WHOOP! there it is! You know, ahem, I've been wondering (my mind wanders into all sorts of trouble, but nonetheless!) perhaps the appeal of the FCR and its ilk is the relative ease of extracting performance in comparsion to the BST. Note that extracting was carefully chosen word. Perhaps it is easier for those who are less skilled at tuning to extract more performance from a FCR, which has more inate ability in this regard, than a BST, which may require more fine-tuning for equivalent perfomance. Put simply: a hack tuning an FCR is going to get more throttle-smack than a hack tuning a BST. (cut to the chase) So the question remains how much better is an FCR than a BST? And for those who care, is it $500+ mo'betta? I propose this: someone send their kitted Keihin FCR to creeper (in good shape mind you) so that he can set it up to the best of his ability and compare it to his own BST on his very own bike. That should allow for a valid comparison IMhO and provide this discussion with the eulogy it never deserved. Oh yeah, I believe he would like a FCR39... I say this because he just might do the comparison if he gets to keep the carb. PS - I too would probably be able to extract more performance from a FCR than a BST, so don't think I am feeling all high and mighty.