LB 3 bop 80

1979 Yamaha LB 3 bop 80 Technical Analysis & Specification Breakdown

Engineered by Yamaha for the scooter motorcycle segment, the 1979 Yamaha LB 3 bop 80 pairs a 73 cc (4.5 cu in) air-cooled single cylinder, two-stroke architecture with road-focused gearing. In factory specification, peak output is rated at 5 HP (3.6 kW) at 6,700 rpm, transferring power to the rear wheel through a 3-speed gearbox and chain final drive. With a specific output of 68.5 HP per liter, the engine character is indicating a tractable, stress-free state of tune focused on everyday usability and broad torque delivery.

On the scales, the LB 3 bop 80 measures 82 kg (181 lbs) wet (curb), translating to a power-to-weight ratio of 0.06 HP/kg (16.4 kg per horsepower). The 3.5-liter (0.9 US gal) fuel tank supports practical everyday commuting and weekend road stints, while factory top speed is listed at 65 km/h (40 mph).

Within MotoLibrary's Yamaha archive, this model family spans 2 indexed model years from 1978 to 1979, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.