Today I was dinking around on the Ronnie's Fiche looking for wrist pin bushings for my 1994 Evo when I noticed something about the part number:

24334-36

For those in the know, the 36 means it was originally used in 1936. It was never updated nor superseded. Is this the oldest continuously used part on the current Harleys? Granted, I'm searching for parts on a 1994 Evo, I have no idea whether or not that same bushing is used on the TC or M8.

 

24334-36 ... Wrist Pin Bushing

Probably the oldest continuing number would be a fastener or bolt ... WIld guess

 

I agree probably fasteners would be the oldest, but have a different numbering system, so hard to date.
Got looking around parts book for my '08 RK and discovered these,
60001-55, license plate clamp
17945-36,pushrod cap and 17947-36, spring
67721-48, headlamp retaining screw.

 

New Winner! My wrist pin bushing stopped after the Twin Cam.

 

It may have newer part numbers but I believe the brake pedal design on our touring bikes dates back to tractors from the 1890's.

 

***** G's sense of style.

 

Massey Ferguson --- Harley Davidson ...Yep, pretty much the same :>)