Solex adjustment questions - for Colin

[hambone]

Hi, last summer when you were out here, you showed me a vacuum trick to determine proper mixture adjustment, and I'll be damned if I remember what you did..something about holding yer finger 1/2 off a carb port and seeing if the engine dies...Well it was great stuff and I'd like to know what you did!
Th' ol' thinky-box aint' what she used ta be.

[Amskeptic]

Warm engine.
Find vacuum port underneath the throttle plate.
Remove little hose or plug.

A) Finger on the port.
B) Finger off the port- air rushing in now -

you have three options:
1. idle goes up
2. idle stays the same roughens a little
3. idle goes down

Results:
1. too rich
2. it's fine
3. lean

[hambone]

Fabulous, thank you!!

[Elwood]

Now that there is advice even I can understand and makes me evenmore motivated to get this new printer a-going. Im such a visual being Love the learning 101 attitude Colin and thanks for asking Hambone.

Love this place

[hambone]

I don't have the port under my carb..so I had to do it the old fashioned (insane making) way. Turn the mixture screw 1/4 turn, jump in the car and drive a few blocks, jump out and do it again, drive around the neighborhood, jump out like a maniac, do it again (Don't worry sir I'm not THAT crazy yer kids are safe and maybe your dogs) until my nuerotic mind says "close enuff"...The last time I had to adjust a carb in such a manner was on Chicago streets in 1994! Twas a pain in the ass then too. The problem is a 1/4 turn doesn't change much. I THINK I found the "sweet spot" but time will tell....
I did JB Weld the hole in the heat riser but it's leaking from the front too. I may have to pull it.

[RSorak 71Westy]

Hey Hambone the idle mixture screw only adjusts the mixture at idle speed (i.e. <1000rpm), so driving it should tell you little or nothing about the idle mix.