[Ellz10]

They look more like cups to me, but I assume these are the pins in the caliper?

I'm simply curious if these should be replaced upon removal, like the o-rings in each compartment, or if they can be reused?

 

[BillV]

I don't understand your terminology. The pins retain the pads in the caliper. I don't see any in your pic. The pistons translate hydraulic pressure into force against the pads. That's what I see. There ought to be two seals per piston. The outermost is a dust seal to keep crap away from the piston and inner seal, which is the piston's hydraulic seal. I'm not sure but your pic seems to show the piston seals.

Pins don't need to be replaced unless they're worn or corroded. Mine thread into the caliper body and can seize in place. A small amount of antiseize will help. Then use some thread lock to make sure they stay in place. It's prudent to periodically clean any crap from the pistons. If excessive, a more thorough cleaning could be done by removing the pistons. At that point, it's prudent to replace the seals. Replace the pistons if their surfaces have any damage.

 

[Ellz10]

I don't understand your terminology. The pins retain the pads in the caliper. I don't see any in your pic. The pistons translate hydraulic pressure into force against the pads. That's what I see. There ought to be two seals per piston. The outermost is a dust seal to keep crap away from the piston and inner seal, which is the piston's hydraulic seal. I'm not sure but your pic seems to show the piston seals.

Pins don't need to be replaced unless they're worn or corroded. Mine thread into the caliper body and can seize in place. A small amount of antiseize will help. Then use some thread lock to make sure they stay in place. It's prudent to periodically clean any crap from the pistons. If excessive, a more thorough cleaning could be done by removing the pistons. At that point, it's prudent to replace the seals. Replace the pistons if their surfaces have any damage.

So I've circled what is relevant I believe. Where I've circled are the "pins" and around the pins are the "seals" of which there are 2 per pin as you stated. What I don't see or understand what you're referring to is the piston..is it perhaps the part I circled in the second picture?

 

[craigfer63]

Brembo Caliper.

2011 Suzuki GSX-R600L1 Front Caliper | Ron Ayers

Shop online for OEM Front Caliper parts that fit your 2011 Suzuki GSX-R600L1, search all our OEM Parts or call at 252-758-3084

www.ronayers.com

Older, Tokico caliper, with Pad Retainer Pins.

2006 Suzuki GSX-R600 Front Caliper | Ron Ayers

Shop online for OEM Front Caliper parts that fit your 2006 Suzuki GSX-R600, search all our OEM Parts or call at 252-758-3084

www.ronayers.com

 

[TurboGuido]

So I've circled what is relevant I believe. Where I've circled are the "pins" and around the pins are the "seals" of which there are 2 per pin as you stated. What I don't see or understand what you're referring to is the piston..is it perhaps the part I circled in the second picture?

What you call pins are the pistons in the calipers. BillV already answered all of your questions but to be short, no you do not need to replace the pistons unless they are damaged. Its always a good idea to replace the seals (o-rings) while youre at it but if they look good you could probably get away with reusing them. Be sure to check and clean the slots in the calipers where the seals will be, if there is dirt or oxidation it can push the seal out into the piston and cause sticking brakes.

 

[TwistedMister]

fookin ROOBY DOOO!

 

[BillV]

The part that you've circled is the rubber cap that fits over the bleeder. For unknown reasons Brembo located it where it points inward, thereby making bleeding much harder. I see lots of road grit on the pistons and the caliper body in the vicinity of the pistons. It's time for a cleaning and probably new seals. I couldn't tell from your first pic but, as Craig points out, it's now clear that they're Brembos and they use retaining clips instead of pins.