pilot air screw ?

[M3RL1N]

my bad too i should have said which carbs i had....now i know i was reading info for two different sets of carbs.. a case of info overload.

regards
Dave

[chuck hahn]

OH YEAHHHH..i was going absolutely feaking BALLISTIC with all the crap just the other week. I was so pizzed that at one point i grabbed a 2 lb sledge and was almost about to bash the bike to death. When you read all kinds of stuff and are stressed it all runs together and your not receptive to anything and you second guess youreslf as well..I get it!!!

[Steve]

Now, let's add a little more confusion to clear up the previous mis-quotes.

My previous statement still holds true for your carbs. THOSE ARE IDLE MIXTURE ADJUSTMENT SCREWS.
They are not "air screws", they are not "fuel screws", they are MIXTURE SCREWS.
They will adjust how much of a pre-set mixture is admitted to the cylinders.
The mixture is pre-set by the pilot air jet in the intake throat and the pilot fuel jet, down by the main jet in the bottom of the carb.
As Chuck mentioned, though, you DO have to have the correct jets to set the correct mixture.
You then use the MIXTURE SCREWS to adjust how much is used.

Turning them clockwise will lean your mixture, turning them anti-clockwise will richen it.


On the earlier VM carbs (the ones you DON'T have), there are separate screws to adjust the mixture, so they do have "pilot air screws" and "pilot fuel screws".
On the BS-series carbs, like yours (also known as "CV carbs"), there is only the MIXTURE SCREW.

If the bike has been running (maybe poorly, but running), turn all the mixture screws in carefully until they seat lightly.
Back them out 2.5 turns to start with. Warm up the bike, turn each screw in until you hear the engine start to slow down a bit,
then turn it back out about 1/8 turn, go to the next screw. That should clear up your problem.

.

[chuck hahn]

Steve..he clarified that as he said he was reading info for BOTH styles of carbs and it was blending together and causing the mix up.....

[M3RL1N]

thanks guys. i think i'm clear now and as soon as i get chance i think i have the right info.

"Turning them clockwise will lean your mixture, turning them anti-clockwise will richen it."

thats the bit of info i was missing.i then read 4 or 5 tutorials and confused myself stupid
i was looking for the standard settings in manuals with cv carbs as to how many turns out, and all i could find apart from "preset" was 3 1/2 turns out, which left me with 1 and 2 plugs clean and 3 and 4 sooty,turning the screw anticlockwise to let more air in was not helping,but neither was anything else i tried, so i kept going back to 3 1/2 turns out (going round in circles)

going to start at 2.5 turns out and go clockwise as soon as i get chance.and just to clarify everything else has been done to the carbs over the last 2 months.leaving the original jets in and replacing o-rings gaskets and such other than tick-over they are running superb. and bike pulls like a demon.

thanks again for your help guys.and sorry i caused more confusion.

regards
Dave

[Mike]

thanks guys. i think i'm clear now and as soon as i get chance i think i have the right info.

"Turning them clockwise will lean your mixture, turning them anti-clockwise will richen it."

thats the bit of info i was missing.i then read 4 or 5 tutorials and confused myself stupid
i was looking for the standard settings in manuals with cv carbs as to how many turns out, and all i could find apart from "preset" was 3 1/2 turns out, which left me with 1 and 2 plugs clean and 3 and 4 sooty,turning the screw anticlockwise to let more air in was not helping,but neither was anything else i tried, so i kept going back to 3 1/2 turns out (going round in circles)

going to start at 2.5 turns out and go clockwise as soon as i get chance.and just to clarify everything else has been done to the carbs over the last 2 months.leaving the original jets in and replacing o-rings gaskets and such other than tick-over they are running superb. and bike pulls like a demon.

thanks again for your help guys.and sorry i caused more confusion.

regards
Dave

Righty leany, lefty richy. Just remember that

[saltcitytattoo]

i am a little late but here it what i noticed on mine ( i still had the plug in my mixture screws ) that the center two were half a turn out more the the outer two. i think with the stock setup where the inner two carbs pull less vacuum then the outer two you might want to keep that in mind with a stock setup. as for mine 82 1100ez with pods and 4 to 1 exhaust starting with them the same was a big help.