1996-2002 Kawasaki 1100ZXi Jet Ski Factory Service Manual., Page 89Get this manual
7-10 ENGINE BOTTOM END Crankshaft Maintenance
The crankshaft changes the reciprocating motion the piston into rotating motion to drive the jet pump Crankshaft trouble, such as excessive play or runout, will multiply the stress caused by the intermtttent force on the piston and will result in not only rapid crankshaft bearing wear, but also noise, power loss, vibration, and shortened engine lifeA defective crankshaft should always be detected at an early stage and repaired immediatelyThe following explanation concerns the most common crankshaft problems and the method for measuring play, runout, and con-rod alignment It does not cover crankshaft disassembly because of the highly specialized equipment that srequiredIf crankshaft components become damaged or worn, the entire crankshaft should be replaced as an assembly, or rebuilt by properly equipped shop
Connecting Rod Bendf Twist
0Set the crankshaft in an alignment jig or in blocks on surface plate 0Select an arbor of the same diameter as the connecting rod small end and at least 100 mrn long, and insert the arbor through the connecting rod smatt endOWith the connecting rod held vertically, use height gauge to measure the difference in the height of the arbor above the surface plate over OOmm lengtlh to determine the amount of connecting rod bendif connecting rod bend exceeds the service limit, the connecting rod or crankshaft must be replaced