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TECHNICAL DATA – ENGINE 400 / 640 LC4 ‘99
Engine 400 LC4 640 LC4
Design Liquid-cooled single cylinder 4-stroke engine with balancer shaft and electric starter
Displacement 398 ccm 625 ccm
Bore / Stroke 89 / 64 mm 101 / 78 mm
Ratio 10,8 : 1 11 : 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 249/1
Valve timing by 1 mm IO 22° BTDC EO 60° BBDC IO 13° BTDC EO 53° BBDC
valve clearence IC 47° ABDC EC 4° ATDC IC 51° ABDC EC 11° ATDC
Valve diameter Intake: 36 mm Exhaust: 30 mm
Valve clearence cold Intake: 0,20 mm Exhaust: 0,20 mm 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/cast aluminium alloy
Piston rings 1 compression ring, 1 taper face ring, 1 oil scraper ring
Engine lubrication two Eaton-oilpumps
Engine oil see bellow #
Engine oil quantity appr. 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
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 DR8EA
Spark plug gap 0,7 mm
Cooling system liquid cooled, permanent rotation of cooling liquid through mechanic driven water pump
Cooling liquid 1 liter, 40% antifreeze, 60% water, at least –25 ° C (–13 ° F)
Starting equipment electric starter and kickstarter
Engine oil
Use only oil brands (Shell Advance Ultra 4), which meet qua-
lity requirements of API-classes SF, SG or SH (informations
on bottles) or higher. Both, mineral and synthetic oils with
above specifications can be used.
!
CAUTION
!
POOR OIL QUALITY OR MINOR QUANTITY EFFECT EARLY ENGINE-WEAR.
#
–
+
0°C
32°F
15W 40
15W 50
15W 60
10W 40
10W 50
10W 60
API: SF, SG, SH
TEMPERATURE
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