I have a 1993 750WP which I bought from a dealer in July. It has 46,000 miles on it but you wouldnt think so looking at it, it is in very good cosmetic condition for its age. I bought it to refurbish it and return back to its standard condition - there were a few blingy mods done to it which i wasnt too keen on.
Bike has now been stripped down, however i decided to drop the oil pan, I wanted to either aqua blast it or spray it black. I wasnt too happy to find a fair amount (about half a thimbles worth) of metal flakes swimming around in the residual oil that hadnt quite flowed out of the drain plug. Unfortunately I didnt take a picture straight away, but did once i'd fished some out of the sump.
The particles are non magnetic, and are silver in colour. I reckon could be a bearing, but I dont recall having any nasty noises, although the engine did vibrate around 7000 rpm, more thatn the usual Gixer "buzz" that i remember from old.
The flakes in the picture are about a quarter of the amount that came out of the sump.
Luckily the bike came with 3 months warranty, which runs out in a weeks time, so spoke with them yesterday but the boss was away. Should hopefully have some feedback from them next week.