Hi Dan, you can do it on the bike with the lever but it's messy as the oil spills out...
I prefer draining and cleaning everything and use compressed air to pop the piston out. Need to be careful with this and do one by one. Pop one out (the one that comes out first) clean replace that one and then replace and hold it in with your hand and reaply the compressed air and another one should pop out... And so on, you get the drift. if you get two opposite each other hold them in with a wooden handle or so.
Just be careful when they are jammed as the compressed air make them come out in a hurry when they let go.

not sure how you will go buying seal kits, they're very scarce as brembo don't want people doing rebuilding their own brakes for "safety reasons".
yoyodyne sell brembo seal kits for clutch components but you have to send them your calipers for repair.


paul.

Easy to buy, there are part numbers in the chassis manual.

KTMGuy, Yeah I see how you could pop them out with the lever, however like you say that does sound messy and I dont have compressed air or access too.

Do you think as im changing the pistons too they will pull out with pliers? it wont matter if I damage them?

Thanks

The KTM guy said they did bind and my last set did 6k easy still did it, weather that was just an excuse because I bought the pads from them who knows.

Turns out fairly simple to remove the pistons.

Pulled the lever to pop the pistons out half way bit, then removed the brake lines and undid the three hex bolts.

The brakes then come apart in two sections and the pistons came out with out much drama. Gave em a bit of a clean.

Just awaiting my exhaust to be fixed and my new pistons and seals to arrive.

There are two seals on each piston will see if its both you get or just the top.

Just remember tho Dan, when you refill brake lines its BRAKE FLUID! not clutch oil

But blue magura blood looks so much more pretty....

Changed the seals, made next to no difference to the slight stiction of the pads on disc, oh well. Its very easy to do as long as your adept at changing the fluid....

Before you put the pads back in, did you check the action of the pistons? Were they all moving out freely and then when releasing the brake lever did the pistons ease back in by a fraction? Did you lube the seals with brake fluid before assembly?

Yes, yes, yes but with the silicone provided witht the seals.