IH: Body Parts - Sub-01K
1979 XL, XLCH Sportster Frame Pics
Click Here to reference Sportster VIN Information in the History section of the Sportsterpedia.
Click on any pic to enlarge:
The seat pan is hard formed thick plastic and the frame has a wide tab that fits into a slot in the seat pan, completely different from previous years.
In addition to the major frame change in '79, the relationship between the frame and rear fender position changed.