The needle and seat is in the carburator... fuel shut off petcock is under tank, before carb. totally unrelated issues. That's the bad news. Good news is that neither problem is typically difficult to fix. And whenever I've changed fuel shut offs (never on a griz for the record) I've had to drain but never remove the tank.
ride it like a rental!!!
'02 Griz 660, ITP 26" XTR's on type 7 wheels, k&n kit w/filter, rear seat/cargo box, maier hand guards, gun rack.