Practice question

What is the main function of the crankshaft in a motorcycle engine?

To convert the piston's up-and-down motion into rotary motion that can drive the transmission
To store fuel before it enters the carburettor
To generate the spark that ignites the air-fuel mixture
To filter air before it enters the engine

Answer: A — To convert the piston's up-and-down motion into rotary motion that can drive the transmission

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