Final answer:
Most motorcycles have 5 or 6 gears to control speed and power output of the engine.
Step-by-step explanation:
Most motorcycles have 5 or 6 gears. The number of gears can vary depending on the specific make and model of the motorcycle. Gears are used to control the speed and power output of the engine. Each gear provides a different gear ratio, allowing the rider to choose the right combination of speed and power for different riding conditions.