2007 Hyosung SF 50 Rally Technical Analysis & Specification Breakdown
At the heart of the 2007 Hyosung SF 50 Rally scooter motorcycle, Hyosung features a 49 cc (3 cu in) air-cooled single cylinder, two-stroke configuration. In factory specification, peak output is rated at 3.5 HP (2.5 kW) at 6,800 rpm, transferring power to the rear wheel through a automatic gearbox and belt final drive. Internal engine geometry specifies a bore and stroke of 41.0 x 37.7 mm (1.6 x 1.5 inches) with a 7.2:1 compression ratio.
On the scales, the SF 50 Rally measures 88 kg (194 lbs) wet (curb). Rider ergonomics and chassis geometry center around a 730 mm (28.7 in) seat height — giving shorter riders and urban commuters confident flat-foot reach at traffic stops. The 4.3-liter (1.1 US gal) fuel tank supports practical everyday commuting and weekend road stints, while factory top speed is listed at 45 km/h (28 mph).
Within MotoLibrary's Hyosung archive, this model family spans 3 indexed model years from 2005 to 2007, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Standover Height
730 mm (28.7 in)
Engine
Displacement49.0 ccm (2.99 cubic inches)
Engine TypeSingle cylinder, two-stroke
Engine DetailsSingle cylinder, two-stroke
Power3.5 HP (2.5 kW)) @ 6800 RPM
Compression7.2:1
Bore x Stroke41.0 x 37.7 mm (1.6 x 1.5 inches)
Fuel SystemCarburettor. VM14SH
CoolingAir
Transmission
GearboxAutomatic
Final DriveBelt (final drive)
Performance
Top Speed45.0 km/h (28.0 mph)
Wheels & Brakes
Front Tyre120/90-10
Rear Tyre130/90-10
Front BrakesSingle disc
Front Brake Ø162 mm (6.4 inches)
Rear BrakesExpanding brake (drum brake)
Rear Brake Ø100 mm (3.9 inches)
Dimensions & Weight
Dry Weight82.0 kg (180.8 pounds)
Weight incl.88.0 kg (194.0 pounds)
Power/Weight0.0424 HP/kg
Seat Height730 mm (28.7 inches) If adjustable, lowest setting.
Fuel Capacity4.30 litres (1.14 US gallons)
Other
StarterElectric & kick
Color OptionsTitan grey/silver, red/silver, yellow/silver, blue/silver
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.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
