KTM 620 LC4 Supermono (1998)

The KTM 620 LC4 Supermono was a motorcycle model released in 1998. It had a four-stroke, single-cylinder, SOHC engine with a capacity of 609 cc and a compression ratio of 10.4:1. The bike was liquid-cooled with a Dell’Orto PHM 40 SD induction system and a KDC-CDI ignition. The KTM 620 LC4 Supermono had a maximum power output of 40.1 kW/55 hp at 7000 rpm and a maximum torque of 60 Nm/6.1 kgf-m/44.3 lb-ft at 5500 rpm. The wet, multiplate clutch model had a 5-speed transmission and a chain final drive. The front suspension featured WP telescopic forks that were compression and rebound adjustable while the rear suspension included a single shock absorber that could be adjusted for preload, compression, and rebound. The front brake was a single 320mm disc with a 4-piston caliper, while the rear brake was a single 220mm disc with a 1-piston caliper. The front and rear tyres were 120/70 – 17 and 160/60 – 17, respectively. The wheelbase was 1510mm/59.4in, and the fuel capacity was 12L/3.2 US gal/2.6 Imp gal.

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Technical specifications:

Make Model: KTM 620 LC4 Supermono

Year: 1998

Engine: Four stroke, single cylinder, SOHC, 4 valves

Capacity: 609 cc / 37.2 cu in

Bore x Stroke: 101 x 76 mm

Compression Ratio: 10.4:1

Cooling System: Liquid cooled

Induction: Dell’Orto PHM 40 SD

Ignition: KDC-CDI

Starting: Kick & electric

Max Power: 40.1 kW / 55 hp @ 7000 rpm

Max Torque: 60 Nm / 6.1 kgf-m / 44.3 lb-ft @ 5500 rpm

Clutch: Wet, multiplate

Transmission: 5 Speed

Final Drive: Chain

Front Suspension: WP Telescopic forks, compression and rebound adjustable

Front Wheel Travel: 285 mm / 9.1 in

Rear Suspension: Single chock, preload, compression and rebound adjustable

Rear Wheel Travel: 320 mm / 12.6 in

Front Brakes: Single 320 mm disc, 4 piston caliper

Rear Brakes: Single 220 mm disc, 1 piston caliper

Front Tyre: 120/70 – 17

Rear Tyre: 160/60 – 17

Wheelbase: 1510 mm / 59.4 in

Fuel Capacity: 12 L / 3.2 US gal / 2.6 Imp gal