04-10-19, 08:56 PM
Piston on the original FZS600 caliper and the FZS1000 are the same size which is why the master cylinders are the same on both bikes. The only problem with the original FZS600 caliper was poor drainage due to small drain holes which were easily blocked by road crud. This allowed water(especially salt laden water) to collect within the caliper around the pads and corrode everything within. FZS1000 caliper had open bottom end as the pads are fitted from the bottom, hence less issue with holding water.