my air/fuel screw is about 3 turns out. i'm trying to fine tune it but i don't know where my air fuel screw should set at (how many turns in or out) nothing or nobody seems to give me an answer??? any help would be greatly appreciated.

also it idles and runs fine but when i hit the throttle quick it and hold it it cuts out but if i ease into it revs up fine?????

 

Start your quad up and warm it up real good. Turn the mixture screw in and then out to achieve the highest idle speed. Then take it about 1/8 of a turn out.
Take it out for a ride. When coming down from a high RPM if it pops out the exhaust your need to adjust out about an 1/8 at a time until it stops popping out the exhaust. You have just set your idle mixture.

It sounds lean to me on over-all mixture. "IF" this is the case you need to fatten up the main jet.

 

ok, the jet in there now is a 147.5 i have a 150. i also have a white brothers e-series slip-on. i did notice that it does pop out of the exausht if i hit the throttle quick a few times.

so with that being said should i just up my jet???

 

I would.

"i did notice that it does pop out of the exausht if i hit the throttle quick a few times. "

That's called a lean pop through.

 

ok, i'll do that. after i do that then i can fine tune with my air screw???

the same way as you said??? take it in and then back it out???

 

No, the only thing the screw does is the "IDLE" mixture.
The needle controls mixture from off idle to around mid range.
The main jet is top end. All in all, the main jet controls over-all mixture from off idle to top end. The needle is a fine tunning aid around mid range.

BTW: Merry Christmas everybody!!!!!!!!!!!!!!!!!

 

so should i leave my screw at 3 turns out???

 

Just do the procedure I have outlined above.