SX 150

1969 Lambretta SX 150 Technical Analysis & Specification Breakdown

Engineered by Lambretta for the scooter motorcycle segment, the 1969 Lambretta SX 150 utilizes a 150 cc (9.2 cu in) air-cooled single cylinder, two-stroke layout. In factory specification, peak output is rated at 8.8 HP (6.4 kW) at 5,600 rpm. With a specific output of 58.7 HP per liter, the engine character is prioritizing low-RPM tractability, mechanical longevity and relaxed throttle response over peak redline numbers.

On the scales, the SX 150 measures 109.8 kg (242 lbs) dry, translating to a power-to-weight ratio of 0.08 HP/kg (12.48 kg per horsepower).

Within MotoLibrary's Lambretta archive, this model family spans 4 indexed model years from 1966 to 1969, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.