1985 Honda Odyssey 350 FL350R Shop Manual, Page 158Get this manual
BRAKES Remove the piston boots and circlips from the front and rear master cylinder bores
Remove the master cylinder pistons, cups and springsClean the inside of the master cylinder and reservoir with clean brake fluid
(1) REAR MASTER CYLINDER PISTON
Check the master cylinder for scores, scratches or other damageMeasure the front and rear master cylinder 1.0