I have a 85 Tri-z. It came with aftermarket pipes and performance piston and head and standard foam air filter. It has a 500 main jet and idles and revs pretty good. When I take off she goes fairly good but as I speed up and accelerate half way to 3/4, its starts sputtering real bad. I go into 2nd and easy accel. its good but as I get on it and it gets close to changing to third it sputters bad again. The needle is in middle position and air screw out about 3 turns. I have adjusted the screw some back and forth but it still doesnt take the sputtering out. Actually it makes it worse sometimes.
It had a 450 jet and at idle would sputtered hard when rev it. Couldn't ride at all. And no adjustment on screw or needle clip helped except worsened it.
The 500 made it idle a lots better but still if if take off and get on it good it will sputter bad.
Will changing the clip up or down help ar do I need to change to a different jet?
Are spark enhancer any help?