Does unscrewing the air screw make it richer or leaner? Thanks!

 

It makes it more rich if you un-screw it.

 

Yep.
Counterclockwise (turning it out) makes it richer, and clockwise (turning it in) makes it leaner.

 

Thanks guys this info really helped me out this weekend.[img]i/expressions/face-icon-small-cool.gif[/img]

 

No problem man. Keep on ripping![img]i/expressions/face-icon-small-smile.gif[/img]

 

No prob.
BTW, just for reference next time, its a fuel screw, not an air screw. An air screw will be the exact opposite, but I knew what you meant since you were talking about a YFZ. [img]i/expressions/face-icon-small-wink.gif[/img]