Chain final-drive systems are by far the most common. In this technique, a sprocket mounted to the output shaft (i.e., the shaft in the tranny) is linked to a sprocket attached to the rear wheel of the motorcycle by a metal chain. When the tranny turns the smaller sized front sprocket, power 
can be transmitted along the chain to the larger rear sprocket, which then turns the trunk wheel. This type of transmission system in automobile should be lubricated and modified, and the chain stretches and the sprockets wear, requiring periodic replacements.
Belt drives
Belt drives are an alternative solution to chain drives. Early motorcycles frequently used leather belts, that could be tensioned to provide traction utilizing a spring-loaded pulley and hand lever. Natural leather belts often slipped, specifically in wet weather, so these were abandoned for various other materials and designs. By the 1980s, developments in components made belt final-drive transmitting system in automobile viable once again. Today’s belts are made from cogged rubber and operate much the same 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 with a drive shaft. Shaft drives are well-known because they are easy and don’t need as much maintenance as chain-based systems. However, shaft drives are heavier and sometimes cause unwanted motion, known as shaft jacking, in the rear of the motorcycle. The additional components that make a motorcycle a motorcycle are area of the chassis.
Advantages and Disadvantages
The major advantages of shaft-drive are lower maintenance and running costs, and cleanliness. Chain-drive bikes need their chains adjusting frequently and they could be costly to replace when they wear out.
They need lubricating often, specifically 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 need 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 trunk wheel
In comparison to a Chain system
A shaft-drive can also change the actions of the rear 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 rear wheel.
When the engine is sparked, power is transferred along the chain or shaft to the trunk wheel, and the bike moves forward. Either program is commonly known as “final drive,” since it is 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 experimented with the belt drive system.