Positioned in KTM's enduro - offroad motorcycle lineup, the 2003 KTM 660 LC4 Rally Factory Replica pairs a 654 cc (39.9 cu in) liquid-cooled single cylinder, four-stroke architecture with road-focused gearing. In factory specification, peak output is rated at 65 HP (47.4 kW) at 7,500 rpm while maximum torque reaches 69.5 Nm (51.3 lb-ft) at 6,000 rpm, transferring power to the rear wheel through a 5-speed gearbox and chain final drive. With a specific output of 99.4 HP per liter and a 1,500 rpm working window between peak torque (6,000 rpm) and peak power (7,500 rpm), the engine character is reflecting a performance-oriented street tune that balances strong mid-range pull with an energetic top-end rush.
On the scales, the 660 LC4 Rally Factory Replica measures 162 kg (357 lbs) dry, translating to a power-to-weight ratio of 0.4 HP/kg (2.49 kg per horsepower). Rider ergonomics and chassis geometry center around a 980 mm (38.6 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 48-liter (12.7 US gal) fuel tank supports practical everyday commuting and weekend road stints.
Specific Output
99.4 HP/L
Power-to-Weight
0.4 HP/kg (2.49 kg/HP)
Power Band Window
6,000–7,500 rpm
Standover Height
980 mm (38.6 in)
Engine
Displacement654.0 ccm (39.91 cubic inches)
Engine TypeSingle cylinder, four-stroke
Engine DetailsSingle cylinder, four-stroke
Power65.0 HP (47.4 kW)) @ 7500 RPM
Torque69.5 Nm (7.1 kgf-m or 51.3 ft.lbs) @ 6000 RPM
Compression11.5:1
Bore x Stroke102.0 x 80.0 mm (4.0 x 3.1 inches)
Valves/Cylinder4
Fuel SystemCarburettor
CoolingLiquid
Transmission
Gearbox5-speed
Final DriveChain (final drive)
Chassis
Front SuspensionWP-USD 48 Multi Adjuster
Front Travel295 mm (11.6 inches)
Rear SuspensionWP - Monoshock
Rear Travel320 mm (12.6 inches)
Wheelbase1510 mm (59.4 inches)
Ground Clearance320 mm (12.6 inches)
Wheels & Brakes
Front Tyre90/90-21
Rear Tyre140/90-18
Front BrakesSingle disc
Front Brake Ø300 mm (11.8 inches)
Rear BrakesSingle disc
Rear Brake Ø220 mm (8.7 inches)
Dimensions & Weight
Dry Weight162.0 kg (357.1 pounds)
Power/Weight0.4012 HP/kg
Seat Height980 mm (38.6 inches) If adjustable, lowest setting.
Use this page to compare this motorcycle by its real specifications, not only by model name. Focus on the details that affect fit, comfort, handling, range and ownership.
Power
Compare engine output with similar motorcycles if acceleration, highway use or two-up riding matters.
Torque
Torque is useful for judging real-world pull, especially for touring, commuting and loaded riding.
Seat Height
Check the seat height against your inseam and riding posture before choosing a motorcycle.
Weight
Compare weight carefully because it affects low-speed handling, parking and confidence.
Fuel Capacity
Fuel capacity helps estimate touring range and how often you may need to stop.
Brakes
Brake setup is worth comparing if you ride in traffic, mountains or with a passenger.
Suspension
Suspension details can matter for comfort, road feel and long-distance riding.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
