Back to Bike FinderYears: 2005 · 2004 · 2003
KTM 640 LC4 Adventure
2003Off-road

KTM 640 LC4 Adventure

Key specifications

Engine
625 cc
Power
55 HP
Torque
55 Nm
Weight
158 kg
Fuel type
petrol
Fuel capacity
7.4 L
Transmission
5-speed
Seat height
37 mm
Front brakes
Single disc
Rear brakes
Single disc

Overview

Introducing the 2003 KTM 640 LC4 Adventure, a motorcycle that embodies the spirit of rugged exploration and off-road prowess. Positioned within the Enduro-offroad category, this bike is not just a machine; it's a ticket to adventure, whether you're traversing rocky mountain trails or cruising through remote landscapes. KTM has long been synonymous with adventure biking, and the 640 LC4 Adventure epitomizes this ethos, delivering a perfect blend of power, agility, and durability. With its striking design and signature orange livery, this bike commands attention and respect on any terrain. At the heart of the KTM 640 LC4 Adventure lies a robust 625cc single-cylinder, four-stroke engine that churns out an exhilarating 54.80 horsepower at 7,000 RPM and a formidable torque of 55.00 Nm at 5,500 RPM. This impressive power-to-weight ratio, at 0.3468 HP/kg, translates to thrilling acceleration and responsiveness, making every twist of the throttle a rush of excitement. The liquid-cooled engine is paired with a 5-speed gearbox and a reliable chain final drive, ensuring smooth gear transitions and optimal performance on diverse terrains. Whether you're climbing steep inclines or navigating challenging descents, the 640 LC4 Adventure delivers a thrilling riding experience that will keep you coming back for more. KTM has equipped the 640 LC4 Adventure with a host of features designed to enhance both comfort and performance. The bike boasts a durable WP-USD 43 MA front suspension with an impressive travel of 270 mm, coupled with a WP Monoshock rear suspension offering 320 mm of travel. This suspension setup not only absorbs bumps with ease but also contributes to the bike’s excellent handling characteristics. The robust braking system, featuring a 320 mm single disc up front and a 220 mm disc at the rear, provides reliable stopping power, instilling confidence in both hard and technical braking situations. With a fuel capacity of 28 liters, the KTM is built for the adventurous rider, allowing for longer excursions without frequent stops. **

Pros

  • Powerful Engine Performance: The single-cylinder, four-stroke engine provides excellent torque and acceleration, making it ideal for off-road adventures.
  • Robust Suspension: With long travel suspension at both ends, the bike excels in absorbing rough terrain, enhancing rider comfort and control.
  • Adventure-Ready Design: The large fuel tank and high ground clearance make it perfect for long-distance rides and tackling challenging trails.

Cons

  • Seat Height: At 945 mm, the seat height may be challenging for shorter riders to manage comfortably.
  • Weight: Weighing in at 158 kg (348.3 lbs), it may feel cumbersome for those not accustomed to handling heavier off-road bikes.
  • Basic Fuel System: The carburettor fuel system, while reliable, may not offer the same efficiency and performance as modern fuel-injected systems.

Technical details

Source specification data

Make
KTM
Model
640 LC4 Adventure
Category
Enduro-offroad
Power
54.80 HP (40.0 kW)) @ 7000 RPM
Torque
55.00 Nm (5.6 kgf-m or 40.6 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
158.0 kg (348.3 pounds)
Seat Height
945 mm (37.2 inches) If adjustable, lowest setting.
Fuel Capacity
28.00 litres (7.40 gallons)
Ground Clearance
315 mm (12.4 inches)
Power Weight Ratio
0.3468 HP/kg
Reserve Fuel Capacity
3.50 litres (0.92 gallons)
Rear Tyre
140/80-18
Front Tyre
90/90-21
Rear Brakes
Single disc
Front Brakes
Single disc
Rear Suspension
WP - Monoshock
Front Suspension
WP-USD 43 MA
Rear Wheel Travel
320 mm (12.6 inches)
Front Wheel Travel
270 mm (10.6 inches)
Rear Brakes Diameter
220 mm (8.7 inches)
Front Brakes Diameter
320 mm (12.6 inches)