I love being on nightshifts at times - lol - gives me a good chance to study spares catalogues 
  SO.......I found some interesting stuff for my 900ss 1993 bike which will apply to most SS/SL bikes upto 95 (I believe).... 
 First up Braking Wave discs - yep ! those discs with the funny wavy edge patterns. They actually specifically list a 900ss.....and the drawback erm...well.....yes £175.99 each!!!!!! 
 Next, for our gorgeous beasts - aftermarket Rectifiers at £61.99....I've seen some on Ebay recently that went for around the £40 mark...I understand the rectifiers can be weak at times. 
 Finally some I almost glossed over until the connection bit. WHen trying to overhaul my Mikuni carbs last year - I found the importer to be VERY unhelpful with spares. I really wanted to replace the diaphragm and rubber gaskets and managed neither as they either wouldnt sell them or were extortnate !!! 
 Apparently - (gulp) Yamaha TDM850's had exactly the same carbs fitted early on as my 900ss - which different jetting etc....AND M&P sell overhaul kits (sadly without the diaphragms - but withgaskets etc) for a measely £12, nice one! 
 Roll on summer 
 Frank