Minibikes
2024Thumpstar TSX 50 JR
23 fields on record
The 2024 Thumpstar TSX 50 JR is a lightweight minibike designed for young riders and beginners seeking entry-level off-road capability. Powered by a nimble 50cc two-stroke engine with automatic transmission and liquid cooling, it delivers accessible performance with a top speed of 70 km/h. Known for its adjustable Fastace suspension and affordability, the TSX 50 JR excels as a fun, manageable platform for learning fundamental dirt bike skills.
- Capacity
- 50.0 ccm
- Engine
- Single, two-stroke
- Gearbox
- Not on record
Know it? Add it → - Wet weight
- 45.0 kg
- Seat height
- 603 mm
- Power
- 5.4 HP (4.0 kW)
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- Built purely for casual backyard and off-road play riding on a small scale, not for serious racing or transportation.
- Built for
- A lightweight, nimble little cross-style minibike with adjustable suspension that rewards playful, low-speed maneuvering.
- Not ideal for
- This bike is not suitable for highway use, adult-sized riders, carrying passengers, or any kind of long-distance touring.
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
- 0.1200 HP/kg (wet)
- Cooling system
- Liquid
- Fuel system
- Carburettor
- Starting
- Kick
Transmission
- Transmission type
- Automatic
Performance
- Top speed
- 70.0 km/h (43.5 mph)
Dimensions & weight
- Wheelbase
- 953 mm
- Seat height
- 603 mm
- Wet weight
- 45.0 kg
- Fuel capacity
- 1.30 litres
Chassis & suspension
- Front suspension
- Fastace Adjustable Forks
- Rear suspension
- Fastace Adjustable Shock
Brakes & wheels
- Front brakes
- Single disc. 2-piston calipers
- Front brakes diameter
- 190 mm
- Rear brakes
- Single disc
- Front tyre
- 2.50-10
- Rear tyre
- 2.5-10
Other
- Color options
- Green/black/red
- Comments
- Chines bike sold in Australia.
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 | 2023 | 2024 | 2025 | 2026 |
|---|---|---|---|---|
| Capacity | 50 cc | 50 cc | 50 cc | 50 cc |
| Seat height | 603 mm | 603 mm | 603 mm | 603 mm |
| Fuel capacity | 1.3 L | 1.3 L | 1.3 L | 1.3 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 Thumpstar TSX 50 JR?
The 2024 Thumpstar TSX 50 JR has a Capacity of 50.0 ccm (3.05 cubic inches).
What engine power does the Thumpstar TSX 50 JR have?
The 2024 Thumpstar TSX 50 JR has a Power of 5.4 HP (4.0 kW).
How much does the Thumpstar TSX 50 JR weigh?
The 2024 Thumpstar TSX 50 JR has a Wet weight of 45.0 kg (99.2 pounds).
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