Motocross Bikes
2008KTM 50 SX
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The 2008 KTM 50 SX is a liquid-cooled minibike designed for young riders entering motocross. Powered by a nimble 49cc two-stroke engine with automatic transmission, it delivers responsive handling and manageable power ideal for developing skills on the track. Known for its reliability and competitive pedigree, the 50 SX remains a popular choice for junior racers.
- Capacity
- 49.0 ccm
- Engine
- Single, two-stroke
- Gearbox
- 1-speed
- Dry weight
- 38.8 kg
- Seat height
- 660 mm
- Power
- 5.4 HP (4.0 kW)
What’s new for the 2008 KTM 50 SX
vs the 2007| Spec | 2007 | 2008 |
|---|---|---|
| Seat height | 650 mm (25.6 inches) | 660 mm (26.0 inches) |
| Front suspension | Marzocchi, 23 mm | Marzocchi 32 mm (1.26 |
| Front brakes | Single disc | Single disc. Bremo |
| Rear brakes | Single disc | Single disc. Bremo |
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
- Mixture lubrication 1:60
Transmission
- Gearbox
- 1-speed
- Transmission type
- Automatic
- Final drive
- Chain
- Clutch
- Centrifugal clutch (adjustable)
Dimensions & weight
- Wheelbase
- 1030 mm
- Seat height
- 660 mm
- Dry weight
- 38.8 kg
- Fuel capacity
- 1.80 litres
- Ground clearance
- 255 mm
Chassis & suspension
- Frame
- Double grinded central double-cradle-type frame
- Front suspension
- Marzocchi 32 mm (1.26
- Rear suspension
- WP monoshock
- Front wheel travel
- 120 mm
- Rear wheel travel
- 125 mm
- Rake (fork angle)
- 24.0°
- Trail
- 90 mm
Brakes & wheels
- Front brakes
- Single disc. Bremo
- Front brakes diameter
- 160 mm
- Rear brakes
- Single disc. Bremo
- 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 | 2008 | 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 | 660 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 2008 KTM 50 SX has a Capacity of 49.0 ccm (2.99 cubic inches).
What engine power does the KTM 50 SX have?
The 2008 KTM 50 SX has a Power of 5.4 HP (4.0 kW).
How many gears does the KTM 50 SX have?
The 2008 KTM 50 SX has a Gearbox of 1-speed.
How much does the KTM 50 SX weigh?
The 2008 KTM 50 SX has a Dry weight of 38.8 kg (85.5 pounds).
Shop this bike
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The 2008 KTM 50 SX is a powerful and reliable motocross bike that is perfect for young riders looking to hone their skills on the track. With a lightweight frame and a 2-stroke engine, this bike offers excellent handling and acceleration, making it easy for young riders to maneuver through tight corners and navigate obstacles. The adjustable suspension allows for a smooth ride over rough terrain, while the brakes provide confident stopping power when needed. Overall, the 2008 KTM 50 SX is a top choice for young riders who want a high-performance motocross bike that can keep up with their skills.
In conclusion, the 2008 KTM 50 SX is a fantastic option for young riders looking to break into the world of motocross. Its lightweight design, powerful engine, and adjustable suspension make it a top choice for young riders who want to take their skills to the next level. Whether navigating through tight corners or tackling rough terrain, this bike offers the performance and reliability that young riders need to improve their skills on the track.
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