The KTM Duke II 640 motorcycle specifications include a 625 cc (38.14 cu in) engine, power of 55 hp (40.1 kW) @ 7,250 rpm, a 5-speed gearbox, and a listed weight of 145 kg (319.7 lb).
Key specifications
How the KTM Duke II 640 compares
This compares the motorcycle with all KTM models in this specifications database. The blue marker is this model and the grey line is the KTM database average.
About 22% lower than the KTM database average. Around the 49th percentile across KTM models.
About 41% higher than the KTM database average. Around the 78th percentile across KTM models.
Very close to the KTM database average. Around the 31st percentile across KTM models.
About 14% larger than the KTM database average. Around the 75th percentile across KTM models.
KTM database percentile rankings
Percentiles show where this motorcycle sits across the KTM specifications database. They are descriptive database rankings, not performance ratings.
55 hp — more powerful than about 49% of KTM models with power data.
625 cc — larger displacement than about 78% of KTM models.
860 mm — taller than about 31% of KTM models.
12 L — larger than about 75% of KTM fuel tanks in this database.
Dimensions compared with KTM average
Each measurement is compared with the average value across KTM models where that dimension is available.
1,460
1,436
Close to average.
860
895
4% below average.
Mechanical overview
Additional useful specifications
| Front tire size | 120/70-HR17 |
|---|---|
| Rear tire size | 160/60-HR17 |
| Power-to-weight ratio | 0.379 hp/kg |
| Power-to-weight | 379.3 hp/tonne |
| Specific power | 88.0 hp/L |
| Bore/stroke ratio | 1.29:1 (Oversquare) |
Model information
| Year released | 2001 |
|---|
Engine specifications
| Engine type | Single cylinder, four-stroke |
|---|---|
| Displacement | 625 cc (38.14 cu in) |
| Power | 55 hp (40.1 kW) @ 7,250 rpm |
| Torque | 58.0 Nm (5.9 kgf-m or 42.8 ft.lbs) @ 5,500 rpm |
| Bore × stroke | 101.0 x 78 mm (4.0 x 3.1 inches) |
| Valves per cylinder | 4 |
| Fuel system | Carburettor |
Transmission and drivetrain
| Gearbox | 5-speed |
|---|---|
| Final drive | Chain (final drive) |
Chassis and suspension
| Front wheel travel | 140 mm (5.5 inches) |
|---|---|
| Rear wheel travel | 170 mm (6.7 inches) |
Brakes, wheels and tires
| Front brakes | Single disc |
|---|---|
| Rear brakes | Single disc |
| Front tire | 120/70-HR17 |
| Rear tire | 160/60-HR17 |
Dimensions and weight
| Dry weight | 145 kg (319.7 lb) |
|---|---|
| Seat height | 860 mm (33.9 inches) |
| Wheelbase | 1,460 mm (57.5 inches) |
Fuel and emissions
| Fuel capacity | 12.00 L (3.17 US gal) |
|---|
Performance
| Top speed | 177.0 km/h (110.0 mph) |
|---|---|
| Power/weight ratio | 0.3793 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 KTM models in this specifications database. Always double-check important specifications against the motorcycle owner’s/service manual and official KTM information before relying on them. Visit the official KTM website.