Kawasaki Ninja Service Manual: Piston Ring, Piston Ring Groove Wear Inspection

Kawasaki Ninja Service Manual / Crankshaft/Transmission / Pistons / Piston Ring, Piston Ring Groove Wear Inspection

The rings should fit perfectly parallel to groove surfaces.

If not, replace the piston and all the piston rings.

Piston Ring, Piston Ring Groove Wear Inspection


Piston Ring/Groove Clearance Standard:

Top 0.03 0.07 mm (0.0012
0.0028 in.)


Second 0.03 0.06 mm (0.0012
0.0024 in.)


Service Limit:

Top 0.17 mm (0.0067 in.)

Second 0.16 mm (0.0063 in.)

Piston Wear Inspection
Measure the outside diameter [A] of each piston 5 mm (0.20 in.) [B] up from the bottom of the piston at a right angle to the direction of the piston pin. If the measurement is under service ...

Piston Ring Groove Width Inspection
Measure the piston ring groove width. Use a vernier caliper at several points around the piston. Piston Ring Groove Width Standard: Top [A] 0.82 0.84 mm (0.0323 0.0331 in.) Second [B] 0.8 ...

Other materials:

Steering Stem Warp Inspection
Whenever the steering stem is removed, or if the steering can not be adjusted for smooth action, check the steering stem for straightness. If the steering stem [A] is bent, replace the steering stem. Stem Cap Deterioration, Damage Inspection Replace the stem cap if its oil seal [A] s ...

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 Assembly Bolts [A] Split the front caliper. Remove: Pad Spring O-ring [A] U ...

Front, Rear Wheel Rotation Difference Abnormal Inspection (Service Code b 25)
Check the following and correct the faulty part. Incorrect Tire Pressure Tires not recommended for the motorcycle were installed (incorrect tire size). Deformation of Wheel or Tire Missing Teeth or Clogging with Foreign Matter of Sensor Rotor (see Wheel Rotation Sensor Rotor Inspe ...