I recently managed to find a pair of yokes from a M900ie (apparently) from year 2002.
It has the vaguely semi-circular bit of blued steel screwed to the bottom yoke that I've noticed on several other Monsters of that era. It seems to have come in about 2002 when the offset changed from 25 to 30mm and they had a little re-design at the same time, adding a peg hole stem top nut for instance.
Question is what on earth does the flap of steel do?