JLarkin
Wore out three sets of tires already!
I think that is the correct rear lense for some of the Flightliners. Go to ratrodbikes.com and do a search for member "road master". He posted some lense photos. Your seat is a replacement BTW. The originals were small, unpadded, squarish seats with silver trim. Lots of Murrays had them but without the trim. They aren't very nice in reality. And 2.125 tires will not fit under the stock fenders. You might be able to find a set of balloon fenders though in the same style and make it work.