Kawasaki Ninja Service Manual: Connecting Rod Big End Bearing Insert/Crankpin Wear Inspection

Kawasaki Ninja Service Manual / Crankshaft/Transmission / Crankshaft and Connecting Rods / Connecting Rod Big End Bearing Insert/Crankpin Wear Inspection

Connecting Rod Big End Bearing Insert/Crankpin Wear Inspection


NOTE

Do not move the connecting rod and crankshaft during clearance measurement.

Remove the connecting rod big end again, measure each clearance between the bearing insert and crankpin [A] using plastigage (press gauge) [B].

NOTICE

After measurement, replace the connecting rod bolts and nuts.

Connecting Rod Big End Bearing Insert/Crankpin Clearance

Standard: 0.030 0.060 mm
(0.0012 0.0024 in.)


Service Limit: 0.10 mm (0.0039 in.)

If the clearance is within the standard, no bearing replacement is required.

If the clearance is between 0.061 mm (0.0024 in.) and the service limit (0.10 mm, 0.0039 in.), replace the bearing inserts [A] with inserts painted blue [B]. Check insert/ crankpin clearance with the plastigage. The clearance may exceed the standard slightly, but it must not be less than the minimum in order to avoid bearing seizure.

If the clearance exceeds the service limit, measure the diameter of the crankpins.

Connecting Rod Big End Bearing Insert/Crankpin Wear Inspection


Crankpin Diameter

Standard: 34.484 34.500 mm
(1.3576 1.3583 in.)


Service Limit: 34.47 mm (1.3571 in.)

Crankpin Diameter Marks

None 34.484 34.492 mm (1.3576
1.3580 in.)

34.493
34.500 mm (1.3580
1.3583 in.)


Connecting Rod Big End Bearing Insert/Crankpin Wear Inspection


: Crankpin Diameter Marks (“” or
No Mark)

NOTE

The mark already on the big end should almost coincide with the measurement.

Connecting Rod Big End Inside Diameter Marks

None 37.500   37.508 mm
(1.4764 1.4767 in.)


37.509
37.516 mm (1.4767
1.4770 in.)


Connecting Rod Big End Bearing Insert/Crankpin Wear Inspection


Big End Cap [A] Connecting Rod [B] Weight Mark, Alphabet [C] Diameter Mark [D] (“” or No Mark)

Connecting Rod Big End Bearing Insert/Crankpin Wear Inspection


Connecting Rod Big End Bearing Insert/Crankpin Wear Inspection


Connecting Rod Big End Side Clearance Inspection
Measure connecting rod big end side clearance. Insert a thickness gauge [A] between the big end and either crank web to determine clearance. Connecting Rod Big End Side Clearance Standard: 0. ...

Crankshaft Side Clearance Inspection
Insert a thickness gauge [A] between the thrust washer [B] on the crankcase and the crank web [C] at the #3 main journal to determine clearance. If the clearance exceeds the service limit, r ...

Other materials:

DFI Power Source
ECU Fuse Removal Refer to the 30 A Main/15 A ECU Fuse Removal in the Electrical System chapter. ECU Fuse Installation If a fuse fails during operation, inspect the DFI system to determine the cause, and then replace it with a new fuse of proper amperage. Refer to the Fuse Installation in ...

Front Wheel Installation
NOTE The direction of the wheel rotation [A] is shown by an arrow [B] on the wheel spoke. Check the wheel rotation mark on the front wheel and install it. Apply high-temperature grease to the grease seal lips. Fit the collars [A] on the both sides of the hub. The collars are i ...

Operating Procedures
Clean the seat area carefully. Coat the seat with machinist’s dye. Fit a 45° cutter into the holder and slide it into the valve guide. Press down lightly on the handle and turn it right or left. Grind the seating surface only until it is smooth. NOTICE Do not grind the seat too ...