2005 Hyosung SF 50 Rally Technical Analysis & Specification Breakdown
Built around Hyosung's scooter motorcycle platform, the 2005 Hyosung SF 50 Rally relies on a 49 cc (3 cu in) single cylinder, two-stroke powerplant. 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. Internal engine geometry specifies a bore and stroke of 41.0 x 37.4 mm (1.6 x 1.5 inches) with a 7.2:1 compression ratio.
On the scales, the SF 50 Rally measures 95 kg (209 lbs) dry. Rider ergonomics and chassis geometry center around a 740 mm (29.1 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.
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
740 mm (29.1 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 37.4 mm (1.6 x 1.5 inches)
Transmission
GearboxAutomatic
Chassis
Front SuspensionTelescopic
Front Travel75 mm (3.0 inches)
Rear SuspensionSwingarm
Rear Travel65 mm (2.6 inches)
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 Weight95.0 kg (209.4 pounds)
Power/Weight0.0363 HP/kg
Seat Height740 mm (29.1 inches) If adjustable, lowest setting.
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.
Suspension
Suspension details can matter for comfort, road feel and long-distance riding.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
