Grizzly 660 Air screw help 

Screw Out to richen it, screw in to lean it off.. Get it warmed up, turn the idle down as much as possible without it cutting out, then try and get the tickover as high as possible only just using the mixture screw itself.. Err on the rich side... Then adjust the tickover screw to suit... That is how you correctly adjust the fuel mixture 😉

congrats on 200 subs this helped me a lot thanks!

You should never have to mess with this screw. The brass cap is there for a reason.

TRUST ME I KNOW WHAT I AM DOING YOU CAN TELL BY HOW CLEAN MY SHOP IS

How do you tune it once the quad is running because once you get the gas tank back on you cannot reach it at all?

You have no clue what you are saying.

Gan you clean the grizzly carb without taking it off

I really hope your joking

That's a fuel screw not air.

Not helpful.