Hyosung RX125SM - 2008 Specifications and Reviews

The 2008 Hyosung RX125SM is a lightweight supermoto designed for beginner and intermediate riders seeking an accessible, nimble streetbike. Powered by a 124cc single-cylinder engine with five-speed transmission, it delivers manageable performance with the aggressive styling and upright ergonomics of a modern supermoto platform. Best known for its affordability and playful handling characteristics, the RX125SM suits urban commuters and riders transitioning to larger bikes.

2008
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General information

CategorySuper motard
Year2008
ModelHyosung RX125SM

Engine and Transmission Specifications

Transmission typefinal driveChain
Gearbox5-speed
StarterElectric
Fuel controlDOHC
Valves per cylinder4
Fuel systemCarburettor. BDS26
Stroke4
Engine typeSingle cylinder
Capacity:124.00 ccm (7.57 cubic inches)
 
 

Physical measures and capacities

Wheelbase1,430 mm (56.3 inches)
Ground clearance275 mm (10.8 inches)
Overall width840 mm (33.1 inches)
Overall length2,175 mm (85.6 inches)
Overall height1,150 mm (45.3 inches)
Seat height825 mm (32.5 inches) If adjustable, lowest setting.
Dry weight123.0 kg (271.2 pounds)

Hyosung RX125SM dimensions and frame

Rear brakesSingle disc
Front brakesSingle disc
Rear tyre dimensions130/70-M17
Front tyre dimensions110/70-M17
 
 

Speed and acceleration

Color optionsYellow/black
Fuel capacity8.00 litres (2.11 gallons)

Other specs

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

Performance Profile & Rider Fit

14 hp
Peak Power (est.)
13.5s
0-60 mph (est.)

Best For

Track25%
City80%
Cornering60%
Daily Riding62%
Touring12%
Passenger30%

Rider Profile

Best ForIdeal for beginners and learner-permit riders; its small 125cc engine and light weight make it forgiving and approachable.
PurposeA supermoto-styled commuter for city streets and back-road fun, built for nimble urban riding rather than speed or distance.
Rider FitTall 825mm seat and upright supermoto stance, but very light at 123kg dry with a narrow, easy-to-flick chassis on 17-inch road wheels.
CharacterCheeky, lightweight learner supermoto-more style and agility than outright power, a fun and playful entry-level machine.
Not Ideal ForNot for highway touring, two-up trips, serious off-road use, or riders wanting real speed and power.

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

Rider Fit Visualizer

2008 Hyosung RX125SM Rider Ergonomics Assessment

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Feet:

At 825mm, a rider of 175cm with a 79cm (estimated) inseam will reach the ground with balls of both feet on the 2008 Hyosung RX125SM, with a relaxed knee angle of around 125 degrees and a forward-leaning riding position.

Data quality: measured. Assumes about 30mm of suspension sag once seated (a typical street-bike rule of thumb - stiffer or softer suspension will vary). This is an approximation from category-typical geometry and generic body proportions, not a measurement of this specific bike or you - sit on it before you buy.

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