Repair manual KTM 125 / 200
Art No 3.206.005 -E
9-8C
Engine
125 SX
125 EXC
200 MXC
200 EXC
Design
Liquid-cooled single-cylinder two-str
oke engine with intake and exhaust contr
ol
Piston displacement
124.8 ccm
193 ccm
Bor
e / str
oke
54.25 / 54 mm (2.136 / 2.126 in)
64 / 60 mm (2.52 / 2.362 in)
Fuel
unleaded SUPER fuel, r
esear
ch octane no 95, mixed with high grade two str
oke oil
Oil /
gasolin ratio
1:40-1:60 when using high grade two str
oke oil (Shell Advance Racing X). When in doupt, please contact your i
mporter
Crankshaft bearing
1 deep-gr
oove ball bearing / 1 cylinder r
oller bearing
Connecting r
od bearing
needle bearing
Piston pin bearing
needle bearing
Piston
for
ged piston
cast piston
Piston ring
one plain compr
ession ring
two plain compr
ession rings
Dimension "X"
0.60 mm (0.024 in)
0.55 mm (0.22 in)
Ignition timing
1.4 mm (0.055 in) (16.5°) BTDC
1.6 mm (0.063 in) (17°) BTDC
Spark plug
NGK BR9 EVX
NGK
BR
8 EG
Electr
ode gap
0.60 mm (0,024 in)
Dimension "Z"
42 mm (1.65 in)
46 mm (1.81 in)
Primary drive
straight cut spur gears, primary ratio 23:73
Clutch
multiple disc clutch in oil bath, hydraulic operated (Shell HF-E15)
Transmission
6 speed, claw actuated
Gear ratio
1st gear
13 : 32
12 : 33
13 : 32
12 : 33
2nd gear
15 : 30
15 : 31
15 : 30
15 : 31
3r
d gear
17 : 28
17 : 28
17 : 28
17 : 28
4th gear
19 : 26
19 : 26
19 : 26
19 : 26
5th gear
21 : 25
21 : 25
21 : 25
17 : 19
6th gear
22 : 24
20 : 20
22 : 23
22 : 20
Gear lubrication
0.7 l engine oil 20W
-40 (Shell Advance VSX4)
A
vailable chain spr
ockets
13t / 14t / 15t for chain
5
/
8
x
1
/
4
"
Coolant
1.2 litr
es, 40% anti fr
eeze, 60% water
, at least -25 °C (-13 °F)
Ignition system
KOKUSAN 2K-1
KOKUSAN 2K-3
–
KOKUSAN 2K-3
Generator output
no generator
12V / 110 W
–
12V 110 W
Ignition system USA
KOKUSAN 2K-1
KOKUSAN 2K-2
Generator output
no generator
12V 40 W
Carbur
etor
flat-slide carbur
etor
, carbur
etor setting see table
Air
-filter
wet foam type air filter insert
(upper edge piston-
upper edge cylinder
height of the
contr
ol flap
TECHNICAL DA
TA
- ENGINE 125 / 200 2000
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