... anyone know of any rebuild kits or new seals for the st170 callipers??

Thanks

 

There is a company called Bigg Red based in Worcester that do complete brake refurbishments and supply repair kits and pistons.

I bought a used set of ST170 calipers on eBay and sent them to Big Redd for a complete refurb and polymer coating in red .

Here is their website: http://biggred.co.uk/