KTM 640 Duke II (2001-02)

The KTM 640 Duke II is a motorcycle produced in 2001-02 with a liquid-cooled, four-stroke, single-cylinder engine that has a capacity of 624.6cc and a compression ratio of 11.5:1. It features a Mikuni BST 40 carburetor and Kokusan contactless DC-CDI ignition. The bike has both electric and kick starting options, and a 12V 8Ah maintenance-free battery. The engine can produce 55hp at 7000rpm with a maximum torque of 60Nm at 5500rpm. It has a multi-disc clutch and a 5-speed transmission with a final drive ratio of 17:38. The frame is a central chrome-moly steel frame with adjustable front suspension (WP – 4054 Roma Top adjuster, preload, compression and rebound adjustable) and rear suspension (central shock absorber WP IBS with PRO-LEVER linkage to rear swing-arm with needle bearing). The bike has a single 320mm disc, 4-piston caliper front brake and a single 220mm disc, 1-piston caliper rear brake. The front and rear tires are respectively 120/70 ZR17 58H and 160/60 ZR17 69H with a wheelbase of 1460mm and a ground clearance of 250mm. The bike has a seat height of 860mm and dry weight of 145kg with a fuel capacity of 11.3L. It can reach a top speed of 101mph and complete a standing quarter-mile in 12.5 seconds.

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Technical specifications:

Make Model: KTM 640 Duke II

Year: 2001 – 02

Engine: Four stroke, single Cylinder. SOHC, 4 valves, engine balancer

Capacity: 624.6 cc / 38.1 cu in

Bore x Stroke: 101 x 78 mm

Compression Ratio: 11.5:1

Cooling System: Liquid cooled

Lubrication: 2 x Eaten oil pumps

Induction: Mikuni BST 40 carburetor

Ignition: Kokusan contactless DC-CDI ignition with advanced system

Starting: Electric & kick

Spark Plug: NGK DRBEA

Battery: 12V 8Ah, maintenance free

Max Power: 40.1 kW / 55 hp @ 7000 rpm

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

Clutch: Multi-disc in oil bath

Transmission: 5 Speed

Primary Drive Ratio: 30:81, straight cut gears

Gear Ratios: 1st 14:35 / 2nd 15:24 / 3rd 18:21 / 4th 20:19 / 5th 22:18

Final Drive Ratio: 17:38

Final Drive: Chain, O-ring 5/8 x 1/4″

Frame: Central chrome-moly steel frame

Front Suspension: WP – 4054 Roma Top adjuster, preload, compression and rebound adjustable

Front Wheel Travel: 140 mm / 5.5 in

Rear Suspension: Central shock absorber WP IBS with PRO-LEVER linkage to rear- swing-arm with needle bearing

Rear Wheel Travel: 170 mm / 6.7 in

Front Brakes: Single 320 mm disc, 4 piston caliper

Rear Brakes: Single 220 mm disc, 1 piston caliper

Front Tyre: 120/70 – ZR17 58H

Rear Tyre: 160/60 – ZR17 69H

Steering Head Angle: 62.5o

Wheelbase: 1460 mm / 57.5 in

Ground Clearance: 250 mm / 9.9 in

Seat Height: 860 mm / 33.9 in

Dry Weight: 145 kg / 320lbs

GVWR: 350 kg / 773 lbs

Engine Oil Capacity: 2.2 L / 2.3 US qt / 1.9 Imp qt

Fuel Capacity: 11.3 L / 3.0 US gal / 2.4 Imp gal

Standing 1/4 Mile: 12.5 sec

Top Speed: 162 km/h / 101 mph