NEEDLE & SEAT?
This is the "valve" that "Hangs" on the Floats. It can "swing" and stick as described in the repair applied. Not that common.
Polaris had some problems when they used a Brass on Brass Needle and Seat combination. Between normal or admormal ware the fuel could seep through and cause Hard starting or Flooding after not running from one day to the next. The simple fix was to, after riding Shut the Manual Fuel Valve OFF. Easier sead than done.
The real fix was to replace the "Brass Needle" with a Viton Tipped Needle. The Viton Tip is a "rubber tip. They will virtually never leak. They were a little expensive, especially if you had a "Triple", at $25.00 each.
The actually swapping of the Needles was easy once you removed and disassembled each Carb.
Attachment 10171