Repair manual KTM LC4
Art.-Nr
. 3.206.014 -E
11-61E
Engine
640 LC4
Design
Liquid-cooled single cylinder 4-stroke engine with balancer shaft and electric starter
Displacement
625 ccm
Bore / Stroke
101 / 78 mm
Ratio
11.7 : 1
Fuel
unleaded premium gasoline with at least RON 95 (USA = Premium RON 91) (RON 80-94 for other ignition curve
Valve timing
4 valves over rocker arm and 1 overhead camshaft, camshaft drive through single chain
Camshaft
249/1
Valve diameter
Intake: 36 mm Exhaust: 32 mm
Valve clearence cold
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 quantity
appr. 2,1 liters including frame
Primary ratio
straight geared spur wheels 31 : 79 teeth
Clutch
multi disc clutch in oil bath, hydraulically operated
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 4K5
Ignition timing
adjustment to max. 38° BTDC at 6000 rpm
Generator
12V 200W
Spark plug
NGK DCPR 8 E
Spark plug gap
0,9 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
TECHNICAL DATA – ENGINE 640 LC4, 640 LC4 Supermoto 2004
BASIC CARBURETOR SETTING
Type
BST40-266
Main jet
152,5
Needle jet
X-6 689
Idling jet
45
Jet needle
6G5
Needle clip pos. f. top
3. from top
Mixt. adj. screw open
2,25
640 LC4
640 LC4 Supermoto
BASIC CARBURETOR SETTING
Carburetor
BST40-258
Main jet
145
Needle jet
689 X-6
Idling jet
45
Jet needle
6G5
Needle position from top
3 rd
Mixture.adju. screw open
2.25 turn
640 DUKE
40 kW
BASIC CARBURETOR SETTING
Type
BST40-266
Main jet
152,5
Needle jet
X-6 689
Idling jet
45
Jet needle
6G5
Needle clip pos. f. top
3. from top
Mixt. adj. screw open
2,25
640 LC4 Adventure
Содержание 400-660 LC4 1998-2005
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