Minibikes
2020Cobra CX50 JR
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The 2020 Cobra CX50 JR is a competition minicycle designed for the youngest motocross racers. Its liquid-cooled 50cc two-stroke single drives the rear wheel through an automatic single-speed transmission. A 607 mm seat and 36.7 kg dry weight make it small and manageable.
- Capacity
- 50.0 ccm
- Engine
- Single, two-stroke
- Gearbox
- 1-speed
- Dry weight
- 36.7 kg
- Seat height
- 607 mm
- Power
- 5.4 HP (4.0 kW)
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- It's a pint-sized cross/minibike designed for motocross-style practice tracks and off-road play rather than any road use.
- Built for
- Playful, nimble, and toy-like in scale, yet fitted with genuinely serious adjustable suspension and disc brakes for real off-road performance.
- Not ideal for
- This is not suitable for adult riders, highway travel, passengers, or anyone seeking speed, comfort, or long-distance capability.
Scores are derived from the spec sheet using the same model across every bike, so they compare like for like.
Engine
- Capacity
- 50.0 ccm
- Power
- 5.4 HP (4.0 kW)
- Engine type
- Single, two-stroke
- Power/weight ratio
- 0.1471 HP/kg (dry)
- Bore x stroke
- 39.0 x 41.7 mm
- Cooling system
- Liquid
- Fuel system
- Carburettor
- Starting
- Kick
- Lubrication system
- Mixture lubrication
Transmission
- Gearbox
- 1-speed
- Transmission type
- Manual
- Final drive
- Chain
- Clutch
- Cobra 3Gx 3-Shoe
Dimensions & weight
- Wheelbase
- 908 mm
- Seat height
- 607 mm
- Dry weight
- 36.7 kg
- Fuel capacity
- 2.60 litres
- Ground clearance
- 216 mm
Chassis & suspension
- Frame
- Double Cradle 4130 CrMo steel
- Front suspension
- CARD 30mm USD
- Rear suspension
- CARD Adjustable Piggyback
- Front wheel travel
- 170 mm
- Rear wheel travel
- 170 mm
Brakes & wheels
- Front brakes
- Single disc
- Front brakes diameter
- 160 mm
- Rear brakes
- Single disc
- Rear brakes diameter
- 140 mm
- Front tyre
- 60/100-10
- Rear tyre
- 70/100-10
Other
- Color options
- Yellow/red/gray
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 | 2009 | 2013 | 2017 | 2020 | 2024 |
|---|---|---|---|---|---|
| Capacity | 50 cc | 50 cc | 50 cc | 50 cc | 50 cc |
| Dry weight | 37 kg | 37 kg | 37 kg | 37 kg | 37 kg |
| Seat height | 607 mm | 607 mm | 607 mm | 607 mm | 607 mm |
| Fuel capacity | — | 2.6 L | 2.6 L | 2.6 L | 2.6 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 Cobra CX50 JR?
The 2020 Cobra CX50 JR has a Capacity of 50.0 ccm (3.05 cubic inches).
What engine power does the Cobra CX50 JR have?
The 2020 Cobra CX50 JR has a Power of 5.4 HP (4.0 kW).
How many gears does the Cobra CX50 JR have?
The 2020 Cobra CX50 JR has a Gearbox of 1-speed.
How much does the Cobra CX50 JR weigh?
The 2020 Cobra CX50 JR has a Dry weight of 36.7 kg (80.9 pounds).
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