KTM 1998 400 R, Owner'S Handbook Manual

Page: 36 / 42

ENGLISH
34
TECHNICAL DA
TA
– ENGINE 400 / 620 R/XC e ‘98
Crank shaft
axial play
...................0,03 - 0,12 mm (0,0012 - 0,0047 in)
run out of crank stud
.................max. 0,04 mm (0,0016 in)
Connecting rod bearing
radial play
...................................max. 0,05 mm (0,002 in)
axial play
.....................................max. 1,10 mm (0,043 in)
Cylinder 400
bore diameter
..........................max. 89,04 mm (3,5055 in)
Cylinder 620
bore diameter
........................max. 101,04 mm (3,9779 in)
Piston
assembly clearance
....................max. 0,12 mm (0,0047 in)
Piston rings end gap
compression rings
......................max. 0,80 mm (0,0315 in)
oil scraper ring
.............................max. 1,0 mm (0,0394 in)
Valves
seat sealing intake
.....................max. 1,50 mm (0,0591 in)
seat sealing exhaust
..................max. 2,00 mm (0,0788 in)
run out of valve heads
...............max. 0,03 mm (0,0012 in)
valve guides diameter
................max. 7,05 mm (0,2778 in)
Oil pump
clearance outer rotor - housing
.max. 0,20 mm (0,0079 in)
clearance outer rotor - inner rotor
..max. 0,20 mm (0,0079
in) Bypaß valve
minimum spring lenght
...........................25 mm (0,985 in)
Clutch
clutchspring lenght
min. 34,5 mm (1,36 in), new 37 mm (1,458 in)
Clutch disks organic
.....................min. 2,5 mm (0,0985 in)
Cam shaft
pin bearing diameter
................min. 19,97 mm (0,7868 in)
TOLERANCE, ASSEMBLY CLEARANCE
Engine
400 LC4-E
620 LC4-E
Design
Liquid-cooled single cylinder 4-stroke engine with balancer shaft and electric starter
Displacement
398 cm
3
609 cm
3
Bore /
Stroke
89 / 64 mm
101 / 76 mm
Ratio
10,8 : 1
10,4 : 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 22°
BTDC EO 60°
BBDC
IO
13°
BTDC EO 53°
BBDC
valve clearence
IC 42°
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