The tiller handle paint, I have to look into more in-depth. Seems to me that the short version handle wasn’t black but the longer one was.
For comparison, here’s the Super C, and FWIW the illustration is an accurate depiction of what the stock motor should look like, albiet in B&W.
The Elto’s of 1930-31 did not use any rubber grips on the tiller arm.
The sliding part on the tiller handle you’re referring to is to advance the timing on the Sr Speedster. It was only installed on the electric-start model 311.
Hope it helps.
Best,
PM T2
He's livin' in his own private Idaho..... I hope to go out quietly in my sleep, like my grand-dad did..... and not screaming, like the passengers in his car...