Kawasaki Ninja Service Manual: Master Cylinder Rubber Parts Replacement

Kawasaki Ninja Service Manual / Periodic Maintenance / Periodic Maintenance Procedures / Replacement Parts / Master Cylinder Rubber Parts Replacement

Front Master Cylinder Disassembly

Remove the front master cylinder (see Front Master Cylinder Removal in the Brakes chapter).
Remove the seal cover [A], circlip [B], connector [C] and O-ring [D].

Special Tool - Inside Circlip Pliers: 57001-143

Unscrew the locknut [E] and pivot bolt [F], and remove the brake lever.
Remove the bleed valve [G] and rubber cap [H].
Remove the piston assembly [I] as follows.

Remove the dust cover and push rod.

Remove the circlip [J]

Pull out the piston (with primary cup and secondary cup).

Remove the return spring and spring guide.

Master Cylinder Rubber Parts Replacement

Replace: Seal Cover [A] Circlip [B] O-ring [D] Rubber Cap [H] Piston Assembly [I] Circlip [J] Diaphragm [K]

Rear Master Cylinder Disassembly

Remove the rear master cylinder (see Rear Master Cylinder Removal in the Brakes chapter).
Remove the circlip [A], connector [B] and O-ring [C].

Special Tool - Inside Circlip Pliers: 57001-143

Rear Master Cylinder Disassembly

Slide the dust cover [D] out of place, and remove the circlip [E].
Pull out the push rod assembly [F].
Remove the piston assembly [G] and return spring.

Master Cylinder Assembly

Before assembly, clean all parts including the master cylinder with brake fluid or alcohol.

NOTICE

Except for the disc pads and disc, use only disc brake fluid, isopropyl alcohol, or ethyl alcohol for cleaning brake parts. Do not use any other fluid for cleaning these parts. Gasoline, engine oil, or any other petroleum distillate will cause deterioration of the rubber parts. Oil spilled on any part will be difficult to wash off completely, and will eventually deteriorate the rubber used in the disc brake.

Apply brake fluid to each parts and the inner wall of the cylinder.
When installing the piston assembly, take care not to scratch the piston or the inner wall of the cylinder.
Apply silicone grease to the followings.

Front: Brake Lever Pivot Bolt

Rear: Dust Cover of Push Rod Assembly

For the front master cylinder, tighten the brake lever pivot bolt and the locknut.

Torque - Brake Lever Pivot Bolt: 1.2 N·m (0.12 kgf·m, 11 in·lb) Brake Lever Pivot Bolt Locknut: 5.9 N·m (0.60 kgf·m, 52 in·lb)

For the front master cylinder, install the bleed valve and rubber cap.

Torque - Front Master Cylinder Bleed Valve: 5.4 N·m (0.55 kgf·m, 48 in·lb)

Fit the circlip into the groove of the cylinder securely.

Brake Fluid Change

NOTE The procedure to change the front brake fluid is as follows. Changing the rear brake fluid is the same as for the front brake. Level the brake fluid reservoir. Remove: Screw [A] ...

Caliper Rubber Parts Replacement

Front Caliper Disassembly Remove: Front Caliper (see Front Caliper Removal in the Brakes chapter) Brake Pads (see Front Brake Pad Removal in the Brakes chapter) Remove: Front Caliper A ...

Other materials:

Piston Ring End Gap Inspection
Place the piston ring [A] inside the cylinder (upper crankcase), using the piston to locate the ring squarely in place. Set it close to the bottom of the cylinder, where cylinder wear is low. Measure the gap [B] between the ends of the ring with a thickness gauge. Piston Ring End Gap ...

Balance Weight Installation
Check if the weight portion has any play on the blade [A] and clip [B]. If it does, discard it. WARNINGUnbalanced wheels can create an unsafe riding condition. If the balance weight has any play on the rib of the rim, the blade and/or clip have been stretched. Replace th ...

Crankcase Splitting
Remove the engine (see Engine Removal in the Engine Removal/Installation chapter). Set the engine on a clean surface and hold the engine steady while parts are being removed. Remove: Cylinder Head (see Cylinder Head Removal in the Engine Top End chapter) Starter Motor (see Starter M ...