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KTM 690 Duke
2008Naked

KTM 690 Duke

Key specifications

Engine
654 cc
Power
64 HP
Torque
67 Nm
Weight
149 kg
Fuel type
petrol
Fuel capacity
3.6 L
Transmission
6-speed
Seat height
34 mm
Front brakes
Single disc
Rear brakes
Single disc

Overview

Introducing the 2008 KTM 690 Duke, a standout in the naked bike category that captures the spirit of urban riding and spirited weekend escapes. KTM, renowned for its commitment to performance and cutting-edge engineering, designed the 690 Duke to cater to riders who crave agility, responsiveness, and an unfiltered connection with the road. With its minimalist styling and aggressive stance, the 690 Duke isn’t just a motorcycle; it’s an invitation to embrace the thrill of the ride while navigating through bustling city streets or winding backroads. At the heart of the 690 Duke lies a 654 ccm single-cylinder, four-stroke engine that packs a punch with 64.36 horsepower at 7,500 RPM and a torque output of 67 Nm at 5,500 RPM. This engine delivers exhilarating acceleration and a spirited performance, allowing riders to seamlessly blend power with control. The 6-speed gearbox enhances the riding experience, providing smooth transitions between gears. Coupled with a lightweight design of just 148.5 kg (327.4 pounds), the Duke boasts an impressive power-to-weight ratio of 0.4334 HP/kg, making it an agile performer that’s perfect for both spirited rides and everyday commuting. KTM has equipped the 690 Duke with a variety of features that enhance its performance and rider comfort. The chromium-molybdenum trellis frame not only contributes to the bike's lightweight nature but also provides exceptional rigidity and handling prowess. The WP suspension components, with 200 mm of front travel and 210 mm in the rear, deliver a smooth ride over various terrains, allowing the rider to tackle corners with confidence. Additionally, the dual Keihin carburetors ensure optimal fuel delivery, while the electric starter simplifies the ignition process, making every ride as effortless as it is exhilarating. **

Pros

  • Exceptional Power-to-Weight Ratio: The lightweight construction combined with powerful engine performance ensures quick acceleration and nimble handling.
  • Agile Handling: The trellis frame and advanced suspension offer excellent stability and responsiveness, making it a joy to ride on twisty roads.
  • Distinctive Design: The minimalist and aggressive aesthetics of the 690 Duke turn heads and reflect its performance-oriented character.

Cons

  • Comfort on Long Rides: The relatively high seat height and firm suspension may not provide the best comfort for extended journeys.
  • Limited Fuel Capacity: With a fuel tank capacity of only 13.5 liters (3.57 gallons), longer rides may require more frequent refueling stops.
  • Single-Cylinder Vibration: The character of the single-cylinder engine can lead to noticeable vibrations, particularly at higher RPMs, which may be less appealing to some riders.

Technical details

Source specification data

Make
KTM
Model
690 Duke
Category
Naked bike
Starter
Electric
Power
64.36 HP (47.0 kW)) @ 7500 RPM
Clutch
APTC Wet multi-disc clutch, operated hydraulically
Torque
67.00 Nm (6.8 kgf-m or 49.4 ft.lbs) @ 5500 RPM
Gearbox
6-speed
Ignition
2 X keihin
Fuel System
Carburettor
Bore X Stroke
102.0 x 80.0 mm (4.0 x 3.1 inches)
Compression
11.8:1
Displacement
654.00 ccm (39.91 cubic inches)
Cooling System
Liquid
Engine Details
Single cylinder, four-stroke
Exhaust System
Stainless steel underfloor silencer with integrated catalytic converter
Lubrication System
Pressure lubrication with 2 Eaton pumps
Valves Per Cylinder
4
Dry Weight
148.5 kg (327.4 pounds)
Seat Height
865 mm (34.1 inches) If adjustable, lowest setting.
Fuel Capacity
13.50 litres (3.57 gallons)
Ground Clearance
155 mm (6.1 inches)
Power Weight Ratio
0.4334 HP/kg
Rear Tyre
160/60-17
Frame Type
Chromium
-
Molybdenum
trellis frame, powder-coated
Front Tyre
120/70-17
Rear Brakes
Single disc
Front Brakes
Single disc
Rear Suspension
WP monoshock
Front Suspension
WP USD
Rear Wheel Travel
210 mm (8.3 inches)
Front Wheel Travel
200 mm (7.9 inches)
Rear Brakes Diameter
220 mm (8.7 inches)
Front Brakes Diameter
320 mm (12.6 inches)