1987-2004 Kawasaki Mojave KSF250 Service Manual, Page 147Get this manual
11-12 BRAKES Front Master Cylinder
Front and Rear Master Cylinder Assembly Notes -Before assembly, clean all parts including the master cylinder with brake fluid or alcohol
o Except for the disc pads and disc; use only disc brake fluid, isopropyl alcohol, or ethyl alcohol, for cleaning brake partsDo not use any other fluid for cleaning these partsGasoline, engine oil, or any other petroleum distillate will cause deterioration of the rubber partsOil spilled on any part will be difficult to wash off completely, and will eventually deteriorate the rubber used in the disc brake
1Spring 2Primary Cup 3Piston
4Secondary Cup 5Dust Seal 6Stopper
Take care not to scratch the piston or the inner wall of the cylinder-Apply brake fluid to the parts removed and to the inner wall of the cylinder-When assembling the master cylinder parts, follow the exploded view illustrations