| Motorcycle Brake Caliper Piston Seals Motorcycle Brake Caliper Piston Seals Listed by Dimensions. Sizes shown represent the OD of piston or ID of the seal. These OEM quality piston seal kits are manufactured in Japan. Each kit consists of the necessary seals for one piston. Back in the day calipers were not intended to be dismantled but calipers can be split and successfully reassembled. Splitting the caliper makes it much easier to change the pistons, or clean the bores and seal grooves and to replace the oil & dust seals. The o-ring seals that sit between the caliper halves are now available and are listed by size and by manufacturer of motorcycle. If you have a Jap bike & cannot find your part on this or one of the following pages, we may have neglected to add it here or have just not yet found the time to update the category. Select your bike model from the Japanese categories to the left of this page. We also have parts for other manufacturers which you will find in the parts by type categories |