KTM 640 Duke
2003Super Moto

KTM 640 Duke

Key specifications

Engine
625 cc
Power
55 HP
Torque
60 Nm
Weight
149 kg
Fuel type
petrol
Fuel capacity
3.2 L
Transmission
5-speed
Seat height
35 mm
Front brakes
Single disc
Rear brakes
Single disc

Overview

Introducing the 2003 KTM 640 Duke, a quintessential super motard that masterfully blends agility, power, and style. This bike stands out in the crowded marketplace for its unique combination of off-road prowess and street-savvy performance. As KTM’s foray into the super motard segment, the Duke embodies the spirit of adventure and the thrill of urban riding, making it a favorite for both seasoned riders and newcomers looking to experience the raw energy of a single-cylinder motorcycle. At the heart of the 640 Duke lies a robust 625cc single-cylinder, four-stroke engine, delivering an exhilarating 54.8 horsepower at a lively 7500 RPM. This power is complemented by a meaty torque of 60 Nm available at 5500 RPM, providing riders with the kind of punch that makes quick accelerations feel effortless. The engine's 11.5:1 compression ratio and four-valve setup ensure smooth power delivery and impressive throttle response. The combination of a 5-speed gearbox and a chain final drive means that the Duke is not just about raw power; it also offers a thrilling experience through city streets and winding country roads alike. The 2003 Duke is equipped with advanced features that enhance both performance and comfort. It sports a WP-USD 43 MA front suspension that boasts 140mm of travel, allowing it to soak up bumps and potholes with ease, while the rear WP-Monoshock suspension provides an additional 170mm of travel for an exceptionally smooth ride. Stopping power comes from a 320mm front disc and a 220mm rear disc, ensuring that this bike can handle whatever the road throws its way. With a weight of just 149 kg and a ground clearance of 270mm, the Duke is nimble and responsive, ready to tackle both urban environments and off-road trails. In summary, the 2003 KTM 640 Duke is a motorcycle that embodies the essence of super motard riding. With its powerful engine, agile handling, and distinctive design, it remains a beloved choice for enthusiasts who crave a bike that can deliver both excitement and practicality. Whether navigating city streets or exploring backroads, the 640 Duke promises an unforgettable ride.

Pros

  • Lightweight & Agile: At only 149 kg, the 640 Duke offers exceptional maneuverability, making it perfect for city riding and tight corners.
  • Powerful Engine: The single-cylinder engine delivers impressive torque and horsepower, providing a thrilling riding experience.
  • Versatile Suspension: With advanced WP suspension components, the Duke offers excellent handling and comfort on various terrains.

Cons

  • Limited Fuel Capacity: The 12-liter tank may require more frequent fuel stops on longer rides.
  • Seat Height: At 900mm, the seat height may be a challenge for shorter riders, potentially affecting comfort and control.
  • Single-Cylinder Vibration: While it enhances character, the single-cylinder engine can produce noticeable vibrations at higher RPMs, which might not appeal to everyone.

Technical details

Source specification data

Make
KTM
Model
640 Duke
Category
Super motard
Power
54.80 HP (40.0 kW)) @ 7500 RPM
Torque
60.00 Nm (6.1 kgf-m or 44.3 ft.lbs) @ 5500 RPM
Gearbox
5-speed
Fuel System
Carburettor
Bore X Stroke
101.0 x 78.0 mm (4.0 x 3.1 inches)
Compression
11.5:1
Displacement
625.00 ccm (38.14 cubic inches)
Cooling System
Liquid
Engine Details
Single cylinder, four-stroke
Valves Per Cylinder
4
Transmission Type Final Drive
Chain
Dry Weight
149.0 kg (328.5 pounds)
Seat Height
900 mm (35.4 inches) If adjustable, lowest setting.
Fuel Capacity
12.00 litres (3.17 gallons)
Ground Clearance
270 mm (10.6 inches)
Power Weight Ratio
0.3678 HP/kg
Reserve Fuel Capacity
2.50 litres (0.66 gallons)
Rear Tyre
160/70-17
Front Tyre
120/70-17
Rear Brakes
Single disc
Front Brakes
Single disc
Rear Suspension
WP - Monoshock
Front Suspension
WP-USD 43 MA
Rear Wheel Travel
170 mm (6.7 inches)
Front Wheel Travel
140 mm (5.5 inches)
Rear Brakes Diameter
220 mm (8.7 inches)
Front Brakes Diameter
320 mm (12.6 inches)