Nicked pistons? Home › Forum › Bike Forum › Nicked pistons? Viewing 1 post (of 1 total) Nicked pistons? mattjgSubscriber I took my X2s apart as they weren’t working well, one of the pistons has a nick a couple mm high out of the base (calliper end not pad end) so that could explain the sponginess. Apart from at fitting, how could that happen? And where’s the material gone? Posted 4 years ago Viewing 1 post (of 1 total) The topic ‘Nicked pistons?’ is closed to new replies.