1.) Maybe a little, but not really. I don't hear mine.
2.) Uh, nope, if you are pulling on the lever at the same time the kickstart shaft should basically free spin. Without the clutch engaged, it's not acting upon the engine at all. I know this from experience, took me a little while to figure out what was going on, turns out my adjuster was TOO far in.
3.) I really don't see a reason to need it. Unless your old one was broken.
I would really look into checking the adjustment on all the pieces, the screw on the cover, the cable into the cover, and the lever. I have had to do this already once, as things just get outta whack sometimes. And it really only takes a little bit to screw things up, ask me how I know. ;D Did you check the operation of the clutch? I.E. take the cover off and verify things are acting as they should? If not, you really should(heads up, there is oil in there). It helped me out a TON. Takes one part out of the equation, as the first time, it wasn't the mechanism, it was the plates being too friendly with each other...just a thought..
Steve