No great hurry…my original pistons, although marked with slight corrosion are still quite serviceable…and currently on the bike after fitting a new kit to the caliper. But I do like the stainless idea.
Smithy.
Hello again I’ve just purchased a seal kit for the front pistons. I can’t seem to find a rear seal kit for the R Any ideas any one 
I use two sets of these from eBay,item no.132621961550 and if you need the joint seal CMSNL have them in stock or eBay item no.266907786170
Regards Bif
Hi, thanks again Bif 
Hi Unfortunately, that first number for the seals is not coming up I might have to put the old seals back in… they look okay. Is that advisable with those new pistons you’re gonna send? Sean