Hi Jamie
Well for the brakes on my Kat I did rather cheat a bit and sent them to Past Parts in Suffolk, this was due to in some part my own "Muppetry" with the front master cylinder.
http://www.pastparts.co.uk/index.php?ro ... ation_id=8
They did a pretty good job with the refurb including replacing the sight glass that was particularly deformed and opaque. Five years on and all is still good.
Suzuki still list the "Piston and Cup Set" for the SZ/SD I am guessing that they were fairly faithful to the original design for the SAE/SBE models.
I have also heard that Powerhouse are good but I think they only do caliper kits.
https://www.powerhouse.uk/content/motor ... rvices.php
Might be worth giving them a call.
Carbs are a bit of a grey area, I will have a look to see if I have any manuals in pdf form with me as I am at work at moment.
Carb spares (jets, float valves, gaskets and O rings) are available from a couple of places; NRP
http://www.nrp-carbs.co.uk/
Allensperformance
http://www.allensperformance.co.uk/
Hmmm got to go to work! Hope this helps