Caliper seals.

TexasKZ wrote: Take measurements of your pistons, diameter, height, location and dimensions of the seal groove, then ask board members here or at a GS site to measure pistons from a similar year GS 750/850/1000.
I say this because Kawasaki, Suzuki, Yamaha and Honda often bought sub assemblies from the same vendors. Sometimes identical, and sometimes with minor changes. If these pistons are interchangeable, you can get new oem Suzuki piston and both seals as a set from Partzilla for $25.
I ran into this when I recently rebuilt the front calipers on my ZRX. They are the same calipers as used on the Hyabusa, except Suzuki specified light weight aluminum pistons instead of steel, and Suzuki sells the pistons and seals at a fraction of what Kawasaki wants. Identical dimensions, lighter weight, much cheaper. Win.

Davey b wrote: Yeah thanks all again. To clarify, on rebuild do I push the seal into the bore groove, then push the piston in all the way down , then fit the dust boot ? Sorry to appear dim but I wanna get it right and do it as easy as possible.
Just a side note, earlier I mentioned the mystical metal ring on the dust boot ? There isnt one on these calipers, just another groove to seat it in. Gonna be a right pain in the arse I think !!