GS 125
1973 Zündapp GS 125 Technical Analysis & Specification Breakdown
Built around Zündapp's enduro - offroad motorcycle platform, the 1973 Zündapp GS 125 features a 123 cc (7.5 cu in) air-cooled single cylinder, two-stroke configuration. In factory specification, peak output is rated at 18 HP (13.1 kW) at 7,600 rpm, transferring power to the rear wheel through chain final drive. With a specific output of 146.3 HP per liter, the engine character is placing it firmly in high-revving supersport territory where top-end breathing dominates.
On the scales, the GS 125 measures 109 kg (240 lbs) dry, translating to a power-to-weight ratio of 0.17 HP/kg (6.06 kg per horsepower). The 10-liter (2.6 US gal) fuel tank supports practical everyday commuting and weekend road stints, while factory top speed is listed at 115 km/h (71 mph).
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