Brake Caliper Seals

[marcmiller001]

Not to highjack the thread, but I have heard a lot of issues with ATE expense. My entire brake rebuild for 2 calipers including pads was around $100 and the only issue was ordering the o-rings between the split halves separately from motobins for $14 (shipping was 80%). I got everything else through BMW of Countryside in Chicago. Those guys have been awesome help throughout my complete rebuild of the r65ls

[Tony Smith]

Marc

The only issue is that ATE  used chrome plated mild steel for the pistons (Brembo have nearly always used anodised aluminium).

The plating on the ATE piston wears, rusts starts and that is where the problem lays. You can polish the crap out of them and put them back in, but as Neil Young said "rust never sleeps" and all you have done is postpone the problem to another day. Making stainless steel or alloy pistons is the cure, but if you have to pay for that it is quite simply cheaper to just buy Brembo calipers. OTHO if you have access to a lathe, making new pistons is a very easy job.

[marcmiller001]

Ahhh. Great point Tony. I get that. Could be an upgrade down the line then... as brake caliper rebuilds I don't consider a "fun" job... though rebuilding the bike myself has been rewarding so far.