At the heart of the 1980 Simson S51 B1-4 allround motorcycle, Simson relies on a 49.8 cc (3 cu in) air-cooled single cylinder, two-stroke powerplant. In factory specification, peak output is rated at 3.7 HP (2.7 kW) at 5,500 rpm, transferring power to the rear wheel through a 4-speed gearbox and chain final drive.
On the scales, the S51 B1-4 measures 78.5 kg (173 lbs) dry. The 8.7-liter (2.3 US gal) fuel tank supports practical everyday commuting and weekend road stints, while factory top speed is listed at 60 km/h (37 mph).
Engine
Displacement49.8 ccm (3.04 cubic inches)
Engine TypeSingle cylinder, two-stroke
Engine DetailsSingle cylinder, two-stroke
Power3.7 HP (2.7 kW)) @ 5500 RPM
Fuel SystemCarburettor
IgnitionElectronic
CoolingAir
Transmission
Gearbox4-speed
Final DriveChain (final drive)
Performance
Top Speed60.0 km/h (37.3 mph)
Chassis
Frame TypeSteel Frame
Wheels & Brakes
Front BrakesExpanding brake (drum brake)
Rear BrakesExpanding brake (drum brake)
Dimensions & Weight
Dry Weight78.5 kg (173.1 pounds)
Power/Weight0.0471 HP/kg
Fuel Capacity8.70 litres (2.30 US gallons)
Reserve Fuel0.70 litres (0.18 US gallons)
Other
StarterKick
Color OptionsRed, Yellow, Acid-Green, Dark-Green, Black, Sky-Blue, Navy
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.
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.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
