LC4 640 Enduro

1999 KTM LC4 640 Enduro Technical Analysis & Specification Breakdown

Positioned in KTM's enduro - offroad motorcycle lineup, the 1999 KTM LC4 640 Enduro utilizes a 625 cc (38.1 cu in) liquid-cooled single cylinder, four-stroke layout. In factory specification, peak output is rated at 49 HP (35.8 kW) at 7,500 rpm, transferring power to the rear wheel through a 5-speed gearbox and chain final drive. With a specific output of 78.4 HP per liter, the engine character is indicating a tractable, stress-free state of tune focused on everyday usability and broad torque delivery.

On the scales, the LC4 640 Enduro measures 158 kg (348 lbs) wet (curb), translating to a power-to-weight ratio of 0.31 HP/kg (3.22 kg per horsepower). Rider ergonomics and chassis geometry center around a 930 mm (36.6 in) seat height — reflecting a long-travel chassis stance that favors ground clearance and off-pavement control, combined with a 1,510 mm (59.4 in) wheelbase engineered for balanced agility and highway composure. The 12-liter (3.2 US gal) fuel tank paired with a rated consumption of 6.3 L/100 km provides an estimated theoretical range of roughly 190 km (118 miles) between fill-ups, while factory top speed is listed at 168 km/h (104 mph).