you can adjust the position of the slide by turning the idle speed adjuster.
if you pull your seat off right under the point where the seat and gas tank meet, there's a knurled knob w/ a slot in it. this controls the level of the slide, and in turn the idle speed.
turn it clockwise to increase speed and counter clockwise to decrease speed.
once you've adjusted the idle speed to the level you want, you have to make some fine tuning adjustments to the air screw. most likely you'll need to turn it in, but there's no way of knowing till you try it. listen to the engine speed as you turn it, you want it to be as high as you can get it w/ the air screw.
then check the plug to make sure the mix looks good.