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KTM LC 4 640 Supermoto
1999
1999
The 1999 KTM LC4 640 Supermoto was a serious contender in the burgeoning supermoto scene of the late 90s. Built upon KTM's robust LC4 engine platform, it offered a raw and unfiltered riding experience for those seeking agility and performance on the road. A direct competitor at the time was the Husqvarna SM 610, also offering a similar single-cylinder supermoto experience.
At the heart of the 1999 KTM LC4 640 Supermoto lies a 625.0 ccm (38.14 cubic inches) single-cylinder, four-stroke engine. This powerplant provides ample torque for spirited acceleration. The bike's relatively light weight of 137.0 kg (302.0 pounds) further enhances its nimble handling. With a fuel capacity of 12.00 litres (3.17 US gallons), riders can expect a reasonable range for shorter trips and canyon carving. The top speed is rated at 160.0 km/h (99.4 mph), which is more than adequate for the supermoto riding style, often prioritizing corner speed over outright top-end power.
The riding experience on the LC4 640 Supermoto is characterized by its upright stance and responsive handling. The suspension is firm, providing good feedback from the road and allowing for precise control through corners. It's a machine that requires an active riding style, rewarding rider input with sharp turns and responsive acceleration. Comfort is not a primary focus, as the seat is relatively firm and the suspension can be stiff on rougher surfaces, but this contributes to its focused nature.
The 1999 KTM LC4 640 Supermoto appeals to riders who prioritize agility, performance, and a raw, connected riding experience. It's ideal for experienced motorcyclists who enjoy carving through twisty roads and appreciate the simplicity of a single-cylinder machine. While it may not be the most comfortable option for long-distance touring, its sharp handling and potent engine make it a fun and engaging supermoto option.
✅ Why buy this bike?
• Lightweight chassis and powerful 625cc engine offer exceptional agility and acceleration, making it a true supermoto performer. • WP suspension components (front and rear) provide excellent handling and control on both the street and track. • Simple, carbureted engine design allows for relatively easy maintenance and tuning, appealing to mechanically inclined riders. • Upright riding position and wide handlebars offer great visibility and control, ideal for navigating urban environments. • Brembo brakes provide strong and reliable stopping power, crucial for aggressive riding and track use. • Relatively affordable compared to newer supermoto models, making it an accessible entry point to the class.⚠️ Things to consider
• Vibrations from the single-cylinder engine can be significant, leading to rider fatigue on longer rides. • The LC4 engine requires frequent maintenance, including valve checks and oil changes, compared to modern engines. • The seat is notoriously uncomfortable for extended periods, limiting long-distance riding capabilities. • Finding replacement parts can be challenging due to the age of the motorcycle. • Carburetor can be finicky and require adjustments depending on altitude and temperature, impacting fuel efficiency.Rule of thumb: under 125cc / 15HP → A1, under 47HP → A2, above → A.
Estimated average for 625cc class: 35-50 mpg (5.0-7.0 L/100km)
⛽ Tank: 12.00 litres (3.17 US gallons)
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