The Kawasaki KX 125 motorcycle specifications include a 124 cc (7.57 cu in) engine, power of 37.8 hp (27.6 kW) @ 11,500 rpm, a 6-speed gearbox, and a listed weight of 86.5 kg (190.7 lb).
Key specifications
1990, 2002, 2004, 2005, 2006Model years
124 ccDisplacement
37.8 hpPower
24.5 Nm @ 10,500 rpmTorque
86.5 kgDry weight
8.5 LFuel tank
1,445 mmWheelbase
93 mmGround clearance
Model years covered
19902002200420052006
Year-specific specification changes
The 1990 model is treated as the standard specification. Only later model years with a different supplied value are shown below.
Bore × stroke
2005200654.0 x 54.5 mm (2.1 x 2.1 inches)
Dry weight
2002200487 kg (191.8 lb)
200587.1 kg (192 lb)
200687 kg (191.8 lb)
Engine type
2006Single cylinder, four-stroke
Front brakes
2005Single disc. Hydraulic.
Front suspension
2005Kayaba 48mm inverted telescopic
2006300 mm
Front tire
200580/90-M21
200680/100-M21
Fuel system
2005Carburettor. Mikuni TMX38x
Power
200239.7 hp (29.0 kW)
200640.5 hp (29.6 kW)
Rear brakes
2005Single disc. Hydraulic.
Rear suspension
2005UNI-TRAK® swingarm, single shock
2006310 mm
Torque
200426.5 Nm (2.7 kgf-m or 19.5 ft.lbs)
200626.5 Nm (2.7 kgf-m or 19.5 ft.lbs) @ 2,700 rpm
Wheelbase
20051,471 mm (57.9 inches)
20061,470 mm (57.9 inches)
Front wheel travel
2005300 mm (11.8 inches)
2006275 mm (10.8 inches)
Fuel capacity
20058.32 L (2.20 US gal)
20068.20 L (2.17 US gal)
Overall height
200520061,265 mm (49.8 inches)
Overall length
20062,165 mm (85.2 inches)
Power/weight ratio
20020.4563 hp/kg
20040.4713 hp/kg
20060.4654 hp/kg
Rear wheel travel
2005310 mm (12.2 inches)
2006275 mm (10.8 inches)
How the Kawasaki KX 125 compares
This compares the motorcycle with all Kawasaki models in this specifications database. The blue marker is this model and the grey line is the Kawasaki database average.
Engine power37.8 hp
Low 10 hpAverage 73.9 hpHigh 203.3 hp
About 49% lower than the Kawasaki database average. Around the 25th percentile across Kawasaki models.
Displacement124 cc
Low 84 ccAverage 687 ccHigh 1,700 cc
About 82% lower than the Kawasaki database average. Around the 8th percentile across Kawasaki models.
Fuel capacity8.5 L
Low 3.8 LAverage 15.3 LHigh 24 L
About 44% smaller than the Kawasaki database average. Around the 18th percentile across Kawasaki models.
This model Kawasaki database average
Mechanical overview
Engine layout snapshot
Single cylinder, two-stroke • 124 cc • 37.8 hp
Chassis snapshot
Wheelbase 1,445 mmClearance 93 mm
6-speed • 80/100-21 51 front / 100/90-19 57 rear
Additional useful specifications
| Front tire size |
80/100-21 51 |
| Rear tire size |
100/90-19 57 |
| Front tire width |
80 mm |
| Front tire aspect ratio |
100% |
| Front rim diameter |
21 in |
| Rear tire width |
100 mm |
| Rear tire aspect ratio |
90% |
| Rear rim diameter |
19 in |
| Power-to-weight ratio |
0.437 hp/kg |
| Power-to-weight |
437.0 hp/tonne |
| Specific power |
304.8 hp/L |
| Bore/stroke ratio |
1.11:1 (Oversquare) |
Engine specifications
| Engine type |
Single cylinder, two-stroke |
| Displacement |
124 cc (7.57 cu in) |
| Power |
37.8 hp (27.6 kW) @ 11,500 rpm |
| Torque |
24.5 Nm (2.5 kgf-m or 18.1 ft.lbs) @ 10,500 rpm |
| Bore × stroke |
56.0 x 50.6 mm (2.2 x 2.0 inches) |
| Compression ratio |
8.2:1 |
| Fuel system |
Carburettor |
| Ignition |
CDI |
| Starter |
Kick |
| Lubrication |
Petrol Mix (32:1) |
Transmission and drivetrain
Chassis and suspension
| Front suspension |
Inverted Forks |
| Rear suspension |
Monoshock |
| Front wheel travel |
310 mm (12.2 inches) |
| Rear wheel travel |
330 mm (13.0 inches) |
| Rake |
25.5° |
| Trail |
108 mm (4.3 inches) |
Brakes, wheels and tires
| Front brakes |
Single disc |
| Rear brakes |
Single disc |
| Front tire |
80/100-21 51 |
| Rear tire |
100/90-19 57 |
Dimensions and weight
| Dry weight |
86.5 kg (190.7 lb) |
| Overall length |
2,135 mm (84.1 inches) |
| Overall width |
815 mm (32.1 inches) |
| Overall height |
1,215 mm (47.8 inches) |
| Wheelbase |
1,445 mm (56.9 inches) |
| Ground clearance |
93 mm (3.7 inches) |
Fuel and emissions
| Fuel capacity |
8.50 L (2.25 US gal) |
Performance
| Power/weight ratio |
0.4370 hp/kg |
Disclaimer: Specifications may vary by market, trim, production date and optional equipment, and scraped or historical data can contain errors. Comparison and percentile values are calculated from Kawasaki models in this specifications database. Always double-check important specifications against the motorcycle owner’s/service manual and official Kawasaki information before relying on them. Visit the official Kawasaki website.