Buddha da man, y0 ----> Vacuum Leak - hanging idle <-----{for search archives}

[birdman561]

  First off, biggie ups for Buddha coming thru on a part that a starving artist just couldnt afford from a dealer. 

Cuz this is an ongoing issue with other owners, my problem was a combination of vacuum leaks.  I was pulling out as many hairs
as many times as I was pulling my carbs off trying to figger it out.
First, the carb cap had a microscopic crack in it. I couldnt see it with my eye, the way I saw it was in an act of desperation
I was applying sealer to them. For reasons I dont know but wont question, a tiny bubble blew up from the sealer !
I checked with 3x magnifiers and saw what looked like a little chip out of the plastic. Didnt look like it went thru but the
bubble sez otherwise. Get my new cap from Buddha, clean up all the KaCk, dried crusty sealer that some hammer and tong
meatfister applied to the little rubber plug caps on the carb tops, set idle mixture and the bike is running G R E A T !
Lesson....Air leaks are smaller than you might imagine. Look once, twice and again !!!

[The Buddha]

Wow ... well, cracks I have seen some big enough to pass a dime through ... prolly not one that small ...
Cool.
Buddha.

[liquid0715]

was your bike fouling plugs due to this?
I am glad you found the solution to your problem but I would like to know what was the problem?
Hanging idle?  Please explain further.
WIth Buddha's help I am trying to figure out a problem for months now.  Every clue helps me get further.

[birdman561]

was your bike fouling plugs due to this?
I am glad you found the solution to your problem but I would like to know what was the problem?
Hanging idle?  Please explain further.
WIth Buddha's help I am trying to figure out a problem for months now.  Every clue helps me get further.

Hanging idle means there was nothing I could get it to do to idle normally.
At a lite, I would adjust the idle to 1200, and when I would take off, it would
hang at 3000rpm at each shift for about 3 seconds before coming down slowly.
Coming up to a lite and letting the bike almost stall on purpose would help a little to
bring it down but it was either drop the idle adjust screw all the way down and feather
the gas at lights or 3000 rpm at shifts and for a few seconds at stop signs and lites.
For the plugs, it was actually the opposite. The side with the leak was waaaay too
lean looking, almost white and they should be a nice medium brown. As I looked
at the carb cap again, closer, it appears this was an issue before and a hillbilly fixed
it to make it look perfect, but the stuff he used must have cracked under intense
Florida heat, because the new cap and scrapping all the lumpy dried crustage out
from under the little rubber top caps fixed it. Also, the clamps holding my carbs
to the manifolds and air boxes seem a little to loose but I cant say if this was an
issue or not. Over time the rubber can compress from the clamp pressure and the
clamps should be tightened anyways.

good luck