Aprilia SR 125 vs Yamaha Aerox 155

Highest power the engine/motor can produce.

The highest twisting force the engine generates, which affects acceleration and pulling power.

Compression ratio is how much the engine squeezes air-fuel before ignition. Higher ratios mean more power; lower ratios improve durability.

Method used to prevent engine overheating.

Design and working of the two-wheeler's engine.

Engine cylinder capacity measured in cc.

Bore is the diameter of a bike’s engine cylinder. A larger bore allows more fuel-air mix, increasing power and speed.

Highest power a bike/scooter can produce.

The maximum distance an electric two-wheeler can travel on a full charge.

Stroke is the piston’s movement inside the engine cylinder. Longer strokes give more torque, shorter strokes give more speed and higher RPM.

Number of valves in each engine cylinder.

A tyre without an inner tube, reducing puncture risks and maintaining air longer.

The system that starts the engine, usually via a key, button, or smart start.

The distance from the center of the front wheel to the center of the rear wheel, affecting stability, handling, and riding comfort.

(Anti-locking Braking System) Prevents wheel locking during hard braking, improving control and safety.

The overall design and shape of the bike (e.g., cruiser, sports, scooter).

How power is sent to the wheels (e.g., chain, belt, shaft).

The main structure holding the bike together.

Distance between the bike’s lowest part and the ground.

Bike’s weight with fuel and fluids.

A support accessory for the passenger’s back.

A component which support foots of the passenger.

Distance from the ground to the seat.

Distance from the ground to the seat.

Wireless connection for calls, music, and navigation.

A USB slot to charge devices like phones.

Different settings (e.g., Sport, Eco, Rain) that adjust performance and power delivery.

The method to start the bike (e.g., electric start, kick start, or both).

A system that prevents wheel slip by adjusting power during acceleration on slippery surfaces.

A screen that shows important riding information like speed, fuel, and trip details.

Warns when the battery charge is low and may need recharging or replacement.

A device that connects and disconnects the engine from the wheels for smooth gear shifts.

The entire system that transfers engine power to the wheels (includes clutch and gearbox).

Flashing lights on a two-wheeler that indicate the rider's turning or lane-changing direction.

Total energy the battery can store.

The design of the seat that affects comfort and seating position.

A feature that provides turn-by-turn directions on the two-wheeler display or connected device.

A companion app to monitor bike stats, location, and settings.