Broken pottery - Shimano brake pistons

[Max Headroom]

Had the same issue - I broke the XT caliper Piston while trying to force it back with large flat screwdriver.

 

I rebuilt about a third of the piston with Prattleys Putty - then sanded and made to fit.

Rode trails with it for about six months and worked perfectly -  before I bought a new lever/caliper set (after breaking the lever in a OTB fall.)

 

At the time I tried to source a Piston but only found these (below) from XTR I think.

 

If anyone can use them, let me know. (size 20.6 x 8.6  on my shitty plastic caliper)

NOTE L22 and L23 marking inside