Tomos BT 50 N - 1991 Specifications and Reviews

The 1991 Tomos BT 50 N is a lightweight 50cc sport moped designed for young riders and commuters seeking nimble urban mobility. Powered by a spirited two-stroke engine delivering nearly 5.4 horsepower, it achieves respectable speeds up to 90 km/h while maintaining excellent fuel efficiency. Best known for its reliable Bing carburetor and responsive five-speed transmission, this Slovenian-built machine remains popular among entry-level sport riders.

1991
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Engine and Transmission Specifications

Exhaust systemcantor
Transmission type,final driveChain
Gearbox5-speed
Cooling systemAir
Fuel systemCarburettor. Bing 18mm
Bore x stroke38.0 x 43.0 mm (1.5 x 1.7 inches)
Compression11.0:1
Max RPM8500
Top speed90.0 km/h (55.9 mph)
Torque5.00 Nm (0.5 kgf-m or 3.7 ft.lbs) @ 7500
Power5.36
Engine typeSingle cylinder, two-stroke
Capacity:49.00 ccm (2.99 cubic inches)

CategorySport
Year1991
ModelTomos BT 50 N
 
 

Brakes, suspension, Frame and wheels

Rear brakesExpanding brake (drum brake)
Front brakesSingle disc
 
 

Physical measures and capacities

Fuel capacity9.50 litres (2.51 gallons)

Other specs

MaintenanceFind parts, fluids, filters, maintenance tools and service items on eBay
StarterKick

Performance Profile & Rider Fit

5.4 hp
Peak Power
55.9 mph
Top Speed

Best For

Track5%
City55%
Cornering40%
Daily Riding30%
Touring8%
Passenger10%

Rider Profile

Best ForThis is a beginner-level moped, well suited to new riders or young learners taking their first steps on two wheels.
PurposeBuilt as a small-displacement sport moped for short, fun rides around town rather than any serious performance riding.
Rider FitVery light and low-powered, so it requires minimal physical strength or stamina to handle, though the small proportions may feel cramped for taller riders.
CharacterA nimble, buzzy little two-stroke with sporty styling that rewards revving it out rather than relying on outright power.
Not Ideal ForThis is not the machine for anyone wanting real speed, long-distance touring comfort, or a passenger-friendly ride.

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

Rider Reviews

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