There is a lot of information on the Solex.
If it were not for bikes like the Solex, we would not have our mopeds today!!
They really are cool (I don't actually have one right now)
The motors were made to be worked on with only a few tools. It is a tire scrubber also.
Do a word search on Solex, tons and tons of info!!
They are one of the true clasics of the cyclemotors!!