No problem Bill. I was mistaken in calling it an internal gear, it is actually a regular ring gear. I was thinking gear inside brake drum= internal, not quite right tho!
The one complaint I have about Vincents is the lack of a proper workshop manual. Instead of a manual there are several books, each containing good info, but none with all of the info.
There is a short reference to the speedo ring gear and it's removal in Paul Richardson's book "Vincent Motorcycle Maintenance and Repair" I couldn't find any reference to the gear in any of the other four books I use. Last time I removed that gear was about ten years ago and I wanted to make sure my memory was correct.
Glen