11-56E
BASIC CARBURATOR SETTING
Type Keihin FCR-MX 41
Carburator-setting number 4138A
Main jet 165
Jet needle OBDVT
Idling jet 42
Main air jet 200
Idling air jet 100
Needle position 5. rd from top
Starting jet 85
Mixture control screw open 2
Slide 15
Performance restrictor Slide stop
Stop pump membrane 858 / 2,15 mm
Hot start device 3,8 mm
660 SMC
Engine 660 SMC
Design Liquid-cooled single cylinder 4-stroke engine with balancer shaft
Displacement 653 ccm
Bore / Stroke 102 / 80 mm
Ratio 11,5 : 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 586-V039
Valve diameter Intake: 36 mm Exhaust: 32 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 forged aluminium alloy
Piston rings 1 compression ring, 1 taper face ring, 1 oil scraper ring
Engine lubrication two Eaton-oilpumps
Engine oil SAE 5W/40, 10W-50 (f.ex. Motorex Power Synt 4T)
Engine oil quantity 1,6 liters (0,42 US gallons)
Primary ratio straight geared spur wheels 31 : 79 teeth
Clutch multi disc clutch in oil bath
Transmission 5-speed claw shifted
Gear ratio 1st 14:35
2nd 15:24
3rd 18:21
4th 20:19
5th 22:18
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 DCPR8 E
Spark plug gap 0,9 mm
Cooling system liquid cooled, permanent rotation of cooling liquid through mechanic driven water pump
Cooling liquid at least –25°C (–13°F)
Starting equipment kickstarter
TECHNICAL SPECIFICATIONS – ENGINE 660 SMC 2003
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