Air screw adjustments

[J_C]

My carbs are fouled up (have been fouled up since i bought the bike 9 months ago). I recently took them off to rejet the main jet and move the needle notch based on a recommendation of chef. While in the process I also set all the air screws to two turns out.

Now It won't idle without the choke (still pops like hell though). If it won;t idle without the choke it's lean right? So which way would I need to turn the air screws?

Thank you much

 

[tomo]

Hi JC. I`m pretty sure if you wind the screws in (clockwise) it richens things up, wind them out and it weakens the mixture. Having said that though, I know on some carbs it is the other way around. On both my GS750`s I`ve found that although the manual setting is 1 & 3/4 turns, I have to turn the scews in again one turn before the bikes will idle at all. No doubt if I`m wrong one of the other guys will let us know !.

 

[J_C]

Thanks Tomo, much appreciated!

 

[Guest]

On his CV carbs it is the opposite. Righty -leany lefty- richy

 

[J_C]

*Click* It all just came together.... thus you using 47.5s.... got it... Thanks for the clarification

 

[J_C]

How many screw turns out is too many? I'm at 4 out now and I'm just about idling somewhat consistently, though I have some popping on deceleration. I still think that I need the new jets Chef mentioned, but is 4, 4.5 turns way too many?

 

[Guest]

You're in the same boat I was when I was jetting and went up to the 47.5 pilots. My screws are out about 1.5 to 2 turns now.

 

[KEITH KRAUSE]

4 plus turns and no joy means the screws are beyond their usable adjustment range and you need larger pilot jets and possibly larger air jets.

 

[J_C]

Thanks Keith. I ordered both yesterday to the tune of 55 bucks. Jets are expensive :|