KTM DUKE 640 e - Technical Specifications - Engine

ENGLISH
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TECHNICAL DATA – ENGINE KTM 640 LC4 e
Type 640 LC4-E
Design Liquid-cooled single cylinder 4-stroke engine with balancer shaft and electric starter
Displacement 625 ccm
Bore / Stroke 101 / 78 mm
Ratio 11,0 : 1
Fuel unleaded premium gasoline with a least RON 95
Valve timing 4 valves over rocker arm and 1 overhead camshaft, camshaft drive through single chain
Camshaft 249° (249)
Valve timing by 1 mm IO 13° BTDC EO 53° BBDC
valve clearence IC 51° ABDC EC 11° ATDC
Valve diameter Intake: 36 mm Exhaust: 30 mm
Valve clearence cold Intake: 0.15 mm Exhaust: 0.15 mm
Crank shaft bearing 2 cylinder roller bearing
Connecting rod bearing needle bearing
Top end bearing bronze bushing
Piston cast aluminium alloy
Piston rings 1 compression ring, 1 taper face ring, 1 oil scraper ring
Engine lubrication 2 Eaton-Oilpumps
Quantity of engine oil see page 38
Engine oil 2.1 liters including frame
Primary ratio straight geared spur wheels 30 : 81 teeth
Clutch multi disc clutch in oil bath
Transmission 5-speed claw shifted
Ignition system contactless DC- CDI ignition with digital advanced system type KOKUSAN
Ignition timing adjustment to max. 38° BTDC at 6000 rpm
Generator 12V 200W
Spark plug NGK DR8EA
Spark plug gap 0.7 mm
Cooling system liquid cooled, permanent rotation of cooling liquid through mechanic driven water pump
Cooling liquid 1liter, 40% antifreeze, 60% water, at least –25° C (–13° F)
Starting equipment electric starter, kick starter
ASSEMBLY CLEARANCE, WEAR LIMIT
Crank shaft axial play . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.03 - 0.12 mm
run out of crank stud . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .max. 0.08 mm
Connecting rod bearing radial play . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .max. 0.05 mm
axial play . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .max. 1.10 mm
Cylinder bore . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .max. 101.04 mm
Piston assembly clearance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .max. 0.12 mm
Piston rings end gap compression rings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .max. 0.80 mm
oil scraper ring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .max. 1.00 mm
Valves seat sealing intake . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .max. 1.50 mm
seat sealing exhaust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .max. 2.00 mm
run out of valve heads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .max. 0.05 mm
valve guides diameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .max. 7.05 mm
Oil pumps clearance outer rotor - housing . . . . . . . . . . . . . . . . . . . . . . . . . . . .max. 0.20 mm
clearance outer rotor - inner rotor . . . . . . . . . . . . . . . . . . . . . . . . . .max. 0.20 mm
Bypaß valve minimum spring length . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25.00 mm
Clutch Length of springs . . . . . . . . . . . . . . . . . . . . . . . .min. 35.00 mm (new 37.00 mm)
wear limit organic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .min. 2.50 mm
Camshaft diameter of bearing bolt (needle bearing) . . . . . . . . . . . . . . . . . . .min. 19.97 mm
Transmission shafts axial play . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .0.10 - 0.40 mm