The first-year K-model used a stud extending from the shifter holder. This required a flat washer, a lockwasher, and a nut.
All later years substitute a lock tab for the lockwasher, and dispense with the nut and flat washer.
|The Iron Sportster trap door assembly holds the mainshaft, countershaft, and shifter mechanism.
The Iron Sportster shifter comes as the 34009-52 assembly.