[Spridgets] cam ID?

[Leo S]

I totally missed the diagram which specifically showed the two rings.. 
Thanks Mark.

It lists it for an 1100 but it is in a 948 along with a crank that has the 
edges of the throws ground on the leading edges so I have to figure out the 
crank next so i can get an idea of the state of tune they were trying to 
achieve.  I am not an engine builder but best way to learn is to get in it.

Leo