if your clutch was in good nick before the fuel problem, then i'd strip it, clean it thoroughly x 2, let it dry out completely, then reassemble, that worked for me.
if you're ordering a service kit for the fuel tap, .... i got mine from M&P, and although i've always been happy with their stuff, it took 3 attempts to get the right kit.
the pic on their website looks like the right one, but bears no resemblance to whats in their stores.... speak to a human, they rang up their supplier while i was on the phone and identified the right part. and i did get credit for the wrong ones, just a pain in the arse and a waste of 2 weeks. of course, i don't have the correct part number ... bunged the packet away.... what a plonker!