Rear caliper piston advice (r1100gs)

[Riz Sauvage]

Hi all.

I've just ordered the seals for the rear brembo on my gs, and motobins tell me that BM don't supply them with pistons for the caliper.. buy a caliper, they say.

Surely someone must make aftermarket s/s pistons, or non oem pistons for the caliper....?

Can anyone point me in the right direction?

Thanks,
Si

 

[NeilDD]

Si,
When you do the stripdown, measure up the size of the pistons, and give Phil or Spike a call at Cambridge Motorcycles (01223 360176, or 01223 560176) and they should be able to help you out

Cheers
Neil

 

[Stewart H]

I thought it was the other way round and that you cannot buy the seals alone

Stewart

 

[Riz Sauvage]

Thanks Neil.
No Stewart, motobins say BMW dont give them the pistons seperately for the rear..
How daft is that?

 

[D6]

any machine shop shop could make pistons

 

[Stewart H]

I have an assortment of pistons in my box of bits, can you give me the diameter of the ones you need ?
Stewart

 

[rockchunk]

any machine shop shop could make pistons

+ 1 to that not a big job to make ally ones

 

[Riz Sauvage]

How will ally hold up against fluid?
I'm tempted, as I have a lathe, and some ally bar.

 

[rockchunk]

How will ally hold up against fluid?
I'm tempted, as I have a lathe, and some ally bar.

my mate made me some for my track bike no problems with them

 

[cookie]

How will ally hold up against fluid?
I'm tempted, as I have a lathe, and some ally bar.

won't hold up too well against salt, i'd have thought.

brembo pistons used to be hard chromed steel, later they seemed to use some kind of ali, but it was teflon coated.

 

[Riz Sauvage]

Stewart,
It comes in at 27.92 mm on the vernier.

Si

 

[Riz Sauvage]

Ta Cookie.. yeah, I was forgetting the pad side.. The ali wil deteriorate..

 

[Stewart H]

Just in from the garage, all of the spare pistons I have are fronts
Just how bad are yours?
Stewart

 

[Riz Sauvage]

Thanks for looking Stewart.
It's really only that one, that has a couple of "dents" in the side, I guess someone was over exuberant with some pliers.
Seeings as I intend fitting new seals, I wanted to avoid them getting messed up by a dodgy cyl.