OK thanks guys.
But I am still back to being a bit confused about how worn gears could slow the pump. They are either meshed and turning together, or slipping... one of the other, right? So the pump is either turning or not. Unfortunately I am loosing full access to a garage real soon

I'll have to gauge how much space I'll have to work on it. I am also thinking I need to take the bike out and re-adjust the pilot screws for a good idle and go from there. Hopefulyl tweaking the idle/carbs will improve things. Otherwise, the slime/gunk theory is high on my probablility list, and my PITA list.