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

Check for uneven groove wear by inspecting the ring seating.

The rings should fit perfectly parallel to groove surfaces.

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

With the piston rings in their grooves, make several measurements with a thickness gauge [A] to determine piston ring/groove clearance.

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:

Thermostat Removal
Remove: Fuel Tank (see Fuel Tank Removal in the Fuel System (DFI) chapter) Air Cleaner Housing (see Air Cleaner Housing Removal in the Fuel System (DFI) chapter) Throttle Body Assy (see Throttle Body Assy Removal in the Fuel System (DFI) chapter) Throttle Body Assy Holder Clamp [A] ...

Tire Air Pressure Inspection
Remove the air valve cap. Measure the tire air pressure with an air pressure gauge [A] when the tires are cold (that is, when the motorcycle has not been ridden more than a mile during the past 3 hours). Install the air valve cap. Adjust the tire air pressure according to the specifi ...

Oxygen Sensor Heater Power Source Voltage Inspection
NOTE Be sure the battery is fully charged. Turn the ignition switch to OFF. Remove the fuel tank (see Fuel Tank Removal in the Fuel System (DFI) chapter). Disconnect the oxygen sensor lead connector and connect the measuring adapter [A] between these connectors as shown in the fig ...