Simson S51 B1-4 - 1980 Specifications and Reviews

The Simson S51 B1-4 is a lightweight 50cc allrounder designed for everyday commuting and learner riders. Its reliable single-cylinder two-stroke engine with electronic ignition delivers modest performance in a nimble 78.5kg package. Best known for practical simplicity and East German durability, it became an iconic entry-level motorcycle across Europe.

1980
4 stars Average rating: 4 from 3 votes
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Engine and Transmission Specifications

Transmission typefinal driveChain
Gearbox4-speed
Cooling systemAir
StarterKick
IgnitionElectronic
Fuel systemCarburettor
Power3.70
Stroke2
Engine typeSingle cylinder
Capacity:49.80 ccm (3.04 cubic inches)
 
 

Physical measures and capacities

Dry weight78.5 kg (173.1 pounds)

Simson S51 B1-4 dimensions and frame

Rear brakesExpanding brake (drum brake)
Front brakesExpanding brake (drum brake)
Frame typeSteel Frame

Speed and acceleration

Power/weight ratio0.0471 HP/kg
Top speed60.0 km/h (37.3 mph)

CategoryAllround
Year1980
ModelSimson S51 B1-4

Other specs

MaintenanceFind parts, fluids, filters, maintenance tools and service items on eBay
Color optionsRed, Yellow, Acid-Green, Dark-Green, Black, Sky-Blue, Navy
Reserve fuel capacity0.70 litres (0.18 gallons)
Fuel capacity8.70 litres (2.30 gallons)

Performance Profile & Rider Fit

3.7 hp
Peak Power
37.3 mph
Top Speed

Best For

Track2%
City55%
Cornering20%
Daily Riding35%
Touring8%
Passenger15%

Rider Profile

Best ForIdeal for absolute beginners, young riders, or anyone wanting a simple, low-stakes introduction to motorised two-wheelers.
PurposeBuilt as a lightweight, low-powered moped for short, low-speed trips around town rather than any kind of performance riding.
Rider FitVery light and easy to handle, requiring minimal strength or experience to manage at a standstill or low speeds.
CharacterA charmingly basic, no-frills classic East German moped with modest performance and simple mechanicals.
Not Ideal ForNot suitable for highway travel, long-distance touring, carrying a passenger comfortably, or anyone seeking speed or excitement.

Character map is an editorial estimate based on this bike's specifications, not a lab-tested measurement.

Rider Reviews

Total comments: 1
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MotorcycleDB Review

The 1980 Simson S51 B1-4 is a classic East German motorcycle known for its quality construction and reliable performance. This two-stroke, single-cylinder bike is equipped with a 50cc engine and a four-speed manual transmission, making it ideal for city commuting and short trips. The S51 B1-4 also features a sturdy chassis, comfortable seating, and smooth handling, making it a desirable choice for vintage motorcycle enthusiasts. Overall, the 1980 Simson S51 B1-4 is a superb choice for anyone seeking a well-built, reliable vintage motorcycle. Its compact size, efficient engine, and classic design make it a practical and stylish choice for urban riding. Whether you're a collector or a rider looking for a unique and dependable bike, the Simson S51 B1-4 is sure to leave a lasting impression.
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