My question is this: I can never find anything on the internet I really need/want to know, and this is an example. When installing new throttle/idle cables, or adjusting the ones that are already on there, do you set the idle screw at the point where it just begins to engage or 1/2 turn (or some other distance) beyond the engagement point, (s&s super e). In other words, at what setting should the idle speed screw be at before you begin to install or adjust your throttle cables, or does it even matter?
Install your throttle cable so that there is no tension on the throttle pivot at the carb. Slack enough for no tension, but not too slack where you need to turn a bunch of degrees on the handle bar to get the tension.
As far as the idle screw, it's a 1/2 turn when the screw makes contact. You just want to open up the throttle a crack, and that'll give you a good idle, or at least a good starting point to tune that idle.
1978 Harley Ironhead - the Italian Rat