TL 125 S

1978 Honda TL 125 S Technical Analysis & Specification Breakdown

Built around Honda's trial motorcycle platform, the 1978 Honda TL 125 S relies on a 124 cc (7.6 cu in) air-cooled single cylinder, four-stroke powerplant. In factory specification, peak output is rated at 9 HP (6.6 kW) at 8,750 rpm, transferring power to the rear wheel through a 5-speed gearbox and chain final drive. With a specific output of 72.6 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 TL 125 S measures 106 kg (234 lbs) wet (curb), translating to a power-to-weight ratio of 0.08 HP/kg (11.78 kg per horsepower). The 4.5-liter (1.2 US gal) fuel tank supports practical everyday commuting and weekend road stints, while factory top speed is listed at 90 km/h (56 mph).

Within MotoLibrary's Honda archive, this model family spans 2 indexed model years from 1977 to 1978, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.