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Technical Overview
2009 Hyosung SF 50R Rally Technical Analysis & Specification Breakdown
Built around Hyosung's scooter motorcycle platform, the 2009 Hyosung SF 50R Rally features a 49 cc (3 cu in) air-cooled single cylinder, two-stroke configuration. Internal engine geometry specifies a 7.2:1 compression ratio.
On the scales, the SF 50R Rally measures 90 kg (198 lbs) dry. Rider ergonomics and chassis geometry center around a 745 mm (29.3 in) seat height — giving shorter riders and urban commuters confident flat-foot reach at traffic stops, combined with a 1,270 mm (50 in) wheelbase engineered for quick, flickable steering geometry. The 4.8-liter (1.3 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Standover Height
745 mm (29.3 in)
Engine
Displacement49.0 ccm (2.99 cubic inches)
Engine TypeSingle cylinder, two-stroke
Engine DetailsSingle cylinder, two-stroke
Compression7.2:1
Fuel SystemCarburettor. VM14
CoolingAir
Transmission
GearboxAutomatic
Final DriveBelt (final drive)
ClutchDry shoe Automatic Centrifugal
Chassis
Wheelbase1270 mm (50.0 inches)
Ground Clearance125 mm (4.9 inches)
Wheels & Brakes
Front Tyre120/90-10
Rear Tyre130/90-10
Front BrakesSingle disc
Rear BrakesExpanding brake (drum brake)
Dimensions & Weight
Dry Weight90.0 kg (198.4 pounds)
Seat Height745 mm (29.3 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.
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.
