Supermotos
2021Rieju Marathon 125 SM Pro
32 fields on record
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.
- Capacity
- 125.0 ccm
- Engine
- Single, four-stroke
- Gearbox
- 6-speed
- Dry weight
- 121.0 kg
- Seat height
- 870 mm
- Power
- 15.0 HP (11.0 kW)
What’s new for the 2021 Rieju Marathon 125 SM Pro
vs the 2020| Spec | 2020 | 2021 |
|---|---|---|
| Torque | — | 11.0 Nm (1.1 kgf-m or 8.1 ft.lbs) @ 8000 RPM |
| Dry weight | 95.0 kg (209.4 pounds) | 121.0 kg (266.8 pounds) |
| Front suspension | Fork of Ø36mm. | R16v inverted Fork of Ø40mm. |
| Rear suspension | Mono-shock shock absorber | Gas Mono-shock Shock absorber and Seaprate Bottle Prs System |
| Front brakes | Single disc. Double piston caliper. | Single disc. Double piston caliper. Galfer wave disk. |
| Rear brakes | Single disc | Single disc. Galfer wave disk. |
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- Designed for flickable urban riding and sharpened cornering fun rather than outright speed or distance covering.
- Built for
- A nimble, high-revving small-bore supermoto that rewards an energetic, momentum-focused riding style.
- Not ideal for
- Not a good match for riders wanting sustained highway speeds, long-distance touring comfort, or serious off-road capability.
Scores are derived from the spec sheet using the same model across every bike, so they compare like for like.
Will it fit you?
Worked out in your browser - nothing is sent to usEngine
- Capacity
- 125.0 ccm
- Power
- 15.0 HP (11.0 kW)
- Torque
- 11.0 Nm (1.1 kgf-m) @ 8000 RPM
- Engine type
- Single, four-stroke
- Power/weight ratio
- 0.1240 HP/kg (dry)
- Bore x stroke
- 52.0 x 58.6 mm
- Cooling system
- Air
- Fuel system
- Carburettor
- Starting
- Electric
- Valves per cylinder
- 4
Transmission
- Gearbox
- 6-speed
- Transmission type
- Manual
- Final drive
- Chain
Dimensions & weight
- Wheelbase
- 1380 mm
- Overall length
- 2070 mm
- Overall width
- 800 mm
- Overall height
- 1145 mm
- Seat height
- 870 mm
- Dry weight
- 121.0 kg
- Fuel capacity
- 6.30 litres
Chassis & suspension
- Frame
- Highly resistant double cradle steel perimeter. Detachable rear sub-chassis.
- Front suspension
- R16v inverted Fork of Ø40mm.
- Rear suspension
- Gas Mono-shock Shock absorber and Seaprate Bottle Prs System
Brakes & wheels
- Front brakes
- Single disc. Double piston caliper. Galfer wave disk.
- Front brakes diameter
- 300 mm
- Rear brakes
- Single disc. Galfer wave disk.
- Rear brakes diameter
- 200 mm
- Front tyre
- 100/80-17
- Rear tyre
- 130/70-17
Other
- Color options
- Back, white
- Comments
- Spanish brand.
Specs last verified against published sources: .
Compiled from manufacturer documentation and user contributions, corrected on an ongoing basis. Spotted something wrong? Tell us.
What changed, year to year
Differences highlighted| Specification | 2017 | 2019 | 2021 | 2022 | 2024 | 2026 |
|---|---|---|---|---|---|---|
| Capacity | 125 cc | 125 cc | 125 cc | 125 cc | 125 cc | 125 cc |
| Dry weight | 95 kg | 95 kg | 121 kg | 121 kg | 121 kg | 112 kg |
| Seat height | 870 mm | 870 mm | 870 mm | 870 mm | 870 mm | 876 mm |
| Fuel capacity | 6.3 L | 6.3 L | 6.3 L | 6.3 L | 6.3 L | 6 L |
Illustrative - generated automatically by diffing the year records already on file, not a manufacturer-published changelog.
Rider Reviews
Common questions
What is the engine size of the Rieju Marathon 125 SM Pro?
The 2021 Rieju Marathon 125 SM Pro has a Capacity of 125.0 ccm (7.63 cubic inches).
What engine power does the Rieju Marathon 125 SM Pro have?
The 2021 Rieju Marathon 125 SM Pro has a Power of 15.0 HP (11.0 kW).
How many gears does the Rieju Marathon 125 SM Pro have?
The 2021 Rieju Marathon 125 SM Pro has a Gearbox of 6-speed.
What is the torque of the Rieju Marathon 125 SM Pro?
The 2021 Rieju Marathon 125 SM Pro has a Torque of 11.0 Nm (1.1 kgf-m or 8.1 ft.lbs) @ 8000 RPM.
How much does the Rieju Marathon 125 SM Pro weigh?
The 2021 Rieju Marathon 125 SM Pro has a Dry weight of 121.0 kg (266.8 pounds).
Shop this bike
Affiliate linksWe may earn a commission from qualifying eBay or Amazon purchases made through these links. As an Amazon Associate I earn from qualifying purchases.
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.
Please log in or register if you'd like to leave a comment.
Own one? Add it to My Garage and write an owner review with an Owner badge.