KTM 400-660 LC4 1998-2005 User Manual

11-67F
Repair manual KTM LC4 Art.-Nr. 3.206.024 -E
ENGINE 625 SXC / SMC
Design Liquid-cooled single cylinder 4-stroke engine with balancer shaft
Displacement 625 cm
3
Bore / Stroke 101 / 78 mm
Ratio 11,7 : 1
Fuel unleaded fuel with at least RON 95 (USA = Premium RON 91)
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 Intake: 0,12 - 0,15 mm Exhaust: 0,12 - 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
Transmission 5-speed claw shifted
Gear ratio
1
st
14:35
2
nd
15:24
3
rd
18:21
4
th
20:19
5
th
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 DCPR 8E
Spark plug gap 0,9 mm
Cooling system liquid cooled, permanent rotation of cooling liquid through mechanic driven water pump
Cooling liquid 1 liter, 50% antifreeze, 50% destilled water, at least –25°C (–13°F)
Starting equipment kick - electric starter
BASIC CARBURETOR SETTING
625 SXC/SMC
Type Keihin FCR-MX 4138A
Carburator-setting number 4138A
Main jet 165
Jet needle OBDVT (OBEKR)
Idling jet 42 (45)
Main air jet 200
Idling air jet 100
Needle position 5
th
from top (4
th
from top)
Starting jet 85
Mixture control screw open 2
Slide 15
Performance restrictor slide stop
Stop pump membrane 858 / 2,15 mm
Hot start device 3,8 mm
TECHNICAL SPECIFICATIONS – ENGINE 625 SXC / SMC 2005

KTM 400-660 LC4 1998-2005 Specifications

General

Brand	KTM
Model	400-660 LC4 1998-2005
Category	Engine
Language	English