KTM 640 Duke II (2005-07)

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The KTM 640 Duke II is a motorcycle produced from 2005 to 2007 with a four-stroke, single-cylinder engine that has a capacity of 624.6cc. Its compression ratio is 11.5:1 and it has a liquid cooling system, as well as two Eaton oil pumps for lubrication. The ignition system is a Kokusan contactless DC-CDI ignition with an advanced system, and it can start using both electric and kick. The maximum power it can generate is 40.1 kW / 55 hp @ 7000 rpm, with a maximum torque of 60 Nm / 6.1 kgf-m / 44.3 lb-ft @ 5500 rpm. The clutch is multi-disc in oil bath, and it has a 5-speed transmission. The final drive is a chain, O-ring 5/8 x 1/4″. The motorcycle has a central chrome-moly steel frame and uses WP suspension system (4054 Roma Top adjuster) for the front with 140mm/5.5in wheel travel, and a central shock absorber WP IBS with PRO-LEVER linkage to rear-swing-arm and needle bearing for the rear with 170mm/6.7in wheel travel. It has single disc brakes for both front and rear wheels of size 320mm/4 piston and 220 mm/1 piston respectively. The standing 1/4 Mile possible with the motorcycle is 12.5 seconds and the top speed ratable is 162km/h/101mph. The fuel capacity is 11.3 liters/ 3.0 US gal/ 2.4 Imp gal, and it has a dry weight is 145kg/320lbs with a Ground Clearance of 250mm/9.9in and Seat Height of 860mm/33.9in.

Technical specifications:

Make Model: KTM 640 Duke II

Year: 2005 – 07


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 Litres / 2.3 US qt / 1.9 Imp qt

Fuel Capacity: 11.3 Litres / 3.0 US gal / 2.4 Imp gal
Standing 1/4 Mile: 12.5 sec
Top Speed: 162 km/h / 101 mph

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