Wait, Abe... are you saying the 650 water pump seal can be done IN the bike? I thought it was only the 500 that that worked on. Please prove me wrong as it will save a lot of labor
I won't be upset
Yeppers, waterpump mechanism is the same as the 500's. Remove the cover, and impeller, and she's right there, pop the old guts out of the cup, put new ones in and go ride.
500 pump
650
As for my comment, expect it to leak..... My current 650 had sat for at least a couple years. It dribbled a bit, off and on, then eventually stopped. I'd say ride through it for a bit, as long as it's not hemorrhaging coolant over your shoes, to see if it stops on its own.
On the other hand, my Beta 500, sat at least four years outside and didn't leak a drop....