Harley uses the same seat tab on the Freewheeler seats as the rest of there Harleys . This is a mistake on the Freewheeler as the 1/4 X 20 seat bolt is under sized in the seat tab. This is because there in no centering insert like like the one that's molded into the two wheeled bikes threaded fender insert. This causes the seat tab to have a bit of play side to side and back in fourth (makes it hard to get seat bolt in same place every time).
The quick fix is a the 1/4 washer that comes on the handle bar control housing bolt. It is the perfect size to fit in the seat tab hole and make it the rite size which is a 1/4 inch. This centers everything up.
If you put the washer on your seat bolt and go slow the washer will press right into place and stay, perfect pressed fit. ( I had extras control housing bolts because I changed the control housing bolts to chrome )
Also new Harley Sundowner seat installed with washer mod.
Ride Safe All,
Bill G