Rieju Marathon 125 Pro - 2021 Specifications and Reviews

The 2021 Rieju Marathon 125 Pro is a lightweight enduro bike ideal for beginner and intermediate off-road riders. Powered by a reliable Yamaha-sourced 125cc four-stroke engine producing 15 horsepower, it combines nimble handling with a robust steel frame and liquid cooling. Best known for its accessible performance and durable construction, it excels on trails and mixed terrain.

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General information

CategoryEnduro / offroad
Year2021
ModelRieju Marathon 125 Pro
 
 

Engine and Transmission Specifications

Exhaust systemInox
Transmission typeChain   (final drive)
Gearbox6-speed
Cooling systemLiquid
Fuel systemCarburettor. Keihin 39S
Valves per Cylinder4
Bore x Stroke52.0 x 58.6 mm (2.0 x 2.3 inches)
Power15.0 HP (10.9 kW)
Engine detailsYamha engine
Engine typeSingle cylinder, four-stroke
Capacity:125.0 ccm (7.63 cubic inches)

Brakes, suspension, Frame and wheels

WheelsAlloy Rims
Rear brakesSingle disc. Galfer Wave
Diameter300 mm (11.8 inches)
Front brakesSingle disc. Galfer wave disc with double piston caliper
Rear tire110/80-18
Front tire80/90-21
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 capacity6.32 litres (1.67 US gallons)
Wheelbase1405 mm (55.3 inches)
Overall width800 mm (31.5 inches)
Overall length2070 mm (81.5 inches)
Overall height1165 mm (45.9 inches)
Seat height890 mm (35.0 inches) If adjustable, lowest setting.
Power/weight ratio0.1240 HP/kg
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 optionsBlack/white/red, black/red

Performance Profile & Rider Fit

15 hp
Peak Power

Best For

Track15%
City45%
Cornering55%
Daily Riding40%
Touring20%
Passenger15%

Rider Profile

Best ForThis bike suits newer or smaller riders and those wanting a light, unintimidating machine to build off-road skills, though its tall seat height demands reasonable inseam confidence.
PurposeIt is built primarily for trail riding, technical enduro tracks, and low-speed off-road exploration rather than any kind of speed or highway work.
Rider FitThe very low dry weight and slim chassis make it easy to muscle around, lift, and paddle through tricky terrain, but the tall seat height can challenge shorter riders.
CharacterIt has the character of a nimble, willing little enduro trail bike, eager to be flicked around obstacles but with only modest engine punch.
Not Ideal ForIt is not suited to riders wanting sustained highway speeds, long-distance touring comfort, or carrying a passenger any real distance.

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

Rider Fit Visualizer

2021 Rieju Marathon 125 Pro Rider Ergonomics Assessment

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

Feet:

At 890mm, a rider of 175cm with a 79cm (estimated) inseam will reach the ground with cannot reach comfortably on the 2021 Rieju Marathon 125 Pro, with a cramped knee angle of around 80 degrees and an upright 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 Pro is a fantastic motorcycle that delivers an impressive performance on both urban streets and off-road terrain. Its 125cc liquid-cooled, single-cylinder engine provides ample power for thrilling acceleration, while its lightweight and nimble design make it easy to maneuver through tight spaces. The bike's modern suspension and sturdy frame ensure a smooth and stable ride, even on the most rugged trails. With its rugged looks and versatile capabilities, the Rieju Marathon 125 Pro is a great choice for riders who want a reliable and capable motorcycle for both daily commuting and weekend adventures. Overall, the 2021 Rieju Marathon 125 Pro is a highly capable and versatile motorcycle that offers an exciting riding experience for both new and experienced riders. Its powerful engine, agile handling, and rugged design make it well-suited for navigating diverse terrains and tackling various riding conditions. Whether you're cruising through city streets or exploring off-road trails, the Rieju Marathon 125 Pro provides a thrilling and reliable performance that is sure to impress.
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