KTM 640 LC4Enduro (2005 – 2007)

KTM 640 LC4Enduro (2005 - 2007)

The KTM 640 LC4 Enduro is a testament to the brand’s dedication to creating versatile and thrilling motorcycles. Powered by a four-stroke, single-cylinder engine with SOHC and 4 valves, this bike boasts a unique blend of on-road and off-road capabilities. With a history dating back to 1987, the LC4 has undergone numerous refinements, including the addition of electric start, counterbalancers, and a high-flow head.

The bike’s appearance is deceptively understated, with styling cues reminiscent of modern dirt bikes. However, once astride, the 640’s considerable weight and unique ergonomics become apparent. The engine’s exhaust note is unexpectedly muted, but its notorious vibration is still a characteristic of this bike. As the bike has broken in, the vibration has become less pronounced, and I’ve grown accustomed to its presence.

On the open road, the LC4 Enduro is smooth and comfortable up to 120 km/h, but the combination of wind and vibration becomes more pronounced at higher speeds. But it’s when the curves come into view that the fun truly begins, as the bike’s handling and agility reveal themselves. With its unique blend of on-road and off-road prowess, the KTM 640 LC4 Enduro is a must-ride experience for any adventure-seeking motorcyclist.

Key Specifications

Engine TypeFour stroke, single Cylinder. SOHC, 4 valves, engine balancer
Engine Capacity624.6 cc / 38.1 cu in
Max Power40.1 kw / 55 hp
Max Torque55Nm / 5.6 kgf-m / 40.6 lb-ft @ 5500 rpm
Fuel Tank Capacity12L/ 3.2 US gal / 2.6 Imp gal
Seat Height36.6 inches / 930 mm
KTM 640 LC4Enduro (2005 - 2007)

All Specifications

Make & Model

ModelKTM 640 LC4Enduro
Year2005 – 2007

Engine

Engine TypeFour stroke, single Cylinder. SOHC, 4 valves, engine balancer
Displacement624.6 cc / 38.1 cu in
Bore x Stroke101 x 78 mm
Compression Ratio11.5:1
Max Horsepower40.1 kw / 55 hp
Max Torque55Nm / 5.6 kgf-m / 40.6 lb-ft @ 5500 rpm
Engine Management SystemMikuni BST 40 carburetor
Lubrication System2 x Eaten oil pumps
Cooling SystemLiquid cooled

Performance

Top Speed168 km/h / 104 mph

Transmission

ClutchMulti-disc in oil bath
Gearbox5 Speed
Primary Drive Ratio30:81, straight cut gears
Gear Ratios1st 14:35 / 2nd 15:24 / 3rd 18:21 / 4th 20:19 / 5th 22:18
Final DriveChain, O-ring 5/8 x 1/4″

Electrical & Electronics System

Battery12V 8Ah, maintenance free
StarterElectric & kick

Chassis & Suspension

Frame TypeCentral chrome-moly steel frame
Front SuspensionWhite Power Up Side Down 4357 MXMA fork
Rear SuspensionCentral shock absorber (WP BAVP3612) with PRO-LEVER linkage to rear- swing-arm with needle bearing
Trail62o

Wheels & Brakes

Front Tire Size90/90 -21
Rear Tire Size140/80 -18
Front BrakesSingle 300 mm disc, 4 piston caliper
Rear BrakesSingle 220 mm disc, 1 piston caliper

Dimension & Weights

Seat Height36.6 inches / 930 mm
Wheelbase59.4 inches / 1510 mm
Ground Clearance310mm / 12.2 in
Fuel Tank Capacity12L/ 3.2 US gal / 2.6 Imp gal

Features

  • Four-stroke, single-cylinder engine
  • SOHC design
  • 4 valves
  • Engine balancer
  • Electric start
  • Counterbalancers on crank and camshaft
  • 43mm USD forks
  • Hydraulic clutch
  • ‘High flow’ head
  • 300mm disc brake on front
  • Brembo caliper on front
  • WP rear shock
  • Single power delivery
  • Big travel forks
  • 21 front hoop
  • Semi-knobblies tires
  • Kick starter
  • Liquid-cooled engine
  • 4-valve design
  • Major makeover in 1999
KTM 640 LC4Enduro (2005 - 2007)

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