Kawasaki Ninja Service Manual: Piston Ring Thickness Inspection

Kawasaki Ninja Service Manual / Crankshaft/Transmission / Pistons / Piston Ring Thickness Inspection

Use the micrometer to measure at several points around the ring.

Piston Ring Thickness Standard:

Top [A] 0.77 0.79 mm (0.0303
0.0311 in.)


Second [B] 0.78 0.79 mm
(0.0307 0.0311 in.)


Service Limit:

Top 0.70 mm (0.0276 in.)

Second 0.71 mm (0.0280 in.)

Piston Ring Thickness Inspection


If any of the measurements is less than the service limit on either of the rings, replace all the rings.

NOTE

When using new rings in a used piston, check for uneven groove wear. The rings should fit perfectly parallel to the groove sides. If not, replace the piston.

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 ...

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. ...

Other materials:

Seat Cover Removal
Remove: Rear Seat (see Rear Seat Removal) Remove the bolts [A]. Remove the upper seat cover backward [B] to clear the hook portions. Remove: Front Seat (see Front Seat Removal) Quick Rivets [A] Bolts [B] Seat Covers [C] ...

Brake Disc Warp Inspection
Raise the wheel off the ground with the jack. Special Tools - Jack: 57001-1238 Jack Attachment: 57001-1608 For front disc inspection, turn the handlebar fully to one side. Set up a dial gauge against the disc [A] as shown in the figure and measure disc runout, while turning [B] the ...

Tightening Sequence
Generally, when installing a part with several bolts, nuts, or screws, start them all in their holes and tighten them to a snug fit. Then tighten them according to the specified sequence to prevent case warpage or deformation which can lead to malfunction. Conversely when loosening the bolts, n ...