125 Sport HP 1

1987 Fantic 125 Sport HP 1 Technical Analysis & Specification Breakdown

Built around Fantic's speedway motorcycle platform, the 1987 Fantic 125 Sport HP 1 relies on a 124 cc (7.6 cu in) liquid-cooled single cylinder, two-stroke powerplant. In factory specification, peak output is rated at 26 HP (19 kW) at 9,000 rpm, transferring power to the rear wheel through a 6-speed gearbox and chain final drive. With a specific output of 209.7 HP per liter, the engine character is placing it firmly in high-revving supersport territory where top-end breathing dominates.

On the scales, the 125 Sport HP 1 measures 110 kg (243 lbs) wet (curb), translating to a power-to-weight ratio of 0.24 HP/kg (4.23 kg per horsepower). The 12.5-liter (3.3 US gal) fuel tank supports practical everyday commuting and weekend road stints, while factory top speed is listed at 140 km/h (87 mph).

Within MotoLibrary's Fantic archive, this model family spans 4 indexed model years from 1987 to 1990, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.