Minibikes

2023Thumpstar TSX 50 JR

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The 2023 Thumpstar TSX 50 JR is a lightweight minibike designed for young and beginner riders seeking an affordable entry into off-road riding. Powered by a 50cc two-stroke engine with automatic transmission and liquid cooling, it delivers responsive performance with a top speed of 70 km/h. Known for its adjustable Fastace suspension and nimble handling, this bike excels in teaching fundamental riding skills on varied terrain.

Capacity: 50.0 ccm
Engine: Single, two-stroke
Gearbox: Not on record
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Wet weight: 45.0 kg
Seat height: 603 mm
Power: 5.4 HP (4.0 kW)

⇄ Compare with another bike ＋ Add to garage All model years

Other years 2023 2024 2025 2026

How it rides

Editorial estimate from the spec sheet - not lab tested

Off-road & trail65%

Cornering55%

City riding10%

Daily riding10%

Touring5%

Two-up0%

Track40%

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.

Full specifications

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

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MotorcycleDB

I recently had the opportunity to test ride the 2023 Thumpstar TSX 50 JR and I was thoroughly impressed. This junior motocross bike is perfect for young riders looking to get into the sport. It's lightweight and nimble, making it easy for beginners to handle. The powerful 50cc engine provides plenty of thrills without being overwhelming for less experienced riders. The TSX 50 JR also has a durable frame and quality components, ensuring that it can handle the rigors of off-road riding. Overall, I think the 2023 Thumpstar TSX 50 JR is a fantastic option for young riders wanting to start their motocross journey.

If you're in the market for a junior motocross bike, the 2023 Thumpstar TSX 50 JR is definitely worth considering. It's a well-built and reliable option that can provide hours of fun for young riders. The 50cc engine delivers plenty of power, while the lightweight design makes it easy to handle for beginners. With its durable construction and quality components, the TSX 50 JR is sure to provide years of enjoyment for aspiring motocross riders. Overall, I highly recommend the 2023 Thumpstar TSX 50 JR for anyone looking to get their kid started in the sport.

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