The KTM 640 Duke motorcycle specifications include a 625 cc (38.14 cu in) engine, power of 54.8 hp (40.0 kW) @ 7,500 rpm, a 5-speed gearbox, and a listed weight of 149 kg (328.5 lb).
Key specifications
How the KTM 640 Duke 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 48th 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 42nd 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.
54.8 hp — more powerful than about 48% of KTM models with power data.
625 cc — larger displacement than about 78% of KTM models.
900 mm — taller than about 42% 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.
900
895
Close to average.
270
304
11% below average.
Mechanical overview
Additional useful specifications
| Front tire size | 120/70-17 |
|---|---|
| Rear tire size | 160/70-17 |
| Front tire width | 120 mm |
| Front tire aspect ratio | 70% |
| Front rim diameter | 17 in |
| Rear tire width | 160 mm |
| Rear tire aspect ratio | 70% |
| Rear rim diameter | 17 in |
| Power-to-weight ratio | 0.368 hp/kg |
| Power-to-weight | 367.8 hp/tonne |
| Specific power | 87.7 hp/L |
| Bore/stroke ratio | 1.29:1 (Oversquare) |
Model information
| Year released | 2003 |
|---|---|
| Category | Super motard |
Engine specifications
| Engine type | Single cylinder, four-stroke |
|---|---|
| Displacement | 625 cc (38.14 cu in) |
| Power | 54.8 hp (40.0 kW) @ 7,500 rpm |
| Torque | 60.0 Nm (6.1 kgf-m or 44.3 ft.lbs) @ 5,500 rpm |
| Bore × stroke | 101.0 x 78 mm (4.0 x 3.1 inches) |
| Compression ratio | 11.5:1 |
| Valves per cylinder | 4 |
| Cooling system | Liquid |
| Fuel system | Carburettor |
Transmission and drivetrain
| Gearbox | 5-speed |
|---|---|
| Final drive | Chain (final drive) |
Chassis and suspension
| Front suspension | WP-USD 43 MA |
|---|---|
| Rear suspension | WP – Monoshock |
| 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 | 120/70-17 |
| Rear tire | 160/70-17 |
Dimensions and weight
| Dry weight | 149 kg (328.5 lb) |
|---|---|
| Seat height | 900 mm (35.4 inches) |
| Wheelbase | 1,460 mm (57.5 inches) |
| Ground clearance | 270 mm (10.6 inches) |
Fuel and emissions
| Fuel capacity | 12.00 L (3.17 US gal) |
|---|---|
| Reserve fuel capacity | 2.50 L (0.66 US gal) |
Performance
| Power/weight ratio | 0.3678 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.