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I have a pair of I think z900 or could be z1000 brake calipers front mounting on to forks, Not sure what model they are off but I need 2 new pistons as the originals are wasted. The orignal pistons seem to measure 42.8mm anyone know what models had that size pistons? The bike is a right mix of bits from different year models so the chasis numbers don't help as I think the frame is off a z1000G.

www.brakecrafters.com/

If you know the year of your calipers you should be able to order pistons. A photo would help.

Just some caliper piston and model chart. (Höhe = high or length of the piston)

Yeah I don't know what year, will try a photo

Great