I have been working on a buddy of mines 77 kz650. Mostly stock other than a mac header and exhaust. I can't get the damn thing to idle right. I will get it to idle nice and smooth, and as soon as you rev it, sometimes the RPMS will just hang around 4k and then idle back down. other times its nice and crisp. The next issue im running into is, I will get it idling nice around 1500, and then the idle will slowly drop to 1000, and then it starts getting rough and acts as if it wants to die and sometimes will if your not quick enough on the throttle. anyone have any thoughts?