Um. Okay, aside from making sure your clutch is adjusted properly, this is classic throw out bearing issues. Live with it (learn to shift to neutral coming up to a light) or fix it:
- take off right side cover
- remove clutch springs and face
- remove clutch plates (and might as well do these now)
- remove clutch basket (paying attention to washer order carefully)
- remove old too-few rollers throw out bearing
- replace with new many rollers throw out bearing
- reinstall clutch basket (paying attention to washer order carefully)
- reinstall clutch plates
- reinstall clutch face/springs
- reinstall right sidecover (with new gasket, of course)
Done.
There are a few other "might as wells" in there as well, like oil pump, clutch springs, check to make sure you still have your washer at the bottom of your tach drive... Little things.
Or... Live with it.