Motocross Bikes
2020Thumpstar MX 50 SR
22 fields on record
The 2020 Thumpstar MX 50 SR is an entry-level pit bike designed for young riders and beginners learning off-road skills. Known for its lightweight frame, responsive USD front forks, and compact dimensions, it delivers nimble handling and easy maneuverability on dirt tracks. Its affordability and simplicity make it an ideal starter motorcycle for recreational riding and amateur racing.
- Capacity
- 49.0 ccm
- Engine
- Single, two-stroke
- Gearbox
- Not on record
Know it? Add it → - Dry weight
- 41.5 kg
- Seat height
- 684 mm
- Power
- 5.4 HP (4.0 kW)
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- Built for casual backyard and light trail riding on a small two-stroke minibike rather than any serious racing or transportation use.
- Built for
- A simple, low-powered two-stroke minibike with basic drum brakes and a kick starter that favors playful, low-stakes fun over performance.
- Not ideal for
- It is not suitable for taller or heavier adult riders, highway use, touring, or anyone seeking meaningful speed or long-distance comfort.
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
- 49.0 ccm
- Power
- 5.4 HP (4.0 kW)
- Engine type
- Single, two-stroke
- Power/weight ratio
- 0.1301 HP/kg (dry)
- Fuel system
- Carburettor
- Starting
- Kick
Transmission
- Clutch
- Centrifugal
Dimensions & weight
- Wheelbase
- 1032 mm
- Seat height
- 684 mm
- Dry weight
- 41.5 kg
- Fuel capacity
- 2.30 litres
- Ground clearance
- 252 mm
Chassis & suspension
- Frame
- Central-Tube Frame with Double-Cradle
- Front suspension
- USD fork
- Rear suspension
- VS 1 Shock Absorber
Brakes & wheels
- Front brakes
- Expanding brake (drum brake)
- Front brakes diameter
- 160 mm
- Rear brakes
- Expanding brake (drum brake)
- Front tyre
- 2.50-10
- Rear tyre
- 2.5-10
Other
- Color options
- Green/Black
Compiled from manufacturer documentation and user contributions, corrected on an ongoing basis. Spotted something wrong? Tell us.
Rider Reviews
Common questions
What is the engine size of the Thumpstar MX 50 SR?
The 2020 Thumpstar MX 50 SR has a Capacity of 49.0 ccm (2.99 cubic inches).
What engine power does the Thumpstar MX 50 SR have?
The 2020 Thumpstar MX 50 SR has a Power of 5.4 HP (4.0 kW).
How much does the Thumpstar MX 50 SR weigh?
The 2020 Thumpstar MX 50 SR has a Dry weight of 41.5 kg (91.5 pounds).
Shop this bike
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The 2020 Thumpstar MX 50 SR motorcycle is a excellent choice for beginners and experienced riders alike. Its powerful 50cc engine provides plenty of speed and acceleration, making it the perfect bike for off-road adventures. With its sturdy and durable frame, this motorcycle can handle rough terrain with ease, giving riders the confidence to push their limits.
In addition, the Thumpstar MX 50 SR features a comfortable and ergonomic design, allowing for hours of riding without discomfort. Its responsive handling and smooth suspension make it a joy to ride, and its affordable price point makes it a great option for riders on a budget. Overall, the 2020 Thumpstar MX 50 SR is a fantastic motorcycle that delivers on both performance and value.
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