Chain final-drive systems are the most common. In this technique, a sprocket installed to the output shaft (i.e., the shaft in the tranny) is connected to a sprocket attached to the trunk wheel of the motorcycle by a metal chain. When the tranny turns the smaller front sprocket, power is 
usually transmitted along the chain to the bigger rear sprocket, which in turn turns the trunk wheel. This type of transmission program in automobile should be lubricated and adjusted, and the chain stretches and the sprockets put on, requiring periodic replacements.
Belt drives
Belt drives are an alternative 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, especially in wet weather, so they were abandoned for additional materials and designs. By the 1980s, developments in materials made belt final-drive tranny system in automobile practical again. Today’s belts are made of cogged rubber and operate much the same way as metallic chains. Unlike steel chains, they don’t need lubrication or cleaning solvents.
Shaft final-drive
Shaft final-drives are occasionally used. This transmission program in automobile transmits capacity to the rear wheel with a drive shaft. Shaft drives are popular because they are hassle-free and don’t require as much maintenance as chain-based systems. Nevertheless, shaft drives are heavier and sometimes may cause unwanted motion, known as shaft jacking, in the trunk of the motorcycle. The other components that make a motorcycle a motorcycle are section of the chassis.
Advantages and Disadvantages
The major benefits of shaft-drive are lower maintenance and running costs, and cleanliness. Chain-drive bikes require their chains adjusting frequently and they can be costly to displace when they wear out.
They need lubricating often, specifically in bad weather, which may be messy and inconvenient. And chain lube increases the running costs.
Shaft-drive systems are fully enclosed and so are unaffected by the weather and only need periodic oil changes.
The disadvantages of shaft-drive are that it’s 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 may also change the action of the trunk suspension – when the throttle is opened and closed quickly the bike may rise and squat since the shaft is trying to “climb” the cog on the back wheel.
Power Transmission
The chain drive system is made up 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 in the 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 commonly referred to as “final drive,” since it is usually the last set of components employed to provide power to the rear wheel.
Some manufacturers, notably Harley Davidson, have used belt drives on some of their model line-ups. BMW, Kawasaki, and Suzuki have also attempted the belt drive system.