I have an Ultima 127" with Super G (with velocity stack)
Jets 33/84 with 47 air bleed.

Idle Mixture Screw, 2 turns from lightly seated. (stock is 1 1/4)
Idle Speed Screw, ½ turn clockwise from engagement point.
Accelerator Adjustment Screw, two turns counter-clockwise from seated.

I am just starting the motor for the first time and it started right away but races up to about 3000-3500rpm in a few seconds.

I have gone thru the S&S instructions for the carb, manaul for the motor etc and I can't seem to get the bike to idle down.

I think it is getting too much gas and possible air leak. I have torqued down everything from the heads/ intake/ carb. That did not change anything.

I have started it on 3 different occasions but all same results.

Where did I go from here?

Thanks for your help in advance.
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100 views and no one has an opinion??? I would like to hear any advice good or bad. I plan to work on it this saturday.
Checking for intake leaks and then changing jets.
Unless someone else has a better idea.
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Jets wont affect the idle speed very much. Disconnect the throttle cable, and turn the idle screw until the throttle blade closes completely. If the throttle blade is closed and it idles @ 3500 you got a big @ss vacumm leak.

 

Welcome to HDF from the UK. Take a look at other threads and you will see it can take a great many views per reply! That simply means members that have read your post, but cannot help.

It sounds to me that either your throttle cables are not adjusted correctly, so the throttle is open when it should be closed, or your choke is not right. Don't change jets until the tickover is closer to normal levels of around 1,000rpm.

 

I think I found the issue. I tore everything off right down to the heads and found that my front intake flange was cracked and not flat.Attachment 356706

Once I get new flanges and seals I'll try it again. I'll keep you posted.
Thanks
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Intake leak is my guess. I had the carb off my Sportster a few weeks ago and didn't get it sealed up well when I re-installed. It did almost the exact same thing. I took the carb off and got it properly seated. Fixed.

 

Well I installed new seals and flanges on the intake. Put everything back on and fired it up…

Still running at 3500-4000rpm. Took the throttle cable off to make sure the butterfly is closed; adjusted air/fuel mixture with no apparent change.

I am thinking there is something wrong with the carb. I took it apart and checked everything over and i can not see anything out of place. I am positive I have no intake leaks (spray test with WD40). I am going to see if my local hop will lend me a different carb to test.

Anyone have any other suggestions?
Thanks
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Next step when you start it up make sure throttle cable is completely disconnected to carb to make sure there is not a problem with the cable and linkage. When you do that try again if still a problem, check the timing has it been messed with?

 

Tried it again and same results. Disconnected cable and it didn't move.
Just received another carb to try. I'll let you know what happens with this one.
Thanks
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