Definitions of common parts for your Scooter or ATV

Use the definitions below to help identify the parts and their role on your ATV, Scooter, Dirt bike, or motorcycle.


Carburetor - Also known as a fuel-air mixer. The section of the engine intake system where fuel and air are mixed and passed onto the engine for combustion.

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CDI Box- Capacitive Discharge Ignition- Device designed to help the spark plug fire at a rate consistent with the RPMs of an engine.

Cylinder- The central working part of an engine. The space where the piston travels.

Piston- Located in a cylinder and made gas tight by piston rings. Its purpose is to compress the gas and air mixture.

Ignition Coil- An induction coil that converts 12 volt battery current into the high voltage current required by spark plugs.

Magneto- Essentially an alternator. This device is used in the ignition system to provide pulses of high voltage electrical power to spark plugs.

Spark Plug- An electrical device that fits into the cylinder head of an engine and ignites the gas by means of an electrical spark.

Starter- An electrical motor for starting an engine.

Voltage Regulator- An electrical regulator designed to automatically maintain a constant voltage level.

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