idle adjust screw at end of turning

[BBROWN1664]

It may help, it may not, but the idle should be between 1150-1250. I tend to set it to 1250 as its easier to work out on the rev counter,

[Fazerider]

[quote author=Gnasher link=topic=24194.msg280469#msg280469 date=1527349317]
[quote author=psyfi_1 link=topic=24194.msg280466#msg280466 date=1527344048]
this is what i did cleaned carbs out check pilot settings most where out some by 2 turns seated them and then turn out two turns got carbs back on bike set tps sensor.... then put on my gauges and balanced 1/2 then 3/4 then between 1/2 and 3/4 got them all level when blipping throttle.... but i forgot to set idle after wards so today i warm her up to running temp and adjust the idle screw on thing was it wouldnt turn any further i got it to 1000 -1100 rpm but it will not turn any further up it will only drop it down loads till it stalls

Then something is wrong mate, you usually have to turn the main idle screw down not up, the butterfly's aren't open enough, which means they're not pulling enough Hg.  The 2 turns out should give you the correct air setting, from there you have to set the Hg it MUST be between 230 - 250mmHg on every carb before they're balanced the number is very important.  Then the fun starts you've got to get 1/2 balanced still pulling the Hg then 3/4 and then balance 1/2 & 3/4 still pulling the the Hg figure if you can't get them all in balance pulling the Hg figure and idling at the correct speed there's something wrong. 
[/quote]
I'm a bit confused by this - if I adjust the vacuum to 230-250mmHg on each carb using the pilot screws, what is left to adjust using the balance screws?
[/quote]

Me too.
Adjusting the pilot makes the mixture richer or leaner at very low throttle openings. I always thought the correct way to judge the setting is with a gas analysis probe in the downpipe for each cylinder (using the little port on the OE headers).
With no gas analysis equipment and aftermarket exhaust system, I’ve always set the pilot by counting turns.

[Steve3351]

Hi Foccers...WOT IS hg and how do u measure it...??!!
I'm having similar carb probs... :'( bike is running ....but ROUGH. I went to great lengths building the home-made MANOMETER...
only to find that i couldn't get 1 & 2 into balance no matter how much I adjusted the screw...of course I unscrewed it all the way out and
had to buy a special torch (EBAY) and long reach screwdriver (LIDL) ....and had to glue the screw to the screwdriver to get it back in.
Depressing....... am thinking of upgrading (?) to fuel injection....I'm reluctant to even give this problem to the bike shop...do they know how to do it properly...do they give a FOC...?!!? :z :rollin :evil

PS i also adjusted the pilot screw to two turns out...like it says in the (YAMAHA) workshop manual :book