Im pretty sure there is a single idle adjustment speed screw for the bike. My VS650 has one.
when I first got my bike I thought it was idling too fast, when I let off the throttle in gear it seems like it was coasting instead of slowing down, so I backed it off a bit.
I have an acoustic tack around somewhere and I have been meaning to check the warm engine idle speed.
Something to check at least. If the bike is idling too slow its not good for the bike, the oil pressure can drop while idling.
the other thing to consider is if the valves need to be adjusted. A tight valve will make the motor misfire.
between the two, it only takes a few seconds to turn up the idle a bit. If the bike stop sputtering then you got it. If the problem persists then you need to look at the valve adjustment and possibly other tune up items.
Last edited by KCW; 11-05-2016 at 02:02 PM.