A
almarconi
Guest
Sounds like something is wrong. Not that I'm an expert or anything, but I've done the calipers on about half a dozen bikes and I've never experienced what you are saying. Did you lube the piston and seals with brake fluid before you installed the piston?
I lubed the piston and seals with brake fluid. Maybe the tolerance on some pistons and caliper bores are not as tight. I could start the piston by hand but could not push the piston to the bottom of the bore. I rebuilt both the front calipers and the rear one and all were the same. If the seal was not in the bore you could put the piston in but as soon as the seal was installed it was impossible to push them in by hand. After the calipers were put on the bike they worked fine.