1989 Honda FL400R Pilot Service Manual, Page 192Get this manual
BRAKES Measure the master cylinder piston 0.0
SERVICE LIMIT: 12.645 mm (0.4978 in)
ASSEMBLY
The master cylinder piston, cups and spring must be re-
placed as setDip the piston cups in clean brake fluid before assemblyInstall the spring and the master cylinder piston with cups
CAUTIONhen Instal! the
the cups, do not alOlt' the with its tapered end