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:

External Shift Mechanism Inspection
Examine the shift shaft [A] for any damage. If the shaft is bent, straighten or replace it. If the serration [B] are damaged, replace the shaft. If the spring [C] is damaged in any way, replace it. If the shift mechanism arm [D] is damaged in any way, replace the shaft. Check the s ...

Rear Fender Front Removal
Remove: Flap and Rear Fender Rear (see Flap and Rear Fender Rear Removal) Fuel Tank (see Fuel Tank Removal in the Fuel System (DFI) chapter) Battery (see Battery Removal in the Electrical System chapter) Exhaust Butterfly Valve Actuator (see Exhaust Butterfly Valve Actuator Remova ...

Balancer Assemble
Apply molybdenum disulfide oil solution to the ribs of the balancer [A]. Apply molybdenum disulfide oil solution to the ribs of the balancer gear [A]. Check that the rubber dampers [B] are in place. Face the linked portion [C] to the bottom. Assemble the balancer weight ...