Motocross Bikes
2016KTM 125 SX
31 fields on record
The 2016 KTM 125 SX is a lightweight two-stroke motocross bike designed for young riders and beginners entering competitive off-road racing. Known for its responsive handling and agile performance, the 125cc machine delivers sharp acceleration with minimal weight, making it ideal for learning fundamental motocross skills on tight tracks and technical terrain.
- Capacity
- 124.8 ccm
- Engine
- Single, two-stroke
- Gearbox
- 6-speed
- Dry weight
- 87.8 kg
- Seat height
- 960 mm
- Power
- 15.0 HP (11.0 kW)
What’s new for the 2016 KTM 125 SX
vs the 2015| Spec | 2015 | 2016 |
|---|---|---|
| Dry weight | 90.8 kg (200.2 pounds) | 87.8 kg (193.6 pounds) |
| Seat height | 992 mm (39.1 inches) | 960 mm (37.8 inches) |
| Fuel capacity | 7.50 litres (1.98 US gallons) | 7.00 litres (1.85 US gallons) |
| Front suspension | WP Suspension Up Side Down 4860 MXMA CC | WP-USD, AER 48, Ø 48 mm |
| Rear suspension | WP Suspension 5018 BAVP DCC | WP shock absorber with linkage |
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
- 0.1708 HP/kg (dry)
- Bore x stroke
- 54.0 x 54.5 mm
- Cooling system
- Liquid
- Fuel system
- Carburettor
- Starting
- Kick
- Ignition
- Contactless, controlled, fully electronic ignition system with digital ignition timing adjustment, type Kokusan
Transmission
- Gearbox
- 6-speed
- Transmission type
- Manual
- Final drive
- Chain
- Clutch
- Multi-plate clutch, Brembo hydraulics
Dimensions & weight
- Wheelbase
- 1485 mm
- Seat height
- 960 mm
- Dry weight
- 87.8 kg
- Fuel capacity
- 7.00 litres
- Ground clearance
- 375 mm
Chassis & suspension
- Frame
- Chrome-molybdenum steel central-tube frame
- Front suspension
- WP-USD, AER 48, Ø 48 mm
- Rear suspension
- WP shock absorber with linkage
- Front wheel travel
- 300 mm
- Rear wheel travel
- 300 mm
- Rake (fork angle)
- 26.5°
- Trail
- 120 mm
Brakes & wheels
- Front brakes
- Single disc. Brake calipers on floating bearings
- Front brakes diameter
- 260 mm
- Rear brakes
- Single disc. Brake calipers on floating bearings
- Rear brakes diameter
- 220 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 | 2003 | 2009 | 2015 | 2016 | 2020 | 2027 |
|---|---|---|---|---|---|---|
| Capacity | 125 cc | 125 cc | 125 cc | 125 cc | 125 cc | 125 cc |
| Dry weight | 94 kg | 91 kg | 91 kg | 88 kg | 88 kg | 92 kg |
| Seat height | 925 mm | 985 mm | 992 mm | 960 mm | 950 mm | 958 mm |
| Fuel capacity | 7.5 L | 8 L | 7.5 L | 7 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 2016 KTM 125 SX has a Capacity of 124.8 ccm (7.62 cubic inches).
What engine power does the KTM 125 SX have?
The 2016 KTM 125 SX has a Power of 15.0 HP (11.0 kW).
How many gears does the KTM 125 SX have?
The 2016 KTM 125 SX has a Gearbox of 6-speed.
How much does the KTM 125 SX weigh?
The 2016 KTM 125 SX has a Dry weight of 87.8 kg (193.6 pounds).
Shop this bike
Affiliate linksWe may earn a commission from qualifying eBay or Amazon purchases made through these links. As an Amazon Associate I earn from qualifying purchases.
Please log in or register if you'd like to leave a comment.
Own one? Add it to My Garage and write an owner review with an Owner badge.