Rieju Marathon 125 SM Pro - 2021 Specifications and Reviews

The 2021 Rieju Marathon 125 SM Pro is a lightweight supermoto designed for riders seeking urban agility and off-road capability. Powered by a reliable Yamaha-sourced 125cc four-stroke engine with a six-speed gearbox, it excels in mixed terrain riding. The inverted front forks and steel perimeter frame deliver responsive handling for both street and trail adventures.

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General information

CategorySuper motard
Year2021
ModelRieju Marathon 125 SM Pro

Engine and Transmission Specifications

Exhaust systemRacing muffle
Transmission typeChain   (final drive)
Gearbox6-speed
Cooling systemAir
Fuel systemCarburettor. Keihin 39s
Valves per Cylinder4
Bore x Stroke52.0 x 58.6 mm (2.0 x 2.3 inches)
Engine detailsYamaha engine
Engine typeSingle cylinder, four-stroke
Capacity:125.0 ccm (7.63 cubic inches)

Brakes, suspension, Frame and wheels

Rear brakesSingle disc. Galfer wave disk.
Diameter300 mm (11.8 inches)
Front brakesSingle disc. Double piston caliper. Galfer wave disk.
Rear tire130/70-17
Front tire100/80-17
Rear SuspensionGas Mono-shock Shock absorber and Seaprate Bottle Prs System
Front SuspensionR16v inverted Fork of Ø40mm.
Frame typeHighly resistant double cradle steel perimeter. Detachable rear sub-chassis.
 
 

Physical measures and capacities

Fuel capacity6.30 litres (1.66 US gallons)
Wheelbase1380 mm (54.3 inches)
Overall width800 mm (31.5 inches)
Overall length2070 mm (81.5 inches)
Overall height1145 mm (45.1 inches)
Seat height870 mm (34.3 inches) If adjustable, lowest setting.
Dry weight121.0 kg (266.8 pounds)

Other specs

MaintenanceFind parts, fluids, filters, maintenance tools and service items on eBay
CommentsSpanish brand.
Electrical12 Volt
InstrumentsDigital
StarterElectric
Color optionsBack, white

Performance Profile & Rider Fit

15 hp
Peak Power
14.5s
0-60 mph

Best For

Track55%
City80%
Cornering82%
Daily Riding55%
Touring20%
Passenger25%

Rider Profile

Best ForWell suited to newer riders or those on a restricted license who want a light, playful supermoto to build skills on.
PurposeDesigned for flickable urban riding and sharpened cornering fun rather than outright speed or distance covering.
Rider FitIts tall seat height and slim, light chassis make it easy to manage for most body sizes despite the lofty stance.
CharacterA nimble, high-revving small-bore supermoto that rewards an energetic, momentum-focused riding style.
Not Ideal ForNot a good match for riders wanting sustained highway speeds, long-distance touring comfort, or serious off-road capability.

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

Rider Fit Visualizer

2021 Rieju Marathon 125 SM Pro Rider Ergonomics Assessment

Calculated in your browser only - your height/inseam are never sent to our servers.

Feet:

At 870mm, a rider of 175cm with a 79cm (estimated) inseam will reach the ground with tip-toe one foot on the 2021 Rieju Marathon 125 SM Pro, with a relaxed knee angle of around 135 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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Rider Reviews

Total comments: 1
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MotorcycleDB Review

The 2021 Rieju Marathon 125 SM Pro is a top-notch motorcycle that offers a thrilling riding experience. With its powerful 125cc engine and lightweight design, this bike is perfect for both city commuting and off-road adventures. The SM Pro model features top-of-the-line suspension and brakes, providing excellent handling and safety on various terrains. The stylish and aggressive look of the Marathon 125 SM Pro makes it stand out from the crowd, while the comfortable seating position ensures a smooth and enjoyable ride. Overall, the 2021 Rieju Marathon 125 SM Pro is a fantastic choice for riders looking for a versatile and reliable motorcycle. Whether you're a beginner or an experienced rider, this bike offers impressive performance and agility. With its advanced features and modern design, the Rieju Marathon 125 SM Pro is definitely a standout in its class and is worth considering for anyone in the market for a new motorcycle.
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