Chain final-drive systems are by far the most common. In this system, a sprocket installed to the output shaft (i.e., the shaft in the transmission) is connected to a sprocket mounted on the trunk wheel of the motorcycle by a metallic chain. When the transmission turns the smaller front sprocket, power can be transmitted along the chain to the bigger rear sprocket, which then turns the rear wheel. This kind of transmission system in automobile must be lubricated and modified, and the chain stretches and the sprockets put on, requiring periodic replacements.

Belt drives
Belt drives are an alternative solution to chain drives. Early motorcycles often used leather belts, which could be tensioned to give traction using a spring-loaded pulley and hand lever. Leather-based belts often slipped, specifically in wet weather, therefore they were abandoned for various other materials and styles. By the 1980s, advances in materials made belt final-drive transmission system in automobile viable again. Today’s belts are constructed with cogged rubber and operate quite similar way as metal chains. Unlike steel chains, they don’t require lubrication or cleaning solvents.

Shaft final-drive
Shaft final-drives are sometimes used. This transmission program in automobile transmits power to the rear wheel via a drive shaft. Shaft drives are well-known because they are convenient and don’t need as much maintenance as chain-based systems. Nevertheless, shaft drives are heavier and sometimes cause unwanted motion, called shaft jacking, in the trunk of the motorcycle. The other components that produce a motorcycle a motorcycle are part of the chassis.
Advantages and Disadvantages
The major advantages of shaft-drive are lower maintenance and running costs, and cleanliness. Chain-drive bikes require their chains adjusting regularly plus they can be expensive to replace when they wear out.
They need lubricating often, especially in bad weather, which can be messy and inconvenient. And chain lube adds to the running costs.
Shaft-drive systems are completely enclosed and are unaffected by the elements and only require periodic oil changes.

The disadvantages of shaft-drive are that it is a lot heavier than a chain and absorbs more of the engine’s power before it reaches the rear wheel

In comparison to a Chain system

A shaft-drive can also change the actions of the trunk suspension – when the throttle is opened and closed quickly the bike may rise and squat because the shaft is trying to “climb” the cog on the trunk wheel.

Power Transmission

The chain drive system comprises of two sprockets, one on the gearbox and one on the trunk wheel, that are connected by a chain.
In a shaft-driven transmission system in automobile, a shaft connects a gear inside the gearbox to another gear inside a hub on the trunk wheel.
When the engine is sparked, power is transferred along the chain or shaft to the rear wheel, and the bike moves forward. Either system is often known as “final drive,” as it is usually the last set of components employed to deliver power to the rear wheel.

Some producers, notably Harley Davidson, have used belt drives on a few of their model line-ups. BMW, Kawasaki, and Suzuki also have attempted the belt drive system.