Motocross Bikes
2018KTM 50 SX Mini
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The 2018 KTM 50 SX Mini is a lightweight minibike designed for young riders and beginners learning fundamental motorcycle skills. Known for its compact dimensions, responsive handling, and aggressive styling, this entry-level machine combines KTM's racing heritage with accessible performance. Its low seat height and minimal weight make it ideal for building confidence before progressing to larger bikes.
- Capacity
- 49.0 ccm
- Engine
- Single, two-stroke
- Gearbox
- 1-speed
- Dry weight
- 40.0 kg
- Seat height
- 558 mm
- Power
- 5.4 HP (4.0 kW)
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- It exists purely to teach small children the basics of throttle control, balance, and off-road riding on a real motocross-style bike in a safe, controlled way.
- Built for
- It behaves like a proper miniature motocrosser, with real suspension, a real frame, and real brakes, giving a authentic but gentle introduction to dirt bike riding.
- Not ideal for
- It is completely unsuitable for adults, teenagers, road use, touring, or any rider who has outgrown beginner-level youth motocross machines.
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
- 0.1350 HP/kg
- Bore x stroke
- 39.5 x 40.0 mm
- Cooling system
- Liquid
- Fuel system
- Carburettor
- Starting
- Kick
- Ignition
- Seletra 2p D36
- Lubrication system
- Mixture oil lubrication
Transmission
- Gearbox
- 1-speed
- Transmission type
- Manual
- Final drive
- Chain
- Clutch
- Centrifugal clutch (adjustable)
Dimensions & weight
- Wheelbase
- 1032 mm
- Seat height
- 558 mm
- Dry weight
- 40.0 kg
- Fuel capacity
- 2.30 litres
- Ground clearance
- 184 mm
Chassis & suspension
- Frame
- Central-tube frame with double-cradle
- Front suspension
- WP upside-down Ø 35 mm
- Rear suspension
- WP shock absorber
- Front wheel travel
- 100 mm
- Rear wheel travel
- 147 mm
- Rake (fork angle)
- 24.0°
Brakes & wheels
- Front brakes
- Single disc
- Front brakes diameter
- 160 mm
- Rear brakes
- Single disc
- Rear brakes diameter
- 160 mm
Other
- Color options
- Orange/white/black
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 | 2012 | 2015 | 2018 | 2021 | 2024 |
|---|---|---|---|---|---|
| Capacity | 49.00 ccm (2.99 cubic inches) | 49.00 ccm (2.99 cubic inches) | 49.00 ccm (2.99 cubic inches) | 49.8 ccm (3.04 cubic inches) | 49.8 ccm (3.04 cubic inches) |
| Dry weight | 40.5 kg (89.3 pounds) | 39.0 kg (86.0 pounds) | 40.0 kg (88.2 pounds) | 40.0 kg (88.2 pounds) | 40.0 kg (88.2 pounds) |
| Seat height | 558 mm (22.0 inches) | 558 mm (22.0 inches) | 558 mm (22.0 inches) | 558 mm (22.0 inches) | 558 mm (22.0 inches) |
| Fuel capacity | 2.00 litres (0.53 gallons) | 2.00 litres (0.53 gallons) | 2.30 litres (0.61 gallons) | 2.10 litres (0.55 US gallons) | 2.30 litres (0.61 US gallons) |
| Color options | Orange/black/white | Orange/black/white | Orange/white/black | White/orange/black | White/orange/grey |
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 KTM 50 SX Mini?
The 2018 KTM 50 SX Mini has a Capacity of 49.0 ccm (2.99 cubic inches).
What engine power does the KTM 50 SX Mini have?
The 2018 KTM 50 SX Mini has a Power of 5.4 HP (4.0 kW).
How many gears does the KTM 50 SX Mini have?
The 2018 KTM 50 SX Mini has a Gearbox of 1-speed.
How much does the KTM 50 SX Mini weigh?
The 2018 KTM 50 SX Mini has a Dry weight of 40.0 kg (88.2 pounds).
Shop this bike
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The 2018 KTM 50 SX Mini is a fantastic motorcycle for young riders who are just starting out in the world of motocross. This bike is designed specifically for kids, with a lightweight frame and a low seat height that makes it easy for young riders to handle. The automatic transmission and power-adjustable brakes also help to make the 2018 KTM 50 SX Mini a great choice for beginners.
In addition to being easy to handle, the 2018 KTM 50 SX Mini also offers impressive performance on the track. The bike's two-stroke engine delivers plenty of power, and its high-quality suspension system helps to smooth out rough terrain. With its race-inspired design and top-notch build quality, the 2018 KTM 50 SX Mini is a great option for young riders who want to start their motocross journey off on the right foot.
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