Went into the dealer last weekend.
Sat on an S83, Hmmm... that tank and speedo would look good on an S40.
Sharks kept nibbling and I ran out of questions that would send them scurring off for an answer. So I told them I was shopping for parts and they left me alone.
If you are looking for a speedo cup, this might be the one to look for. Definitely a side mount cable driven speedo.