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Motocross Bikes

2009Rieju MX Disc 50

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The 2009 Rieju MX Disc 50 is a small motocross-style minibike from the Spanish brand Rieju. Its air-cooled 50cc two-stroke single drives an automatic transmission and chain. A low 740 mm seat and just 46 kg dry weight make it ideal for children learning to ride off-road.

Capacity
50.0 ccm
Engine
Single, two-stroke
Gearbox
Not on record
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Dry weight
46.0 kg
Seat height
740 mm
Power
5.4 HP (4.0 kW)
⇄ Compare with another bike + Add to garage All model years
Other years 2008 2009 2010

How it rides

Editorial estimate from the spec sheet - not lab tested
Speed 9Agility 79Comfort 20Off-road 55Touring 5Road manners 10
Off-road & trail55%
Cornering30%
City riding10%
Daily riding5%
Touring5%
Two-up0%
Track15%
Best for
It exists to teach fundamentals of off-road riding and balance in a low-power, low-risk package rather than to perform any serious sporting or commuting role.
Built for
It has a playful, toy-like personality with automatic transmission simplicity, light steering, and negligible top speed, prioritizing fun over performance.
Not ideal for
It is not suitable for adult riders seeking real off-road performance, highway travel, or any kind of touring or passenger use.

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 us
At 740mm, a rider of 175cm with a 79cm (estimated) inseam will reach the ground with both feet flat on the 2009 Rieju MX Disc 50, with a cramped knee angle of around 60 degrees and an upright riding position.

Assumes about 30mm of suspension sag once seated. This is an approximation from category-typical geometry, not a measurement of this bike or of you - sit on one before you buy.

More bikes at 750 mm or under — Short Kings →

Find bikes that fit your height →

Full specifications

Engine
Capacity
50.0 ccm
Power
5.4 HP (4.0 kW)
Engine type
Single, two-stroke
Power/weight ratio
0.1174 HP/kg (dry)
Bore x stroke
39.0 x 41.8 mm
Cooling system
Air
Fuel system
Carburettor
Starting
Kick
Transmission
Transmission type
Automatic
Final drive
Chain
Dimensions & weight
Wheelbase
1100 mm
Overall length
1596 mm
Overall width
685 mm
Overall height
995 mm
Seat height
740 mm
Dry weight
46.0 kg
Fuel capacity
2.50 litres
Ground clearance
Not on record - add it
Chassis & suspension
Frame
Double cradle steel tube
Front suspension
Hydraulic telescopic fork of 36mm.
Rear suspension
Mono-shock shock absorber
Brakes & wheels
Front brakes
Single disc
Front brakes diameter
145 mm
Rear brakes
Single disc
Rear brakes diameter
145 mm
Front tyre
2.50-15
Rear tyre
2.50-15

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 200820092010
Capacity 50 cc 50 cc 50 cc
Dry weight 46 kg 46 kg 46 kg
Seat height 740 mm 740 mm 740 mm
Fuel capacity 2.5 L 2.5 L 2.5 L

Illustrative - generated automatically by diffing the year records already on file, not a manufacturer-published changelog.

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Common questions

What is the engine size of the Rieju MX Disc 50?

The 2009 Rieju MX Disc 50 has a Capacity of 50.0 ccm (3.05 cubic inches).

What engine power does the Rieju MX Disc 50 have?

The 2009 Rieju MX Disc 50 has a Power of 5.4 HP (4.0 kW).

How much does the Rieju MX Disc 50 weigh?

The 2009 Rieju MX Disc 50 has a Dry weight of 46.0 kg (101.4 pounds).

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