Kawasaki Ninja Service Manual: Caliper Fluid Seal Damage

Kawasaki Ninja Service Manual / Brakes / Calipers / Caliper Fluid Seal Damage

The fluid seal (piston seal) [A] is placed around the piston to maintain clearance between the pad and the disc. If the seal is in a poor condition, it could lead the pad to wear excessively or the brake to drag, which may cause the temperature of the discs or the brake fluid to increase.

Caliper Fluid Seal Damage


Brake fluid leakage around the pad.

Brakes overheat.

Considerable difference in inner and outer pad wear.

Seal and piston are stuck together.

If the fluid seal is replaced, replace the dust seal [B] as well. Also, replace all seals every other time the pads are changed.

Front Caliper [C] Rear Caliper [D]

Caliper Fluid Seal Damage


Caliper Installation
Install the caliper and brake hose lower end. For the front caliper, be sure to install the collars [A]. Replace the washers on each side of hose fitting with new ones. Touch the brake ho ...

Rear Caliper Dust Boot and Friction Boot Damage
Check that the dust boot [A] and friction boot [B] are not cracked, worn, swollen, or otherwise damaged. If they show any damage, replace it. ...

Other materials:

Serial number locations
The engine and frame serial numbers are used to register the motorcycle. They are the only means of identifying your particular machine from others of the same model type. These serial numbers may be needed by your dealer when ordering parts. In the event of theft, the investigating authoriti ...

Valve Guide Removal
Remove: Valve (see Valve Removal) Oil Seal Spring Seat Heat the area around the valve guide to 120 150°C (248 302°F), and hammer lightly on the valve guide arbor [A] to remove the guide from the top of the head. NOTICE Do not heat the cylinder head with a torch. This ...

Starter Clutch Installation
Replace the O-ring [A] with a new one and apply grease. Apply molybdenum disulfide grease to the starter clutch shaft [B]. Install: Starter Clutch [C] Spacer (Small Diameter) [D] Spacer (Large Diameter) [E] Starter Clutch Shaft Starter Clutch Shaft Holder [F] Turn the O-ring si ...