Hmm, interesting, I think I missed the significance of that TSB. My clutch is like Pyndon's old one, with the steel strap round it. I've got the bike apart currently, I'd better measure that strap and see if I have the 1mm or 0.8mm version. Although my clutch basket is getting pretty worn on the splines anyway, where the plates have notched the alloy. I was thinking of getting a new one for that reasons ... but they're about £400, right Pyndon? Cheaper than a self destructing engine though, I suppose!