I tried the Screaming Eagle CV springs. Unfortunately they were the wrong diametre and length. I seem to remember someone using Kawasaki springs...
Edit: Found it! Boof on Delphi posted this long ago:
Quote:
I managed to find out some more about the lighter carb springs,they are from a FZR1000 and you just cut them to the same length as the ones you removed from the TBA carby.
..and it was from a Yamaha ;-)