KTM 640 LC4 Adventure (2006 - 2007)

The KTM 640 LC4 Adventure is a masterclass in motorcycle design, where versatility and agility come together in perfect harmony. Powered by a potent 625cc single-cylinder engine, this bike is a joy to ride, with a riding position tailored specifically for medium-sized riders. The four-stroke motor delivers a deep exhaust note, a subtle hint at the rpms building up.

Whether tackling steep hills, navigating rivers, or spreading dirt, the 640 Adventure’s 52 horsepower at 7000 rpm is more than sufficient to handle even the most demanding off-road excursions. This is thanks in part to the engine’s tractable power delivery, courtesy of a 55 Nm torque output at 5500 rpm.

The WP front and rear suspension units are more than up to the task, providing the necessary support to navigate even the most challenging terrain. And when the road calls, the bike’s agility and light handling make it a thrill to ride. With its perfect balance of power, agility, and suspension, the KTM 640 LC4 Adventure is an off-road motorcycle that truly shines.

Key Specifications

Engine Type	Four stroke, single Cylinder. SOHC, 4 Valve per cylinder
Engine Capacity	624.6 cc / 38.1 cu in
Max Power	35.7 kw / 49 hp
Max Torque	52 Nm / 5.3 kgf-m / 38.4 lb-ft @ 5500 rpm
Fuel Tank Capacity	7.4 US gallons / 28.0 L
Seat Height	37.2 inches / 945 mm

*n/a – information not provided by manufacturer

All Specifications

Make & Model

Model	KTM 640 LC4 Adventure
Year	2006 – 2007

Engine

Engine Type	Four stroke, single Cylinder. SOHC, 4 Valve per cylinder
Displacement	624.6 cc / 38.1 cu in
Bore x Stroke	101 x 78 mm
Compression Ratio	11.0:1
Max Horsepower	35.7 kw / 49 hp
Max Torque	52 Nm / 5.3 kgf-m / 38.4 lb-ft @ 5500 rpm
Engine Management System	Mikuni BST 40
Cooling System	Liquid cooled

Performance

Top Speed

n/a

*n/a – information not provided by manufacturer

Transmission

Clutch	Wet, multiplate
Gearbox	5 Speed, claw shifted
Primary Drive Ratio	30:81
Gear Ratios	1st 14:35 / 2nd 15:24 / 3rd 18:21 / 4th 20:19 / 5th 22:18
Final Drive	Chain

Electrical & Electronics System

Battery	12V 8Ah, maintenance free
Starter	Kick & electric

Chassis & Suspension

Frame Type	Central chrome-moly-steel frame
Front Suspension	50 mm WP upside-down forks
Rear Suspension	WP monoshock
Trail	62.5o

Wheels & Brakes

Front Tire Size	90/90 – 21 54S Enduro 3
Rear Tire Size	140/80 – 18 70R Enduro 3
Front Brakes	2X 300mm sisc
Rear Brakes	Single 220mm disc, 1 piston floating caliper

Dimension & Weights

Seat Height	37.2 inches / 945 mm
Wheelbase	59.4 inches / 1510 mm
Ground Clearance	320 mm / 12.6 in
Fuel Tank Capacity	7.4 US gallons / 28.0 L
Dry Weight	158.0 kg / 348.3 lbs

Features

625cc single-cylinder engine
LC4 engine with four-stroke design
52 horsepower at 7000 rpm
55 Nm torque at 5500 rpm
Rear and front WP suspension units
Performance Brembo brakes with two 300mm discs at front and single 220mm disc at rear
Clutch feel is firm and precise
Throttle response is smooth and reassuring
Rider position is perfect for medium-sized riders
Deep exhaust note makes rider aware of RPM level
Engine is powerful for off-road use, including climbing steep hills and passing through rivers
Engine provides tractable power in all situations
Front wheel lift is possible with sudden throttle input
Bike is easy to ride on and off-road
Suspension can handle deep mud and jumps
Brakes are efficient and confident-inspiring on normal use
Brakes can be used aggressively without fading
Bike is smooth and stable at high speeds (up to 80mph)

*We strive to provide the most comprehensive and accurate specifications possible. However, certain details may not be available if the manufacturer did not disclose them or if the information is no longer publicly accessible. If you find any discrepancy with any data on this site, please feel free to let us know at contact@throttlecraze.com