Brent, what I noticed on mine wasn't binding, but actual partial closing of the throttle (with trigger fully squeezed) when the rear handle would flex a particular way. This type of flex mostly occurs when I'm cutting with the bar tip down, powerhead up...like bucking a log on the ground. If I squat down so the saw's level, or cut at waist height, or make a felling cut with the saw on its side, it's not an issue. No throttle sticking going on...just linkage geometry changes that shouldn't be occuring because the handle is moving relative to the saw body and backing off of the linkage when it shouldn't be. Worse, it's not closing the fuel/air lower carb barrel...just the upper air-only one. So it throttles back and goes rich at the same time. If I consciously keep a little side pressure on the rear handle so it doesn't flex just so, it's okay...but I hope to sort this out eventually so I don't have to think about that while I'm cutting!
Mike, haven't been on here much, or getting much sawing done this winter. Been busy with work and it's been warm enough to not burn all the wood I've accumulated. Hope to step up the woods/saw time a bit before the poison ivy and undergrowth leaf back out. I miss having my hair and shirt smell like two-stroke exhaust. Still haven't assembled my PP4620/2900 Farmhand yellow/green frankensaw, but hope to soon. A friend recently dropped off a Homelite C-71 with a 36" bar on it to play with after I put in a carb kit and new fuel line. That thing is a big old armload of metal. I can't wait to hear it run and try it out.