I don't run a Dominator but I agree about leaning out or taking out the intermediate circuit. I will say on my 850 DP I jetted it for mph at the track and found out it was a tad rich when at part throttle cruise. So I just dropped my primary main jest a tad and then opened up my primary power valve channels to make the fuel up at full throttle. I only dropped the primary main jets a little but it made a big difference when cruising at part throttle. Cleaned it up just right and plugs look much better. Ron