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I am stymied....vacuum leak.

gustovh said:
Ran all the checks and came up clean, very clean carbs. The problem slowly came on at the end of a 1000 mile ride and got worse as time passed. I am running a stage one kit and have always run the pilots around 11/2 turns. If I go much more I get a hanging idle. Still tweaking them but may be a while now as other things get in the way. She does turn up fairly good now just waiting for the hammer to drop again.

i wonder if a set off a 83 1000G would work….

V
Click to expand...

The pilot screws control fuel flow. More open, more fuel. They are not air bleeds. You might want to try 3 turns open, and see what happens.
 
3 turns open means really bad hanging idle. I know what the screws adjust, have synced to straight across the board. Maybe I’ll try my blue tune and see what I get.

V
 
gustovh said:
3 turns open means really bad hanging idle. I know what the screws adjust, have synced to straight across the board. Maybe I’ll try my blue tune and see what I get.

V
Click to expand...

3 turns out should be flooding the engine with gas not making it hang.
 
Yes, the hanging idle comes from burning off the excess fuel when the throttle is closed. The carbs as stated have the stage 1 treatment, so normal input does not always equal normal results when tuning.

V
 
gustovh said:
Yes, the hanging idle comes from burning off the excess fuel when the throttle is closed. The carbs as stated have the stage 1 treatment, so normal input does not always equal normal results when tuning.

V
Click to expand...

Actually, no. A hanging idle is caused by a lean condition, not rich.
 
Yes and no. If I turn my pilots more than 11/2-13/4 turns out I get a hanging idle, idles good at 11/2 turns. Go figure

V
 
gustovh said:
3 turns open means really bad hanging idle. I know what the screws adjust, have synced to straight across the board. Maybe I’ll try my blue tune and see what I get.

V
Click to expand...

Yep, it is time for the blue tune!
What is the color @ 1.5 turns out and 3.0 turns out?
Pilot screws have good o-rings?
At 3 turns out do you think the pilots are sucking air?
 
Won’t get to the blue tune till this weekend maybe, have another project that I’m working on.

image.jpg
 
pdqford said:
Yep, it is time for the blue tune!
What is the color @ 1.5 turns out and 3.0 turns out?
Pilot screws have good o-rings?
At 3 turns out do you think the pilots are sucking air?
Click to expand...

Maybe the O-rings start to leak if the pilot screws are open more than 1.5 turns?

gustovh Did you replace all the O-rings recently (last 5 years or so?)
 
I did that that is how I know what it does. Doesn’t even want to run 3 turns out. Fresh O rings and seals. New intake pipes. Possible throttle shaft seals as Big T throws out. Have not ridden since last adjustment or looked at the plugs yet.

V
 
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