Had the new chain and sprockets fitted yesterday. The bike has done 22000 miles and they where the original set, mechanic says front sprocket was in very bad condition even though the rear was ok. The chain to was well worn out.The new DID ZVMX gold chain looks very smart and I think on the short ride home the bike did sound quieter than the trip to the mechanics. I was listening out for noise on both trips.I wonder if this chain will stretch very much? I will check after a few rides .Now the big question,chain lube, my mechanic says do not use wax, dry lube or grease, any good quality chain lube is ok but must be applied straight after a good ride so the chain is warm, which I always do any way.I asked him about using WD40 as I have read a lot of people use it. He says it is great for cleaning but he thinks it will not stay on the chain and not to bother with it.I have been using WD40 no fling chain lube since I had the bike, what are you using?