Motocross Bikes
2007KTM 50 SX
34 fields on record
The 2007 KTM 50 SX is a liquid-cooled minibike designed for young riders entering motorsport. Known for its responsive two-stroke engine and nimble handling, it delivers impressive performance in its class with reliable kick-start ignition and adjustable centrifugal clutch for progressive power delivery. Ideal for amateur motocross enthusiasts seeking an entry-level competition bike.
- Capacity
- 49.0 ccm
- Engine
- Single, two-stroke
- Gearbox
- 1-speed
- Dry weight
- 38.8 kg
- Seat height
- 650 mm
- Power
- 5.4 HP (4.0 kW)
What’s new for the 2007 KTM 50 SX
vs the 2006| Spec | 2006 | 2007 |
|---|---|---|
| Front suspension | Marzocchi 32 mm (1.26 inches) | Marzocchi, 23 mm |
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
- 0.1392 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 analogue
- Lubrication system
- 0,15 - 0,2 l Motorex ATF Super
Transmission
- Gearbox
- 1-speed
- Transmission type
- Automatic
- Final drive
- Chain
- Clutch
- Centrifugal clutch, adjustable
Dimensions & weight
- Wheelbase
- 1030 mm
- Seat height
- 650 mm
- Dry weight
- 38.8 kg
- Fuel capacity
- 1.80 litres
- Ground clearance
- 255 mm
Chassis & suspension
- Frame
- Central double-cradle-type frame
- Front suspension
- Marzocchi, 23 mm
- Rear suspension
- WP monoshock
- Front wheel travel
- 115 mm
- Rear wheel travel
- 185 mm
- Rake (fork angle)
- 24.0°
- Trail
- 90 mm
Brakes & wheels
- Front brakes
- Single disc
- Front brakes diameter
- 160 mm
- Rear brakes
- Single disc
- Rear brakes diameter
- 140 mm
- Front tyre
- 2.50-12
- Rear tyre
- 2.75-10
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 | 2007 | 2011 | 2017 | 2022 | 2027 |
|---|---|---|---|---|---|---|
| Capacity | 49 cc | 49 cc | 49 cc | 49 cc | 49 cc | 50 cc |
| Dry weight | 39 kg | 39 kg | 40 kg | 42 kg | 42 kg | 44 kg |
| Seat height | 650 mm | 650 mm | 684 mm | 684 mm | 665 mm | 653 mm |
| Fuel capacity | 1.8 L | 1.8 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 2007 KTM 50 SX has a Capacity of 49.0 ccm (2.99 cubic inches).
What engine power does the KTM 50 SX have?
The 2007 KTM 50 SX has a Power of 5.4 HP (4.0 kW).
How many gears does the KTM 50 SX have?
The 2007 KTM 50 SX has a Gearbox of 1-speed.
How much does the KTM 50 SX weigh?
The 2007 KTM 50 SX has a Dry weight of 38.8 kg (85.5 pounds).
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