Key performance
Technical specifications
Engine
- Displacement
- 625 cc
- Power
- 55.0 ch @ 7000 tr/min (40.5 kW)
- Torque
- 56.9 Nm @ 5500 tr/min
- Engine type
- Monocylindre, 4 temps
- Cooling
- liquide
- Compression ratio
- 11.5 : 1
- Bore × stroke
- 101 x 78 mm
- Valves/cylinder
- 4
- Camshafts
- 1 ACT
Chassis
- Frame
- simple berceau dédoublé en acier
- Gearbox
- boîte à 5 rapports
- Final drive
- Chaîne
- Front suspension
- Fourche téléhydraulique inversée WP Ø 48 mm, déb : 275 mm
- Rear suspension
- Mono-amortisseur WP, déb : 300 mm
Brakes
- Front brakes
- Freinage 1 disque Ø 300 mm, étrier 4 pistons
- Rear brakes
- Freinage 1 disque Ø 220 mm, étrier simple piston
- Front tyre
- 90/90-21
- Rear tyre
- 140/80-18
Dimensions
- Seat height
- 945.00 mm
- Fuel capacity
- 28.00 L
- Dry weight
- 154.00 kg
- New price
- 8 719 €
Overview
Who, in 2002, could claim to take you from Paris to Dakar without flinching, for barely over 150 kg dry? KTM, bolstered by its victories in the dunes, had the answer. The LC4-E 640 Adventure is no adventure bike by accident. It's a machine born from competition, barely civilized for the road, carrying in its DNA the sand, corrugated iron, and broken trails of the African continent.

The 625 cc single-cylinder develops 55 horsepower at 7,000 rpm and 56.9 Nm of torque at 5,500 rpm. On paper, it seems modest for a machine built for wide open spaces. Except that this four-valve single, with its 11.5:1 compression ratio, delivers its power with a frankness that puts a smile on your face. It's not about outright speed—the KTM tops out at 165 km/h—but about availability. The torque comes in low, holds across a wide range, and lets you accelerate effortlessly out of a corner or through a rut. Above all, this Austrian engine kept the weight down to 154 kg dry. In this category, that's a knockout argument against competitors like the BMW F 650 GS Dakar, considerably heavier with its twin-cylinder.
The WP suspension bears the hallmark of the machine's racing DNA. The 48 mm inverted fork offers 275 mm of travel, while the rear mono-shock climbs to 300 mm. These are figures worthy of a rally-raid machine, not a road trail bike. The steel split single-cradle frame absorbs impacts without flinching. The 90/90-21 front and 140/80-18 rear tires confirm the off-road calling. The braking, with a 300 mm disc gripped by a four-piston caliper up front, gets the job done without frills. The 945 mm seat height, however, reserves this KTM for tall riders or those willing to tiptoe. That's the price to pay for such generous suspension travel.
The 28-litre tank is the cornerstone of the concept. With reasonable fuel consumption for a single of this displacement, the range comfortably exceeds 300 kilometres. Add a protective fairing that effectively cuts the wind, a natural standing riding position, and a seat that doesn't torture your backside on long stages, and you get a credible globetrotter. Two panniers, a map, and a visa are all you need to head for the Sahara. On the road, the 640 Adventure proves surprisingly pleasant. Nimble in the city thanks to its featherweight, stable on the motorway despite its off-road vocation, it turns heads with its silhouette of a machine escaped from the bivouac.
At €8,719 in 2002, the price stung a little for a single-cylinder. But the level of equipment, the quality of WP components, and the genuine versatility of the machine justified the investment. This KTM LC4-E 640 Adventure was aimed at travellers who wanted to leave the tarmac without compromise, not at fans of sanitized road trails. A bike with character, physically demanding, but capable of taking you where the others stop.
Practical info
- La moto est accessible aux permis : A
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