The engine and fuel system directly affect fuel burning efficiency. In cases of excessive fuel-air mixture richness or incomplete combustion, the bike would consume either excess or inadequate fuel to maintain the same performance level.

The two main reasons include:

• Blocked airflow by a dirty air filter.

• A dirty fuel injector or carburettor.

• Burned-out spark plug.

• Fuel is bad or contaminated.

• Incorrect fuel-air mixture ratio.

A lack of air supply or inadequate combustion requires burning more petrol to generate enough power. Good bike servicing will ensure that such problems are detected, rather than changing components unnecessarily.

Riding behaviour and environmental conditions

All issues related to mileage do not result from an equipment failure. Your riding behaviour greatly affects your fuel economy. Often, abrupt acceleration, heavy braking, long idling periods, and constant high-RPM riding result in fuel waste.

It will also influence the mileage of your fuel—more acceleration and braking than gliding dry mileage for the car. Overloading or under-inflation of tyres puts extra load on the engine, increasing fuel consumption.