Right, I have been faffing about looking for the right set of ITBs, I think Im looking for a set of 42mm ITBs, that can be split, or for that matter be adapted to fit a stock ST170 manifold,
Bike companies seem to change their specs more often than I change my socks, WHAT am I looking for and from what year etc

Hi
I used Suzuki GSXR 600 K1 bodies which are all individual.
These were re-spaced, but you will need bushes/spacers etc made. and will need a new fuel rail made.
I had access to a hobby milling machine and lathe, which helped alot.

I think from memory the GSXR 600 bodies are 38mm, but the GSXR750 and GSXR1000 are near your size requirement, and are still individual types.

You can use Suzuki gsxr1000 k1 or k2. (Personal experience)

Early Hayabusa will also fit the ST170 manifold and can be split.