KTM 640 LC4Supermoto (2003 – 2004)

KTM 640 LC4Supermoto (2003 - 2004)

The KTM 640 LC4 Supermoto is a masterclass in versatility and performance. This Austrian-built marvel boasts a 640cc LC4 engine, delivering a potent 62 horsepower and 40 lb-ft of torque. The engine’s character is unmistakably KTM, with a smooth, linear power delivery that belies its substantial output.

The LC4’s parallel-twin configuration provides a unique blend of low-end grunt and high-rpm enthusiasm, making it equally at home on the twisties or in the city.

Whether carving up mountain roads or navigating urban canyons, the 640 LC4 Supermoto’s lightweight aluminum chassis and long-travel suspension ensure a responsive, predictable ride that’s as much fun as it is rewarding.

The 640 LC4 Supermoto is the perfect blend of style, substance, and pure, unadulterated riding joy – and it’s an experience you’ll want to repeat time and time again.

Key Specifications

Engine TypeFour stroke, single Cylinder. SOHC, 4 Valve per cylinder,
Engine Capacity624.6 cc / 38.1 cu in
Max Power35.7 kw / 49 hp
Max Torque52 Nm / 5.3 kgf-m / 38.4 lb-ft @ 5500 rpm
Fuel Tank Capacity11L / 2.9 US gal / 2.4 Imp gal
Seat Height36.0 inches / 915 mm
KTM 640 LC4Supermoto (2003 - 2004)

All Specifications

Make & Model

ModelKTM 640 LC4Supermoto
Year2003 – 2004

Engine

Engine TypeFour stroke, single Cylinder. SOHC, 4 Valve per cylinder,
Displacement624.6 cc / 38.1 cu in
Bore x Stroke101 x 78 mm
Compression Ratio11.0:1
Max Horsepower35.7 kw / 49 hp
Max Torque52 Nm / 5.3 kgf-m / 38.4 lb-ft @ 5500 rpm
Engine Management SystemMikuni BST 40
Cooling SystemLiquid cooled

Performance

Top Speedn/a

Transmission

ClutchWet, multiplate
Gearbox5 Speed, claw shifted
Primary Drive Ratio30:81
Gear Ratios1st 14:35 / 2nd 15:24 / 3rd 18:21 / 4th 20:19 / 5th 22:18
Final DriveChain 5/8 x 1/4″ O-ring

Electrical & Electronics System

Battery12V 8Ah, maintenance free
StarterKick & electric

Chassis & Suspension

Frame TypeCentral chrome-moly-steel frame
Front Suspension43mm WP upside-down forks
Rear SuspensionCentral shock absorber (WP) with PRO-LEVER linkage to rear-swingarm with needle bearing
Trail62.5o

Wheels & Brakes

Front Tire Size120/70 – 17
Rear Tire Size160/60 – 17
Front BrakesSingle 320 mm disc, 4piston floating caliper
Rear BrakesSingle 220 mm disc, 1 piston floating caliper

Dimension & Weights

Seat Height36.0 inches / 915 mm
Wheelbase59.4 inches / 1510 mm
Ground Clearance335 mm / 13.2 in
Fuel Tank Capacity11L / 2.9 US gal / 2.4 Imp gal
Dry Weight137 kg / 302 lbs
KTM 640 LC4Supermoto (2003 - 2004)

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