11-20E
TECHNICAL DATA – ENGINE 400 / 640 LC4 ‘99
Engine 400 LC4-E 640 LC4-E
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 at 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 clearance IC 47° ABDC EC 4° ATDC IC 51° ABDC EC 11° ATDC
Valve diameter Intake: 36 mm Exhaust: 30 mm
Valve clearance cold Intake: 0,20 mm Exhaust: 0,20 mm Intake: 0,15 mm Exhaust: 0,15 mm
Crank shaft bearing 2 cylinder roller bearing
Conrod 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 Eaten-oilpumps
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 DPR8 EA-9
Spark plug gap 0,90 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
640 LC4
25 kW
400 LC4
31 kW
400 LC4
25 kW
BASIC CARBURETOR SETTING
Carburetor
Carburetor setting number
Main jet
Needle jet
Idling jet
Jet needle
Needle position from top
Mixture adj. screw open
Throttle valve
Starting jet
Performance restrictor
PHM 38 ND
100197
130
AR 264
50
K 23
2 nd
1,5 turn
50/1
45 (50, 55)
slide stop 51 mm
PHM 38 ND
100197
130
AR 264
50
K 23
2 nd
1,5 turn
50/1
45 (50, 55)
–
BST40-225
080298
142,5
689 X-6
45
6G5
3 rd
–
–
–
slide stop 17 mm
BST40-225
090298
142,5
689 X-6
45
6G5
3 rd
–
–
–
–
640 LC4
37 kW
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