What category is the 2003 KTM 640 LC4 Adventure?

The 2003 KTM 640 LC4 Adventure has a Category of Enduro / offroad.

What is the engine size of the 2003 KTM 640 LC4 Adventure?

The 2003 KTM 640 LC4 Adventure has a Capacity: of 625.00 ccm (38.14 cubic inches).

What type of engine does the 2003 KTM 640 LC4 Adventure have?

The 2003 KTM 640 LC4 Adventure has a Engine type of Single cylinder.

What is the engine power of the 2003 KTM 640 LC4 Adventure?

The 2003 KTM 640 LC4 Adventure has a Power of 54.80.

What is the torque of the 2003 KTM 640 LC4 Adventure?

The 2003 KTM 640 LC4 Adventure has a Torque of 55.00.

Is the 2003 KTM 640 LC4 Adventure air cooled or liquid cooled?

The 2003 KTM 640 LC4 Adventure has a Cooling system of Liquid.

How many gears does the 2003 KTM 640 LC4 Adventure have?

The 2003 KTM 640 LC4 Adventure has a Gearbox of 5-speed.

How much does the 2003 KTM 640 LC4 Adventure weigh?

The 2003 KTM 640 LC4 Adventure has a Dry weight of 158.0 kg (348.3 pounds).

What is the seat height of the 2003 KTM 640 LC4 Adventure?

The 2003 KTM 640 LC4 Adventure has a Seat height of 945 mm (37.2 inches) If adjustable, lowest setting..

KTM 640 LC4 Adventure - 2003 Specifications and Reviews

Name: 2003 KTM 640 LC4 Adventure
Brand: KTM

The 2003 KTM 640 LC4 Adventure is a capable single-cylinder enduro bike built for serious off-road exploration and adventure touring. Its torquey 625cc liquid-cooled engine delivers strong low-end power ideal for technical terrain and long-distance travel. Best known for reliability and versatility, it suits riders seeking genuine dual-sport capability with minimal road-biased compromise.

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General information
Category	Enduro / offroad
Year	2003
Model	KTM 640 LC4 Adventure
Engine and Transmission Specifications
Transmission typefinal drive	Chain
Gearbox	5-speed
Cooling system	Liquid
Valves per cylinder	4
Fuel system	Carburettor
Bore x stroke	101.0 x 78.0 mm (4.0 x 3.1 inches)
Compression	11.5:1
Torque	55.00
Power	54.80
Stroke	4
Engine type	Single cylinder
Capacity:	625.00 ccm (38.14 cubic inches)
Physical measures and capacities
Wheelbase	1,510 mm (59.4 inches)
Ground clearance	315 mm (12.4 inches)
Seat height	945 mm (37.2 inches) If adjustable, lowest setting.
Dry weight	158.0 kg (348.3 pounds)

KTM 640 LC4 Adventure dimensions and frame
Rear brakes diameter	220 mm (8.7 inches)
Rear brakes	Single disc
Front brakes diameter	320 mm (12.6 inches)
Front brakes	Single disc
Rear tyre dimensions	140/80-18
Front tyre dimensions	90/90-21
Rear suspension travel	320 mm (12.6 inches)
Rear suspension	WP - Monoshock
Front suspension travel	270 mm (10.6 inches)
Front suspension	WP-USD 43 MA
Speed and acceleration
Power/weight ratio	0.3468 HP/kg

Other specs
Maintenance	Find parts, fluids, filters, maintenance tools and service items on eBay
Reserve fuel capacity	3.50 litres (0.92 gallons)
Fuel capacity	28.00 litres (7.40 gallons)

Performance Profile & Rider Fit

53.6 hp

Peak Power

5.8s

0-60 mph

Best For

Track25%

City45%

Cornering60%

Daily Riding50%

Touring65%

Passenger35%

Rider Profile

Best For	Best suited to intermediate-to-experienced riders comfortable with a tall, top-heavy single-cylinder adventure bike.
Purpose	A big-bore dual-sport built for long-distance off-road adventure riding and rugged terrain exploration with light touring capability.
Rider Fit	The tall 945mm seat height and 158kg dry weight demand decent rider height and strength, especially in technical off-road situations.
Character	A torquey, characterful thumper that rewards riders who enjoy raw mechanical feel over refinement and outright speed.
Not Ideal For	Not ideal for shorter riders, pure pavement commuters, or anyone seeking smooth multi-cylinder refinement and high top-end power.

Character map is an editorial estimate based on this bike's specifications, not a lab-tested measurement.

Rider Fit Visualizer

2003 KTM 640 LC4 Adventure Rider Ergonomics Assessment

Your height

Inseam (optional)

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Feet:

At 945mm, a rider of 175cm with a 79cm (estimated) inseam will reach the ground with cannot reach comfortably on the 2003 KTM 640 LC4 Adventure, with a cramped knee angle of around 85 degrees and an upright riding position.

Data quality: measured. Assumes about 30mm of suspension sag once seated (a typical street-bike rule of thumb - stiffer or softer suspension will vary). This is an approximation from category-typical geometry and generic body proportions, not a measurement of this specific bike or you - sit on it before you buy.

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