I fitted a '93 RS250 fairing to my old MC18 (don't be fooled by the single swinger). It was OK, but the ground clearance was iffy. Had to make new ali brackets to match the fairing holes to the frame/sub-frame holes.

Check out some pictures:

http://www.hofton.plus.com/tom/MC18-01.jpg
http://www.hofton.plus.com/tom/MC18-03.jpg
http://www.hofton.plus.com/tom/MC18-05.jpg

And don't laugh at the hair! It was over 10 years ago.