I had a quick look through my files to see if I could help as i try to keep pdf's of the 447 & 912 Rotax instructions, but though the 912 Heavy Maintenance Manual is there, there isn't anything for the two-strokes. The nearest thing I could find mentioned, in Rotax own list of manuals, is RM503. Which I don't have, sorry.
However Googling got me to the UK Rotax Agent's site which offered for £30 but no index of its contents ?:
http://www.ekmpowershop2.com/ekmps/shops/conairsports/repair-manual-462-532-582---points--electronic-ignition---1994-2887-p.asp
mike hallam.