Motocross Bikes
2006KTM 125 SX
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The 2006 KTM 125 SX is a lightweight motocross bike engineered for junior riders and beginners seeking competitive performance on the track. Its 124cc liquid-cooled two-stroke engine delivers responsive power with minimal weight at 92.4kg, making it ideal for developing riding skills. The 125 SX became KTM's benchmark junior motocross platform, renowned for agility and reliability in youth racing series worldwide.
- Capacity
- 124.8 ccm
- Engine
- Single, two-stroke
- Gearbox
- 6-speed
- Dry weight
- 92.4 kg
- Seat height
- 925 mm
- Power
- 15.0 HP (11.0 kW)
What’s new for the 2006 KTM 125 SX
vs the 2005| Spec | 2005 | 2006 |
|---|---|---|
| Front suspension | WP-USD 48 mm (1.89 inch.) | WP-USD 48 mm (1.89 inches) |
| Rear suspension | WP-PDS-DA shock absorber | WP-PDS shock absorber |
Other years
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2025
2026
2027
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- Built purely for closed-course motocross racing, it excels at jumps, berms, and rapid direction changes on dirt tracks rather than any street use.
- Built for
- Light, explosive, and razor-sharp in handling, it rewards aggressive riding with a peaky two-stroke power band and minimal weight to manage.
- Not ideal for
- It is not suitable for commuting, highway travel, passengers, or riders seeking comfort, storage, or a forgiving low-end power delivery.
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
- 124.8 ccm
- Power
- 15.0 HP (11.0 kW)
- Engine type
- Single, two-stroke
- Power/weight ratio
- 0.1623 HP/kg (dry)
- Bore x stroke
- 54.0 x 54.5 mm
- Cooling system
- Liquid
- Fuel system
- Carburettor
- Starting
- Kick
- Ignition
- Kokusan digital 2K-1
- Lubrication system
- Mixture oil lubrication 1:40
Transmission
- Gearbox
- 6-speed
- Transmission type
- Manual
- Final drive
- Chain
- Clutch
- Wet multi-disc clutch, operated hydraulically
Dimensions & weight
- Wheelbase
- 1471 mm
- Seat height
- 925 mm
- Dry weight
- 92.4 kg
- Fuel capacity
- 7.50 litres
- Ground clearance
- 390 mm
Chassis & suspension
- Frame
- Central double-cradle-type 25 CrMo4
- Front suspension
- WP-USD 48 mm (1.89 inches)
- Rear suspension
- WP-PDS shock absorber
- Front wheel travel
- 300 mm
- Rear wheel travel
- 335 mm
- Rake (fork angle)
- 27.0°
- Trail
- 120 mm
Brakes & wheels
- Front brakes
- Single disc
- Front brakes diameter
- 260 mm
- Rear brakes
- Single disc
- Rear brakes diameter
- 220 mm
- Front tyre
- 80/100-21
- Rear tyre
- 100/90-19
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 | 2003 | 2006 | 2009 | 2015 | 2020 | 2027 |
|---|---|---|---|---|---|---|
| Capacity | 125 cc | 125 cc | 125 cc | 125 cc | 125 cc | 125 cc |
| Dry weight | 94 kg | 92 kg | 91 kg | 91 kg | 88 kg | 92 kg |
| Seat height | 925 mm | 925 mm | 985 mm | 992 mm | 950 mm | 958 mm |
| Fuel capacity | 7.5 L | 7.5 L | 8 L | 7.5 L | 7.5 L | 7.2 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 125 SX?
The 2006 KTM 125 SX has a Capacity of 124.8 ccm (7.62 cubic inches).
What engine power does the KTM 125 SX have?
The 2006 KTM 125 SX has a Power of 15.0 HP (11.0 kW).
How many gears does the KTM 125 SX have?
The 2006 KTM 125 SX has a Gearbox of 6-speed.
How much does the KTM 125 SX weigh?
The 2006 KTM 125 SX has a Dry weight of 92.4 kg (203.7 pounds).
Shop this bike
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The 2006 KTM 125 SX is a high-performance motocross bike that is perfect for riders who want to experience the thrill of off-road racing. With its powerful 125cc engine and lightweight frame, this bike delivers impressive speed and agility on the track. The suspension system is also top-notch, providing excellent handling and control over rough terrain. Overall, the 2006 KTM 125 SX is a fantastic choice for riders who are serious about motocross and are looking for a bike that can keep up with their demands.
In conclusion, the 2006 KTM 125 SX is a top-of-the-line motocross bike that offers exceptional performance and handling. Its powerful engine, lightweight frame, and advanced suspension system make it a formidable contender on the track. Whether you're a seasoned rider or just starting out in the world of motocross, the 2006 KTM 125 SX is a bike that is sure to impress.
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