Kawasaki STX-15F service manual 92139-3709

ENGINE BOTTOM END 8-23

Crankshaft and Connecting Rods

If any crankpin has worn past the service limit, replace the crankshaft with a new one.

If the measured crankpin diameters are not less than the service limit, but do not coincide with the original diameter markings on the crankshaft, make new marks on it.

Crankpin Diameter Marks

None 38.984 ∼ 38.992 mm (1.5348 ∼ 1.5351 in.)

○38.993 ∼ 39.000 mm (1.5352 ∼ 1.5354 in.)

∆: Crankpin Diameter Marks, “○” mark or no mark.

•Measure the connecting rod big end bore diameter, and mark each connecting rod big end in accordance with the bore diameter.

Big End Cap [A] Connecting Rod [B]

Weight Mark [C]: A letter of the alphabet

Bore Diameter Mark (Around Weight Mark) [D]: “○” or no mark.

NOTE

○Tighten the connecting rod big end nuts to the specified torque (see Connecting Rod Installation).

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

Connecting Rod Big End Bore Diameter Marks

None 42.000 mm ∼ 42.008 mm (1.6535 ∼ 1.65386 in.)

○42.009 ∼ 42.016 mm (1.65389 ∼ 1.6542 in.)

•Select the proper bearing insert in accordance with the combination coding of the connecting rod and crankshaft.

•Install the new inserts in the connecting rod and check insert/crankpin clearance with the plastigage.

Con-rod Big End	Crankpin	Bearing Insert
Bore Diameter	Diameter
		Size Color	Part Number
Marking	Marking
None	○	Brown	92139-3710
None	None	Black	92139-3709
○	○
○	None	Blue	92139-3708