KTM 660 RALLY 2007, Supplement Manual, Page: 25 / 40

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TECHNICAL DATA – ENGINE
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TYPE 660 LC4
Design Liquid-cooled single cylinder 4-stroke engine with balancer shaft and electric starter
Displacement 653,7 cm 3
Bore / Stroke 102/80 mm
Ratio 11,6:1
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
Valve diameter Intake: 36 mm Exhaust: 32 mm
Valve clearence cold Intake: 0.10 mm Exhaust: 0.10 mm
Crank shaft bearing 2 cylinder roller bearing
Connecting rod bearing needle bearing
Top end bearing bronze bushing
Piston forged aluminium alloy
Piston rings 1 compression ring, 1 taper face ring, 1 oil scraper ring
Engine lubrication 2 Eaton-Oilpumps
Quantity of engine oil SAE 10W/50 (Motorex Power Synt 4T)
Engine oil 2,2 liters including frame
Primary ratio straight geared spur wheels 31 : 79 teeth
Clutch multi disc clutch in oil bath
Transmission 5-speed claw shifted
Gear ratios 1. Gear 33:15
2. Gear 24:15
3. Gear 21:18
4. Gear 19:20
5. Gear 18:22
Ignition system contactless DC- CDI ignition with digital advanced system type KOKUSAN
Ignition timing adjustment to max. 33° BTDC at 8500 rpm
Generator 12V 200W
Spark plug NGK DR 9 EA
Spark plug gap 0,9 mm
Cooling system liquid cooled, permanent rotation of cooling liquid through mechanic driven water pump
Cooling liquid 1,8 liter, 50% antifreeze, 50% water, at least –25° C (–13° F)
Starting equipment electric starter
BASIC CARBURETOR SETTING
660 Rally ( throttled) 660 Rally (open)
Type Keihin FCR - MX 41 Keihin FCR - MX 41
Carburetor setting mark 4100A 4100A
Main jet 168 (175) 175
Jet needle OBDVT (OBEKR) OBEKR
Idling jet 42 (45) 45
Main air jet 200 200
Idling air jet 100 100
Needle clip position from top V IV
Starting jet 85 85
Mixture control screw open 2 2
Throttle valve 15 15
Performance restrictor slide stop –
Stop pump membrane 858 / 2,15 mm 858 / 2,15 mm