FYI - I swapped by Hayabusa shock from my B6 (sold) to B12. Had the sag set to ~1.5 inches at the rear on the B6 - when I put it in the B12, noticed the B12 was very slow to steer (I had already set the front sag on the forks) - checked the sag, it was ~3 inches. Not sure why (maybe a bit more weight...but can't believe that much)..different geometry? Anyway, just be aware if you ever make the same swap - you will need to reset the sag (once I set it to 1.5 inches, the B12 turn in was much more responsive).
Jay