Engineered by Harley-Davidson for the sport touring motorcycle segment, the 1991 Harley-Davidson FXRS 1340 Low Rider pairs a 1337 cc (81.6 cu in) air-cooled v2, four-stroke architecture with road-focused gearing. In factory specification, peak output is rated at 49 HP (35.8 kW) at 5,000 rpm while maximum torque reaches 90.8 Nm (67 lb-ft) at 3,600 rpm, transferring power to the rear wheel through a 5-speed gearbox and belt final drive. With a specific output of 36.6 HP per liter and a 1,400 rpm working window between peak torque (3,600 rpm) and peak power (5,000 rpm), the engine character is prioritizing low-RPM tractability, mechanical longevity and relaxed throttle response over peak redline numbers.
On the scales, the FXRS 1340 Low Rider measures 276 kg (608 lbs) wet (curb), translating to a power-to-weight ratio of 0.18 HP/kg (5.63 kg per horsepower). The 16-liter (4.2 US gal) fuel tank paired with a rated consumption of 4.76 L/100 km provides an estimated theoretical range of roughly 336 km (209 miles) between fill-ups.
Within MotoLibrary's Harley-Davidson archive, this model family spans 7 indexed model years from 1986 to 1992, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
36.6 HP/L
Power-to-Weight
0.18 HP/kg (5.63 kg/HP)
Power Band Window
3,600–5,000 rpm
Theoretical Range
~336 km (209 mi)
Engine
Displacement1337.0 ccm (81.58 cubic inches)
Engine TypeV2, four-stroke
Engine DetailsV2, four-stroke
Power49.0 HP (35.8 kW)) @ 5000 RPM
Torque90.8 Nm (9.3 kgf-m or 67.0 ft.lbs) @ 3600 RPM
Compression8.5:1
Bore x Stroke88.8 x 108.0 mm (3.5 x 4.3 inches)
Valves/Cylinder2
Fuel SystemCarburettor. 34 mm Keihin
Fuel ControlOverhead Valves (OHV)
CoolingAir
Transmission
Gearbox5-speed
Final DriveBelt (final drive)
Performance
Fuel Consumption4.76 litres/100 km (21.0 km/l or 49.42 mpg)
Greenhouse Gases110.4 CO2 g/km. (CO2 - Carbon dioxide emission)
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.
Torque
Torque is useful for judging real-world pull, especially for touring, commuting and loaded riding.
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.
