2. Pull the piston out of the caliper. Do not grab it with pliers - you will scratch the metal. Follow this procedure:
- a. Place a narrow block of wood or some rags opposite the piston but inside the caliper jaw.
- b. Inject a certain amount of compressed air - no more than 200 kPa - into the brake system pipe channel. Be careful of your fingers: let the piston push out the wooden stopper.
3. Remove the piston, boot and seal.
4. Clean the piston and bore with clean brake fluid. Inspect the surfaces very carefully; they must be absolutely smooth. Any scratch or rust is grounds for replacement. Very light surface rust can be removed with very fine abrasive paper soaked in brake fluid, but any pitting requires replacement.
To install:
5. Apply brake cylinder grease to the new piston seal and install the seal into the cylinder groove.
6. Place the cover on the piston.
7. Lubricate the caliper bore and piston with clean brake fluid. Install the piston into the bore, solid end first. This is a labor-intensive operation due to the very high precision required; keep the piston straight in the hole. Be patient.
8. Make sure the piston boot is placed on the edges around the caliper bore. Push the piston all the way in and the caliper will fit easily onto the brake pads.
9. Install the caliper. Fill the reservoir as needed and bleed the brake system.
(The original can be found on the resource: HondaBook.ru)