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:

Loading and accessories information
WARNINGIncorrect loading, improper installation or use of accessories, or modification of your motorcyclemay result in an unsafe riding condition. Before you ride the motorcycle, make sure it is not overloaded and that you have followed these instructions. With the ...

Daily Checks
Check the following items each day before you ride. The time required is minimal, and habitual performance of these checks will help ensure you a safe, reliable ride. If any irregularities are found during these checks, refer to the Maintenance and Adjustment chapter or see your dealer fo ...

KIBS Hydraulic Unit Removal
NOTICE The KIBS hydraulic unit [A] has been adjusted and set with precision at the factory. Therefore, it should be handled carefully, never struck sharply, as with a hammer, or allowed to fall on a hard surface. Be careful not to get water or mud on the KIBS hydraulic unit. Drain the b ...