Curious as I rehabilitate my 1929 rear fender, is the fender skirted all the way to the bottom where it's cut out, or inset, to accommodate the chainguard?  The R&O diagram for the rear fender shows that there is indeed a skirt, yet when I view current reproduction fenders and fenders of 101's in various states of preservation (newly restored to well ridden) I see no skirt.

My rear fender must have suffered a catastrophic chain failure some time in its life, and the area where the guard passes the fender was all chewed up, pock marked, and cracked....yet there remained a 5" section of skirt starting at the bottom edge.  So I built off that and think that's the way it should be.  Am I wrong?

Dave, those pictures are fantastic, thank-you!  So it does indeed appear that the skirting in the chainguard cutout is full width to match the overall curve of the fender.  It's a compound bending of the sheet metal in that area so I can see, perhaps, why reproduction fenders might skip that detail?

Now I've got to ponder how I'm going to add the small bend your fender is showing in the cutout from the edge, guessing it's 3/4" from the edge to match the 3/4" small skirt on the rest of the fender.  My fender has the slightest hint of a bend there on the portion of fender that wasn't ripped out by what I suspect was a chain failure...I really hadn't noticed it before due to all the damage there!

...what prompted my question was the combination of three conflicting sources, and now two additional conflicting sources:

1) drawing by George in the R&O shows a full skirt

2) picture in the R&O of the Ron Keno bike appears NOT to have the full skirt

3) my own fender has the remains of a full skirt

4) and now Dave's picture of his fender shows the full skirt

5) and Carl's picture shows no full skirt

Dave, Unfortunately I can only guess that I have 1929 sheet metal, no fender hinge and no detent rod through the tank ...my engine came from a different source.   

I understand that the 101 and the Four shared the same front fender, but I also wonder if they shared the same rear fender, the rear fender part numbers are almost the same, SA2836x on the 101 and AA2836x on the four.