Like peeling the layers away of a bad onion (1994 Triumph Trophy) I found evidence that the Clutch Release (slave) cylinder has sprung a leak. Having disassembled it with the intention of replacing the seal, I have found a witness mark within the cylinder created by the bike being unused for 3 years (see photo) I can hardly feel it with my finger nail, would a quick wipe round with 1200 grit wet and dry to remove it be ok or am I looking at a complete (expensive) replacement? P.S. if you ever do this, ferchrists sake be careful, I used a bicycle pump to pressurise the piston out, because it was slightly stuck it suddenly flew out at quite a rate, luckily I had it wrapped in rags.