Rebuilding a caliper from a Birel kart. This is a 125X4, 4 piston with 4 pads. Each piston has a magnet to retain the pad. I cleaned them in an ultrasonic cleaner with water and degreaser. One broke while cleaning and 2 more broke when the snapped together after cleaning. I’ve never seen anything so fragile. No big deal till I found out they are $16 each, WTH!
Could the ultrasonic cleaner have done this?