Motocross Bikes
2003Kawasaki KX125
27 fields on record
The 2003 Kawasaki KX125 is a two-stroke motocross bike from the early 2000s. Its liquid-cooled 124cc single makes 39.7 hp through a six-speed gearbox and chain. A tall 945 mm seat, 87 kg dry weight and 8.4-litre tank make it light and lively on the track.
- Capacity
- 124.0 ccm
- Engine
- Single, two-stroke
- Gearbox
- 6-speed
- Dry weight
- 87.0 kg
- Seat height
- 945 mm
- Power
- 39.7 HP (29.2 kW)
What’s new for the 2003 Kawasaki KX125
vs the 2002| Spec | 2002 | 2003 |
|---|---|---|
| Front suspension | Inverted Forks | not listed |
| Rear suspension | Monoshock | not listed |
| Compression | 8.2:1 | not listed |
Other years
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
How it rides
Editorial estimate from the spec sheet - not lab tested- Best for
- Built purely as a competition motocross machine for racing on dirt tracks, not as a street or all-purpose bike.
- Built for
- A raw, high-strung racing tool that rewards aggressive riding with sharp handling and explosive acceleration out of corners.
- Not ideal for
- Not suitable for commuting, touring, passengers, or riders seeking comfort, low seat height, or road-legal usability.
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
- 124.0 ccm
- Power
- 39.7 HP (29.2 kW)
- Engine type
- Single, two-stroke
- Power/weight ratio
- 0.4563 HP/kg (dry)
- Cooling system
- Liquid
- Fuel system
- Carburettor
- Starting
- Kick
- Lubrication system
- Petrol Mix (32:1)
Transmission
- Gearbox
- 6-speed
- Transmission type
- Manual
- Final drive
- Chain
Dimensions & weight
- Wheelbase
- 1458 mm
- Overall length
- 2150 mm
- Overall width
- 828 mm
- Overall height
- 1240 mm
- Seat height
- 945 mm
- Dry weight
- 87.0 kg
- Fuel capacity
- 8.40 litres
- Ground clearance
- 340 mm
Chassis & suspension
- Frame
- Perimeter style, high-tensile steel with aluminum subframe
- Front wheel travel
- 305 mm
- Trail
- 111 mm
Brakes & wheels
- Front brakes
- Single disc
- Front brakes diameter
- 220 mm
- Rear brakes
- Single disc
- Rear brakes diameter
- 190 mm
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 | 1990 | 1995 | 2000 | 2003 | 2004 | 2009 |
|---|---|---|---|---|---|---|
| Capacity | 124 cc | 124 cc | 124 cc | 124 cc | 124 cc | 124 cc |
| Dry weight | 87 kg | 87 kg | 87 kg | 87 kg | 87 kg | — |
| Seat height | 945 mm | 945 mm | 945 mm | 945 mm | 945 mm | 945 mm |
| Fuel capacity | 8.5 L | 8.5 L | 8.5 L | 8.4 L | 8.4 L | 8.2 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 Kawasaki KX125?
The 2003 Kawasaki KX125 has a Capacity of 124.0 ccm (7.57 cubic inches).
What engine power does the Kawasaki KX125 have?
The 2003 Kawasaki KX125 has a Power of 39.7 HP (29.2 kW).
How many gears does the Kawasaki KX125 have?
The 2003 Kawasaki KX125 has a Gearbox of 6-speed.
How much does the Kawasaki KX125 weigh?
The 2003 Kawasaki KX125 has a Dry weight of 87.0 kg (191.8 pounds).
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