Motocross Bikes
2019KTM 50 SX
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The 2019 KTM 50 SX is a lightweight entry-level motocross bike engineered for young riders and beginners seeking competitive off-road performance. Known for its aggressive styling, responsive handling, and quality WP suspension, it delivers the durability and capability needed for serious youth racing. The compact frame and low seat height make it accessible for smaller riders while maintaining genuine dirt bike credentials.
- Capacity
- 49.0 ccm
- Engine
- Single, two-stroke
- Gearbox
- 1-speed
- Dry weight
- 41.5 kg
- Seat height
- 684 mm
- Power
- 5.4 HP (4.0 kW)
Other years
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- It exists purely to teach a child the fundamentals of balance, throttle control, and off-road riding in a safe, low-powered package.
- Built for
- It behaves like a purpose-built miniature dirt bike, docile and forgiving with an automatic single-speed gearbox that removes clutch and shifting complexity so a child can focus on riding.
- Not ideal for
- It is not suitable for adults, taller teens, road use, touring, or anyone seeking real speed or highway capability.
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)
- Bore x stroke
- 39.5 x 40.0 mm
- Compression
- 12.5:1
- 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
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
- WP upside-down Ø 35 mm
- Rear suspension
- WP shock absorber
- Front wheel travel
- 205 mm
- Rear wheel travel
- 185 mm
- Rake (fork angle)
- 24.0°
- Trail
- 90 mm
Brakes & wheels
- Front brakes
- Single disc. Four-piston calipers.
- Front brakes diameter
- 160 mm
- Rear brakes
- Single disc. Two-piston calipers.
- Rear brakes diameter
- 160 mm
- Front tyre
- 60/100-12
- Rear tyre
- 2.75-10
Other
- Color options
- Orange/white/black
- Comments
- The engine power can be restricted to 5.5 hp with a kit.
Specs last verified against published sources: .
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 | 2006 | 2011 | 2017 | 2019 | 2022 | 2027 |
|---|---|---|---|---|---|---|
| Capacity | 49 cc | 49 cc | 49 cc | 49 cc | 49 cc | 50 cc |
| Dry weight | 39 kg | 40 kg | 42 kg | 42 kg | 42 kg | 44 kg |
| Seat height | 650 mm | 684 mm | 684 mm | 684 mm | 665 mm | 653 mm |
| Fuel capacity | 1.8 L | 2.3 L | 2.3 L | 2.3 L | 2.3 L | 2.3 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 KTM 50 SX?
The 2019 KTM 50 SX has a Capacity of 49.0 ccm (2.99 cubic inches).
What engine power does the KTM 50 SX have?
The 2019 KTM 50 SX has a Power of 5.4 HP (4.0 kW).
How many gears does the KTM 50 SX have?
The 2019 KTM 50 SX has a Gearbox of 1-speed.
How much does the KTM 50 SX weigh?
The 2019 KTM 50 SX has a Dry weight of 41.5 kg (91.5 pounds).
Shop this bike
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The 2019 KTM 50 SX is a powerful and reliable motorcycle that delivers an exhilarating riding experience for both beginners and experienced riders. With its lightweight frame and high-performance engine, this bike offers impressive speed and agility on the trails. The adjustable suspension and high-quality components make for a smooth and comfortable ride, while the responsive brakes and intuitive handling provide precision control for riders of all skill levels. Whether you're hitting the track or exploring off-road terrain, the KTM 50 SX delivers top-notch performance and exceptional durability.
In addition to its impressive performance capabilities, the 2019 KTM 50 SX also stands out for its sleek and modern design. The striking orange frame and bodywork make a bold statement, while the ergonomic seat and ergonomic controls ensure optimal comfort and maneuverability. With its advanced technology and rugged construction, this bike is a top choice for riders seeking a thrilling and reliable motorcycle for their adventures. Whether you're a competitive racer or a casual rider, the 2019 KTM 50 SX is a standout choice for anyone in search of a high-quality and high-performance motorcycle.
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