TBH, not that I know of, seems a bit weedy to me sort of chain you would run on a pit bike, of course the big issue is getting the sprockets for that size of chain to fit the bike. you could look at the EN models they run a rubber belt and alloy sprockets. but the weight saving of a lighter chain wouldn't be that great given there are plenty of other measures that would lose far more. but as the saying goes it's your bike. if you want to have go there is nothing stopping you.