permalink) Old 08-31-2002, 10:24 AM
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Re: Tuning a Weber...HELP identify these screws...PICS

I am no guru to be sure but,
Let me see here:
#2 looks like the mixture screw
#3 looks like the Idle speed adjustment screw
#4 looks like the High Idle or choke speed adjustment screw.

I simply loosen the idle speed screw out a bit and then adjust the mixture screw until the motor idles as high as I can get it to go which usually is a bit lower than would be set for when it is running normally. Then I just adjust the idle speed screw in to idle it back up to normal levels. You should not need to adjust it too high to get a normal idle if you do something else may be wrong. Make sure your timing is set right first because mine did not run right no matter which adjustments were made on the carb until I set the timing right. Good luck and If you have any more questions e-mail me at [email protected]
post #5 of (permalink) Old 08-31-2002, 12:28 PM
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Re: Tuning a Weber...HELP identify these screws...PICS

#1 Idle jet holder

#2 idle mixture adjustment
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post #6 of (permalink) Old 08-31-2002, 12:29 PM
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Re: Tuning a Weber...HELP identify these screws...PICS

#3 idle speed adjustment
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post #7 of (permalink) Old 08-31-2002, 12:33 PM
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Re: Tuning a Weber...HELP identify these screws...PICS

#4 high idle adjustment
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post #8 of (permalink) Old 08-31-2002, 02:06 PM
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Re: Tuning a Weber...HELP identify these screws...PICS

Cool, thanks guys! I think I have it dialed in now. My speed screw is just a tad under 1.5 turns and my mixture screw is at 1.75 turns. Everything is working great now except, while driving, if I really snap the accelerator there is a hesitation, kinda like its not getting enough fuel. If I quickly but smoothly press the accelerator the hesitation is not there, only when I really snap it. Its really not a big deal as I am just glad to have it running smooth now. Thanks for all your help!!!

Jason
post #9 of (permalink) Old 08-31-2002, 04:45 PM
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Re: Tuning a Weber...HELP identify these screws...PICS

i'd say that hesitation is too much fuel.... not starving.... remember these carbs are designed for much larger engines
post #10 of (permalink) Old 08-31-2002, 06:31 PM
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Re: Tuning a Weber...HELP identify these screws...PICS

The reason you run into a problem when you snap the throttle open hard is a lack of vacuum , mostly from the small volume area in the stock manifold . If you have the room above the air cleaner , you can run a larger filter element . They seem to help a lot , since the air flows better into the top of the carb . Another thing that could be done is to run a larger accelerator pump nozzle . Hope this helps .....
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