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

KTM 640 LC4 Adventure

Key specifications

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

Overview

Introducing the 2005 KTM 640 LC4 Adventure, a rugged and versatile enduro-offroad motorcycle that embodies KTM's commitment to adventure and exploration. This model stands as a beacon for riders seeking an exhilarating blend of on-road capability and off-road prowess. With its powerful single-cylinder engine and lightweight design, the 640 LC4 Adventure is engineered for those who crave the thrill of the wild, making it an ideal choice for both seasoned adventurers and those new to the enduro scene. At the heart of this beast lies a robust 625cc single-cylinder, four-stroke engine, delivering an impressive 53.64 horsepower at 7,000 RPM and a torque of 55 Nm at 5,500 RPM. The engine's compression ratio of 11.7:1, combined with a sophisticated Mikuni BST 40 carburettor fuel system, ensures that the 640 LC4 Adventure provides exhilarating acceleration and responsive power across various terrains. Riders will appreciate the smooth shifting of the 5-speed gearbox, which is complemented by a wet multi-disc hydraulic clutch, allowing for seamless gear transitions whether you're climbing rocky trails or cruising down highways. The 640 LC4 Adventure is not just about power; it also boasts a host of features that enhance its riding experience. The frame is constructed from durable chromium-molybdenum and is power-coated for added resilience. The advanced WP suspension system, featuring 48 mm USD forks in the front and a monoshock in the rear, offers 335 mm of rear travel, effectively soaking up bumps and obstacles on rugged trails. With a ground clearance of 315 mm, this bike can tackle uneven landscapes with ease. Safety is paramount, as evidenced by its double disc front brakes and single disc rear brakes, ensuring reliable stopping power on any surface. The 2005 KTM 640 LC4 Adventure is truly a motorcycle built for the thrill-seekers and off-road enthusiasts. With its strong performance, innovative design, and adventure-ready features, it remains a compelling choice for riders looking to conquer the great outdoors.

Pros

  • Exceptional Off-Road Capability: The combination of a powerful engine and advanced suspension allows for superior handling and performance on rugged terrains.
  • Lightweight Design: Weighing in at just 158 kg (348.3 lbs), the 640 LC4 Adventure is agile and easy to maneuver, making it perfect for both technical trails and everyday commuting.
  • Dual Starting Options: With both electric and kick-start capabilities, riders have the flexibility to start the bike in various situations, ensuring you're always ready for the next adventure.

Cons

  • Seat Height: At 945 mm, the seat height may be a challenge for shorter riders, potentially affecting comfort and control.
  • Limited Fuel Range: Although the 25.5-litre fuel tank is generous, the bike's power may lead to decreased range on long rides, necessitating regular fuel stops.
  • Vibration at Higher Speeds: While the single-cylinder engine provides great torque, it can lead to noticeable vibrations at higher speeds, which may detract from long-distance comfort.

Technical details

Source specification data

Make
KTM
Model
640 LC4 Adventure
Category
Enduro-offroad
Starter
Electric & kick
Power
53.64 HP (39.2 kW)) @ 7000 RPM
Clutch
Wet multi-disc clutch, operated hydraulically
Torque
55.00 Nm (5.6 kgf-m or 40.6 ft.lbs) @ 5500 RPM
Gearbox
5-speed
Ignition
Kokusan DC-CDI
Fuel System
Carburettor. Mikuni BST 40
Bore X Stroke
101.0 x 78.0 mm (4.0 x 3.1 inches)
Compression
11.7:1
Displacement
625.00 ccm (38.14 cubic inches)
Cooling System
Liquid
Engine Details
Single cylinder, four-stroke
Lubrication System
Pressure lubrication with 2 Eaton pumps
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
25.50 litres (6.74 gallons)
Overall Width
640 mm (25.2 inches)
Overall Height
640 mm (25.2 inches)
Ground Clearance
315 mm (12.4 inches)
Power Weight Ratio
0.3395 HP/kg
Rake
27.5°
Trail
124 mm (4.9 inches)
Frame Type
Chromium-molybdenum, power-coated
Front Tyre
90/90-21
Rear Brakes
Single disc
Front Brakes
Double disc
Rear Suspension
WP - Monoshock
Front Suspension
WP-USD 48 mm
Rear Wheel Travel
335 mm (13.2 inches)
Rear Brakes Diameter
220 mm (8.7 inches)
Front Brakes Diameter
300 mm (11.8 inches)