In most motorcycles, the engine connects to the rear wheel through a transmission system. The transmission transfers power from the engine to the rear wheel, allowing the motorcycle to move.
Here's a general overview of the connection between the motorcycle engine and the rear wheel:
Clutch: The engine is connected to the transmission via a clutch system. The clutch allows the rider to engage or disengage the engine's power from the transmission. When the clutch lever is pulled, the clutch plates separate, disengaging the power flow.
Transmission: The transmission is a gearbox that consists of multiple gears. It is usually located beneath the engine. The transmission enables the rider to select different gear ratios, allowing the engine's power to be transmitted to the rear wheel at different speeds and torque levels.
Output Shaft: Inside the transmission, the power from the engine is transferred to an output shaft. The output shaft runs parallel to the motorcycle's frame and extends to the rear wheel.
Drivetrain: The power from the output shaft is then transmitted to the rear wheel through the drivetrain. The drivetrain typically consists of a chain, belt, or shaft drive system, depending on the motorcycle's design.
Chain Drive: A chain drive system uses a sprocket on the output shaft and a sprocket on the rear wheel. The power is transferred from the output shaft sprocket to the rear wheel sprocket through a roller chain.
Belt Drive: Some motorcycles use a belt drive system. A belt connects the output shaft pulley to the rear wheel pulley, transmitting power from the engine to the rear wheel.
Shaft Drive: Shaft drive systems use a drive shaft and bevel gears to transfer power from the output shaft to the rear wheel. The drive shaft is enclosed in a housing that contains lubricating oil.
Rear Wheel: The rear wheel is connected to the drivetrain and receives power from the engine through the transmission system. As the power is transmitted, the rear wheel rotates, propelling the motorcycle forward.
It's important to note that different motorcycle models may have variations in their drivetrain systems. Some motorcycles, particularly smaller or off-road bikes, may have direct chain drive without a transmission, while others may have different types of transmissions or drivetrain configurations.