11-22E
TECHNICAL DATA – ENGINE 640 LC4-E ADVENTURE R ‘99
Engine
640 LC4-E
Design
Liquid-cooled single cylinder 4-stroke engine with balancer shaft and electric starter
Displacement
625 ccm
Bore / Stroke
101 / 78 mm
Ratio
11,0 : 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° (249/1)
Valve timing by 1 mm
IO 13° BTDC EO 53° BBDC
valve clearance
IC 51° ABDC EC 11° ATDC
Valve diameter
Intake: 36 mm Exhaust: 30 mm
Valve clearance cold
0,15 mm Exhaust: 0,15 mm
Crank shaft bearing
2 cylinder roller bearing
Conrod bearing
needle bearing
Top end bearing
bronze bushing
Piston
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
BASIC CARBURETOR SETTING
Carburetor
BST40-225
BST40-225
Carburetor setting number
080298
090298
Main jet
142,5
142,5
Needle jet
689 X-6
689 X-6
Idling jet
45
45
Jet needle
6G5
6G5
Needle position from top
3
rd
3
rd
Mixt. adj. screw open
–
–
Throttle valve
–
–
Starting jet
–
–
Permormance restrictor
slide stop 17 mm
–
640 ADVENTURE
36 kW
640 ADVENTURE
25 kW
Содержание 400-660 LC4 1998-2005
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