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Preparation Information
Function of Crankshaft:
It can change the reciprocating motion of piston into rotary motion, generate torque and drive the valve mechanism and
other auxiliary mechanisms simultaneously, and it is the installation carrier and power source of timing sprocket, drive gear,
bearing, crank pin and other parts. From the appearance, we can see that the crankshaft is composed of crankshaft and
connecting rod and this motorcycle adopts the assembled crankshaft which is mainly composed of crank, connecting rod,
crank pin and needle bearing. Its crank pin is pressed into the crank wall with an interference fit. At the same time, the big
ends of two rods pass through the crank pin. The crank is round and the thickness of the crank part facing to the crank wall
is larger, which is used to balance the inertial force generated by the rotation of crankshaft. If the engine is overloaded for a
long time or operated long, there will be wear and deformation. The maintenance methods of crankshaft connecting rod
group are introduced below.
5-34
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Troubleshooting
