KTM 640 LC4 Supermoto (2003-04)

The KTM 640 LC4 Supermoto was available from 2003 to 2004 and had a four-stroke, single-cylinder engine with 624.6cc capacity and a compression ratio of 11.0:1. The ignition system was contactless DC-CDI with a digital advanced system and the battery was a 12V 8Ah maintenance-free one. The motorcycle had a kick and electric starting option and could generate a maximum power of 35.7 kW at 7500 rpm and a maximum torque of 52 Nm at 5500 rpm. It had a wet and multiplate clutch and a 5-speed transmission with claw shifting. The chain 5/8 x 1/4″ O-ring was used for the final drive. The motorcycle’s frame was designed with central chrome-moly-steel and the front suspension had 43mm WP upside-down forks, which provided a 270mm wheel travel. The rear suspension had a central shock absorber with PRO-LEVER linkage to rear-swingarm with needle bearing and it provided a 300 mm wheel travel. The front brake was a single 320 mm disc and the rear brake was a single 220 mm disc. The motorcycle’s steering head angle was 62.5o and the wheelbase was 1510 mm. It had a ground clearance of 335 mm, a seat height of 915 mm and a dry weight of 137 kg. The motorcycle could carry a GVWR of 350 kg and had a fuel capacity of 11 L, with a fuel reserve of 2.5 L.

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Technical specifications:

Make Model: KTM 640 LC4 Supermoto

Year: 2003 – 04

Engine: Four stroke, single Cylinder. SOHC, 4 Valve per cylinder,

Capacity: 624.6 cc / 38.1 cu in

Bore x Stroke: 101 x 78 mm

Compression Ratio: 11.0:1

Cooling System: Liquid cooled

Induction: Mikuni BST 40

Ignition: Contactless DC-CDI ignition with digital advanced system, KOKUSAN

Spark Plug: NGK DPR8 EA-9

Battery: 12V 8Ah, maintenance free

Starting: Kick & electric

Max Power: 35.7 kW / 49 hp @ 7500 rpm

Max Torque: 52 Nm / 5.3 kgf-m / 38.4 lb-ft @ 5500 rpm

Clutch: Wet, multiplate

Transmission: 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 Ratio: 17:42

Final Drive: Chain 5/8 x 1/4″ O-ring

Frame: Central chrome-moly-steel frame

Front Suspension: 43 mm WP upside-down forks

Front Wheel Travel: 270 mm / 10.6 in

Rear Suspension: Central shock absorber (WP) with PRO-LEVER linkage to rear-swingarm with needle bearing

Rear Wheel Travel: 300 mm / 11.8 in

Front Brakes: Single 320 mm disc, 4piston floating caliper

Rear Brakes: Single 220 mm disc, 1 piston floating caliper

Front Tyre: 120/70 – 17

Rear Tyre: 160/60 – 17

Steering Head Angle: 62.5o

Wheelbase: 1510 mm / 59.4 in

Ground Clearance: 335 mm / 13.2 in

Seat Height: 915 mm / 36.0 in

Dry Weight: 137 kg / 302 lbs

GVWR: 350 kg / 773 lbs

Fuel Capacity: 11 L / 2.9 US gal / 2.4 Imp gal

Fuel Reserve: 2.5 L / 2.6 US qt / 2.2 Imp qt