Well, this is an old one!
However, I only today finally got around to fitting the "3 o'clock" tap to my tank. The other main difference with this tap is that the copper gauze filter is larger and fits inside the tank, rather than the little one that sat just below the tap in the old one.
When I was renewing the inline filter I cut open the old one to see how it looked. So it did its job and stooped a lot of little flakes from getting to the carbs, (see attached).
Hi there:
quick question: is your tank outlet on the right side of the bike? mine is on the left side... I didn´t know it could change... that´s important!!
Regards,
fdo.
Hi fdo, no my tank outlet is on the left also, I am just thinking of changing the tap to the type R65 Mark has in this pic, much better for the inline filter set up

more here:
http://www.bmwr65.org/cgi-bin/yabb2/YaBB.pl?num=1305710610