VS 125 Roadster

1999 Sachs VS 125 Roadster Technical Analysis & Specification Breakdown

Positioned in Sachs's naked motorcycle lineup, the 1999 Sachs VS 125 Roadster pairs a 124 cc (7.6 cu in) air-cooled v2, four-stroke architecture with road-focused gearing. In factory specification, peak output is rated at 14 HP (10.2 kW) at 9,500 rpm while maximum torque reaches 10 Nm (7.3 lb-ft) at 9,000 rpm, transferring power to the rear wheel through a 5-speed gearbox and chain final drive. With a specific output of 112.9 HP per liter and a 500 rpm working window between peak torque (9,000 rpm) and peak power (9,500 rpm), the engine character is reflecting a performance-oriented street tune that balances strong mid-range pull with an energetic top-end rush.

On the scales, the VS 125 Roadster measures 151 kg (333 lbs) wet (curb), translating to a power-to-weight ratio of 0.09 HP/kg (10.79 kg per horsepower). Rider ergonomics and chassis geometry center around a 770 mm (30.3 in) seat height — offering a neutral standover height that accommodates most average-inseam riders without sacrificing cornering clearance, combined with a 1,495 mm (58.9 in) wheelbase engineered for balanced agility and highway composure. The 20-liter (5.3 US gal) fuel tank paired with a rated consumption of 4.1 L/100 km provides an estimated theoretical range of roughly 488 km (303 miles) between fill-ups, while factory top speed is listed at 105 km/h (65 mph).