Thanks for the comments, Neil. I've had these calipers lying around for some years and a friend has fully stripped and refurbished them for me in return for a favour, so I wanted to try them on the GS. Virtually zero cost but an interesting project, IYSWIM.
Back to my original question, does anyone have the specs/dimensions for this (or a set of brackets for sale would be an unbelievable bonus ��

- 90mm caliper mounts being fitted to the 110mm GS mounts?
Alternatively, if I design them, does anyone know someone who could fabricate them?
Thanks for your help, gents.
QUOTE=Neil W;4372104]I have them on my Katana and despite being fully rebuilt with new seals , pistons ,new EBC Pro lite discs and EBC HH pads and matched to the correct bore brake master cylinder (the standard GS one will not be up to it) they are not a patch on the Nissin 4 pots that I also have when matched up to the same master cylinder and using the same discs and spec of pads .
If you manage to fit the Tokicos they give a very dead feel to the brakes and not a huge amount of stopping power.
The Nissin 4 pots are better than the standard Brembo's on my old 1150, and the bmw prakes on my old 2011 r1200gsa and easily on par with the Radial calipers on my r1200 gsa WC.
The only 6 pot calipers that are worth fitting are the Nissin ones[/QUOTE]