When rod bearings, pinion shaft bearings or sprocket shaft bearings are in need of repair, the engine must be removed from the motorcycle as described in "Stripping Motorcycle for Engine Repair," Section 3A. It is recommended procedure to check and make repairs to cylinder heads, cylinders and gearcase at the same time, or in other words, perform an entire engine overhaul.

Flywheel End Play Check:

Before starting crankcase disassembly, check flywheel assembly end play to determine sprocket shaft bearing wear using a dial indicator. Assemble engine sprocket and nut or compensating sprocket to sprocket shaft before taking reading to assure accurate measurement. Attach indicator securely to crankcase with indicator stem resting on end of sprocket or pinion shaft. Rotate flywheels and work all end play to one end of assembly. Adjust dial indicator, rotate flywheels and work assembly to other extreme. If play exceeds tolerance (see "Engine Specifications, replace entire sprocket bearing set.

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