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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 see table #
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
ŀ Ł
–
+
0°C
32°F
15W 40
15W 50
10W 40
10W 50
API: SG, SH
TEMPERATURE
Engine oil
Use only synthetic oil brands, which meet quality requirements
(Motorex Power Synt 4T) of API-classes SG or SH (informations on
bottles) or higher.
!
CAUTION
!
P
OOR OIL QUALITY OR MINOR QUANTITY EFFECT EARLY ENGINE-WEAR.
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