panhead fouls plugs

[bubba]

looking for a little help or guidance.
trying to get my panhead to run right. fresh topend,newly rebuilt heads. new pushrods.
i'm running a eletronic dist, with single fire coils, super e carb.
the bike will start just fine,(idle without the enrichner) as it idles you can hear it start to richen in fuel,lite black smoke will puff from pipes.
after idling a few minutes, if i remove the air cleaner it is very wet with gas. if i run it without the cleaner fuel looks to be coming from behind the butterfly,back out the carb. i have the accelerator pump disabled.

any thoughts?

[58flh]

Bubba--This is a classic sign of Float or needle stiking in its bore!--1st the stock jetting is plenty for a E carb on a pan!--Make-sure you set the Accel.-pump to a dribble if riding 2-up!-It helps!,Otherwise not needed!-The enrichner sometimes dont always seat fully-Make sure its closes completely when bowl is off!.--As for the Float & needle ,You can read my write-up in the K-base!--Light used emery does the job!--Do not go larger then a 70 for a main!--& set carb. when fully hot!--Turn the rpms-up a little ,then turn the mix-screw in until the rpms rise!-Keep going till they start to drop.Then back off until hiest Rpm is reached-& guve a 1/4-turn ccw!--This should be a good burn on plugs!--Put some mileage on them & check your plugs,A nice coco-brown or tan is acceptable!.However (You must bubble-test the intake for leaks-or you will never get it running right!.---Respectfully---Richie

[bubba]

thanks richie..
i have not replace the needle, that would explain were the fuel is coming from?
i have 295 intemediate, and a 72 on the main.
i did check for intake leaks with the pushrods out, it held about 10 psi.
i have installed a oxygen pung in the front pipe, so my air fuel ratio meter was reading rich as well.much better to be a little rich then lean.

[Cotten]

Bubba!

Leak-testing a manifold has nothing to do with holding pressure, the regulator does that.
Its about bubbles: http://virtualindian.org/11techleaktest.html

If you don't get bubbles, don't fix it.

....Cotten

[1951 adam]

As Richie pointed out , that is the procedure for the idle mix. I would add if it's a 74 , you can probably go 28 on the inter. Jet. You might want to pull the carb and bubble test as Tom pointed out.
Adam

[bubba]

i think i'm gonna double check with the bubbles, thanks cotton, & adam...
i have gone thru this carb a couple times, i just never replaced the needle, i didn't think it could be that, cause i had no over flow from the tube, but if it's bouncing the fuel wouldnt over flow. never would have thought of that.

is it possible to get psi behind the butterfly? from a intake valve?
they are a soild lifter, i adjusted them at first start up, and have checked them again since running it.they spin with a slight drag.

[Cotten]

Bubba!

I think what you mean by "psi behind the butterfly" is often called "reversion".
It is most commonly experienced with a long-duration/over-lap cam at kicking speeds.

If you can get it to always start first kick, its not much of an issue.

As far as the 'solid' valve adjustment, please search the Knowledge Base, as the tension depends greatly upon the design and composition of the rod.

....Cotten

[bubba]

richie.
could you explain the needle and seat striking issue, i have been thinking about it and how could that happen?
if the float is set, how could it strike up and down with some possible psi inside the bowl?
if there is psi inside the float bowl where would it be comming from?
thanks bubba

[Panacea]

I think he meant sticking...

[bubba]

huh...i read that all wrong..
thanks panacea

[Izh Kabob]

Bubba,
I think 58flh was spot on for first check. No dis to the rest of the guys but manifold leaks to me usually meant lean running/ dry/cold plugs.
My S&S carb came with multiple jets for Sporty, pan and shovel. You may have shovels installed which I think were richer.
Definite difference between the sporty and pan jets. Long ago so no tech argument here. Would take me way to long to look up the specs and installed jets if I could even find it.
Float will do this wet plug thing for sure.

Harry

[Panacea]

Ritchie already touched on this but I would like to remind you to check to make sure the enrichener is engaging the lever correctly, sometimes if overlooked this can cause fouled plugs real quick...