Good point Tony, Mine was a 1982 R80, Barry's bulletin was 1984...... You new kids always get the good stuff 
That would do it!
And I must say that at least this group is mercifully free of the fools that infest some other BMW forums. In another nameless forum I was accused of being a liar because:
"The R65 engine is much smaller than other boxers and has a special frame and "proper" boxer engines will not fit in the R65 frame"
I showed the idiot in question a photo of an R65 frame (1979 edition) when it was an R65 and then a current photo with a Paralever rear end, K100 front end, R100 engine and dressed in R100RS fairing and the same idiot then modified his position to:
"Well the 1979 model had the same frame as "real" boxers, but with short forks and swing arm."
I tried to politely correct his errors and asked him how come "standard" gearboxes bolt up to the "small" R65 engine and how he would explain that the R89ST frame and R65 frame are identical (and except for some minor brackets the same as early R80G/S frames - he said he would get back to me with "the facts", but he never did.
On this and other mythological topics (another of my favourites is the structural superiority of R90 engines over R100s) reign supreme.
I quit that forum after another discussion started that centred on the origin of gearboxes during the 80s/90s peak demand for BMWs. Apparently demand was beyond what the BMW factory could meet so another company (a well known German gearbox manufacturer) was sub-contracted to assemble and test gearboxes. The idiot discussion was whether BMW assembled gearboxes were superior to the contract assembly ones. (For what it is worth, and for very practical reasons I think the reverse would actually be true, not that I want to start a fight here!). Anyway I eventually made the comment:-
"So what you are saying is that my Romanians are better than your Romanians." .
They just didn't get it.
What's next I wondered, Bosch diode plates are better than Werle ones? I don't know if those depths were ever plumbed cause I pulled the pin. In fact this is now the only BMW forum I subscribe to, although in view of my recent R1150GSA purchase I am considering a temporary re connection to get service and exchange data.
I sincerely hope that in this forum we can continue to all remain friends and from time to time disagree without it turning into a slanging match = the true strength of this group.
