Yea you are going to have to go in a bit on the idle valve screw. I have that same engine and was kinda frustrating. Kept stalling under3200 rpms. Then I started to really turn in that screw, looking at 2800 rpm. I liked the faster idle just cause I was worried about it stalling, supose I could go lower. Youl know when youv gone to far too, the engine wont transision well at all. Im not so sure the smoke thing works so well on the motor, as your throttleing up if its too rich you will see a lot of smoke?