Is this on the bottom of my carb? OK and another question i have a hmf pipe K&n airfilter 165 jet. How much and which way do i turn the air screw? And what will this do for me? thank you [img]i/expressions/face-icon-small-smile.gif[/img]

 

i would put in a larger pilot jet like a 42 or so. with this in place i would start about 2.5 turns out from lightly seated. without the larger pilot in place, i would start around 3 turns out. it is a bronze colored screw on the bottom of the carb. it is near the idle adjustment. i would go smaller on the mainjet too.

 

On almost all 4 strokes, its a mixture or pilot screw...2 strokes have air screws. Turning it out, will make it richer, and turning in is leaner.
It only effects idle and up to 1/8 throttle.
The screw is the fine tuning for the pilot jet. Think of the jet as being the coarse adjustment, and the screw trims that , as a fine adjustment.
This article explains jetting, and has a procedure for adjusting the mixture screw.
jetting

By the way...wheres deepwoods? I think ive been there.

 

Hmf told my to do a 165. Iam not a big mechanic in any way. How hard is it to change the neddle position and pilot? What all will this do for me will i feel the difference? thanks for the patience.

 

The difference you will feel, is gonna be on the upper rev area. The reason you rejet is to get the maximum out of the pipe, and filter, and keep the mixture at the proper ratio.

Check out this article on changing the pilot jet.
exriders