Positioned in Sachs's naked motorcycle lineup, the 2011 Sachs Roadster 125 utilizes a 124 cc (7.6 cu in) single cylinder, four-stroke layout. In factory specification, peak output is rated at 8.9 HP (6.5 kW) at 9,500 rpm, transferring power to the rear wheel through a 5-speed gearbox and chain final drive. With a specific output of 71.8 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 Roadster 125 measures 145 kg (320 lbs) dry, translating to a power-to-weight ratio of 0.06 HP/kg (16.29 kg per horsepower). Rider ergonomics and chassis geometry center around a 780 mm (30.7 in) seat height — offering a neutral standover height that accommodates most average-inseam riders without sacrificing cornering clearance, combined with a 1,385 mm (54.5 in) wheelbase engineered for quick, flickable steering geometry. The 20-liter (5.3 US gal) fuel tank supports practical everyday commuting and weekend road stints, while factory top speed is listed at 85 km/h (53 mph).
Within MotoLibrary's Sachs archive, this model family spans 3 indexed model years from 1998 to 2011, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
71.8 HP/L
Power-to-Weight
0.06 HP/kg (16.29 kg/HP)
Standover Height
780 mm (30.7 in)
Engine
Displacement124.0 ccm (7.57 cubic inches)
Engine TypeSingle cylinder, four-stroke
Engine DetailsSingle cylinder, four-stroke
Power8.9 HP (6.5 kW)) @ 9500 RPM
Fuel SystemCarburettor
IgnitionCDI
Transmission
Gearbox5-speed
Final DriveChain (final drive)
Performance
Top Speed85.0 km/h (52.8 mph)
Chassis
Front SuspensionTelescopic fork
Wheelbase1385 mm (54.5 inches)
Wheels & Brakes
Front Tyre110/70-17
Rear Tyre110/70-17
Front BrakesDouble disc. Wave disk
Rear BrakesSingle disc. Wave disk
Dimensions & Weight
Dry Weight145.0 kg (319.7 pounds)
Power/Weight0.0615 HP/kg
Seat Height780 mm (30.7 inches) If adjustable, lowest setting.
Use this page to compare this motorcycle by its real specifications, not only by model name. Focus on the details that affect fit, comfort, handling, range and ownership.
Power
Compare engine output with similar motorcycles if acceleration, highway use or two-up riding matters.
Seat Height
Check the seat height against your inseam and riding posture before choosing a motorcycle.
Weight
Compare weight carefully because it affects low-speed handling, parking and confidence.
Fuel Capacity
Fuel capacity helps estimate touring range and how often you may need to stop.
Brakes
Brake setup is worth comparing if you ride in traffic, mountains or with a passenger.
Suspension
Suspension details can matter for comfort, road feel and long-distance riding.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
