Honda SH300 2006 Manual page 391

Place a shop towel over the piston.
Position the caliper body with the piston down and
Do not use high
apply small squirts of air pressure to the fluid inlet
pressure air or bring
to remove the piston.
the nozzle too close
the inlet.
Push the dust seal and piston seal in and lift them
Be careful not to
out.
damage the piston
sliding surface.
Clean the seal grooves, caliper cylinder and piston
with clean brake fluid.
INSPECTION
Check the caliper cylinder for scoring, scratches or
damage.
Measure the caliper cylinder I.D.
SERVICE LIMIT: 38.24 mm (1.506 in)
Check the caliper piston for scoring, scratches or
damage.
Measure the caliper cylinder piston O.D.
SERVICE LIMIT: 38.09 mm (1.500 in)
HYDRAULIC BRAKE
PISTON SEAL
DUST SEAL
17-33