Practice question

What is the function of the camshaft in a four-stroke motorcycle engine?

To open and close the intake and exhaust valves at the correct time in relation to piston movement
To ignite the air-fuel mixture at the top of the compression stroke
To store electrical charge for the starter motor
To cool the engine oil before it returns to the sump

Answer: A — To open and close the intake and exhaust valves at the correct time in relation to piston movement

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