Engine Displacement: 123.94 cc
The SP 125 is powered by a highly refined 123.94 cc, 4-stroke, single-cylinder SI engine. This "long-stroke" engine is designed for high fuel efficiency and smooth power delivery, making it an ideal companion for the daily grind in cities like Kathmandu or Delhi.
Max Power: 10.87 PS @ 7,500 rpm
The engine develops a peak power of 10.87 PS. While it is a commuter, the power-to-weight ratio allows for surprisingly brisk acceleration from traffic lights, ensuring you aren't left behind by larger displacement motorcycles in urban environments.
Max Torque: 10.9 Nm @ 6,000 rpm
With 10.9 Nm of torque available at 6,000 rpm, the SP 125 offers excellent "city-speed" pull. The torque curve is flat, meaning the bike feels responsive across the entire rev range, reducing the need for frequent gear shifts.
No. of Cylinders: 1
The single-cylinder configuration is optimized for thermal efficiency and low maintenance costs. It features a piston-cooling jet that sprays oil directly onto the piston to reduce friction and maintain a consistent temperature during long summer rides.
Valve Train: SOHC, 2-Valve
The Simple Overhead Cam (SOHC) 2-valve setup is a hallmark of reliability. It is designed to be easy to service and provides the necessary low-end grunt required for a 125cc commuter without the weight of a dual-cam system.
Fuel System: PGM-FI (Programmed Fuel Injection)
Honda’s PGM-FI system uses advanced sensors to inject the precise amount of fuel into the cylinder. In 2026, this system has been updated to OBD-2B standards, ensuring peak performance regardless of temperature or altitude changes.
Top Speed: 100 km/h
The SP 125 is capable of reaching a top speed of 100 km/h. While it can handle short highway stints, its real strength lies in cruising between 60–80 km/h, where the engine remains stress-free and silent.
Mileage: 65 kmpl
The SP 125 is legendary for its fuel economy, often delivering a real-world mileage of 60–65 kmpl. This is achieved through Honda's friction-reduction technologies and the "Eco Indicator" on the dash that helps riders maintain an efficient riding style.
