• Model: 400
  • Manufactured by: KTM
$16.99

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## KTM 400 / 640: An Exploration of a Legendary Enduro Machine

The KTM 400 / 640 range represents a legacy of excellence in the world of off-road riding. These enduring machines have graced the trails and tracks for decades, earning a reputation for their remarkable performance, agility, and durability.

### A Pedigree of Innovation

The KTM 400 and 640 models trace their lineage to the early days of KTM's motorcycle manufacturing prowess. In 1997, the Austrian manufacturer introduced the LC4 engine, a revolutionary single-cylinder design that combined high power output with exceptional fuel efficiency. This innovative powerplant formed the cornerstone of the KTM enduro lineup, including the legendary 400 and 640 models.

### Engine Specifications and Performance

The heart of the KTM 400 / 640 is the LC4 engine, available in both 400cc and 640cc capacities. The 400cc variant produces an impressive 39 horsepower, while the larger 640cc engine delivers a robust 50 horsepower.

Both engines feature a single-overhead-camshaft (SOHC) design, optimizing valve timing and reducing mechanical complexity. The liquid-cooling system ensures efficient temperature management, even in demanding off-road conditions.

### Chassis and Suspension

The KTM 400 / 640 is built upon a lightweight and robust steel frame, providing a stable and responsive handling experience. The suspension system is meticulously engineered to tackle the rigors of off-road riding.

At the front, a 48mm WP upside-down fork provides ample travel and adjustability, allowing riders to fine-tune the suspension to suit their riding style and terrain conditions. At the rear, a WP monoshock with linkage delivers progressive damping, ensuring excellent handling and rider comfort.

### Handling and Agility

The KTM 400 / 640 is renowned for its exceptional handling and agility. Its compact dimensions and low weight make it a joy to maneuver through tight trails and technical terrain. The responsive suspension system and ergonomic design provide a comfortable and intuitive riding experience.

### Off-Road Prowess

The KTM 400 / 640 is a true off-road weapon, capable of conquering a wide range of challenges. Its 21-inch front wheel and 18-inch rear wheel provide ample ground clearance and stability in even the roughest terrain.

The knobby tires offer excellent grip on loose surfaces and allow for confident cornering. The powerful brakes ensure adequate stopping power in all conditions, providing riders with the confidence to push their limits.

### Reliability and Durability

The KTM 400 / 640 is built to withstand the rigors of off-road riding. Its robust construction, high-quality components, and attention to detail ensure exceptional reliability and durability. Regular maintenance is essential to keep these machines performing at their best, but they are renowned for their ability to endure even the most demanding conditions.

### A Legacy of Excellence

For over two decades, the KTM 400 / 640 has been a cornerstone of the enduro motorcycle market. Its combination of performance, agility, and durability has made it a favorite among off-road enthusiasts worldwide. Whether you're tackling technical trails or exploring vast wilderness, the KTM 400 / 640 is the perfect companion for your off-road adventures.


400/640 LC4-E, 640 LC4-E SUPERMOTO, 640 LC4 ADVENTURE, 640 DUKE

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This catalogue has been compiled to assist anyone owning or servicing a Ducati.

Easy to read exploded views to make easy identification, careful disassembly, accurate adjustment, and correct repairs. All sections are neatly organized in Adobe Acrobat, the entire document is scalable to several times normal size. Tons of illustrations with exploded views and part numbers. All depicted in assembly order which is essential when assembling or disassembling motorcycle components.

CONTENTS

WORKSHOP SPECIAL TOOLS
DIAGNOSIS TESTER MATHESIS
WORKSHOP SPECIAL TOOLS
GEARCHANGE
GEAR-BOX
CLUTCH
CLUTCH COVER
CRANKSHAFT
CYLINDERS - PISTONS
TIMING
FILTERS AND OIL PUMP
HALF CRANKCASES
ALTERNATOR COVER
ELECTRIC STARTER AND IGNITION
HEAD : TIMING
VERTICAL HEAD
HORIZONTAL HEAD
INLET DICT
EXHAUST SYSTEM
STANDS
FRAME
L.H. FOOT RESTS
R.H. FOOT RESTS
HEAD-LIGHT AND ELECTRIC WIRING
INSTRUMENT PANEL
HANDLEBAR AND CONTROLS
FRONT FORK
CLUTCH CONTROL
FRONT BRAKE
ELECTRIC SYSTEM
BATTERY BOX MOUNT
AIR INDUCTIO AND OIL VENT
SWINGARM AND CHAIN
REAR HYDRAULIC BRAKE
WHEELS
NUMBER PLATE HOLDER
SEAT
FUEL SYSTEM
FUEL TANK
HEADLIGHT FAIRING
FAIRING
HALF FAIRING

The above is a general description of of the contents covered in a part manual. The contents of this manual may differ in content



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