KTM 250 EXC 2004 - Manual (Page 49)

ENGLISH
48
Engine
125 SX
125 EXC
200 SX
200 EXC
Design
Liquid-cooled, single-cylinder, two-stroke engine with intake and exhaust control
Piston displacement
124.8 ccm
193 ccm
Bore / stroke
54 / 54.5 mm (2.126 / 2.145 in)
64 / 60 mm (2.52 / 2.362 in)
Fuel
unleaded fuel with at least RON 95 (USA = Premium RON 91), mixed with high grade two stroke oil
Oil /
gasoline ratio
1:40-1:60 when using high grade, two- stroke oil (Motorex Cross Power 2T). When in doupt, please contact you
r importer
Crankshaft bearing
1 deep-groove ball bearing / 1 cylinder roller bearing
Connecting rod bearing
needle bearing
Piston pin bearing
needle bearing
Piston
cast piston
Piston ring
one plain compression ring
two plain compression rings
one plain compression ring
two plain compression rings
Dimension
“X“
0,0 mm
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
Electrode gap
0,60 mm
Dimension
“Z“
43 mm (1.67 in)
46 mm (1,81 in)
47 mm (1.85 in)
Primary drive
straight cut spur gears, primary ratio 23:73
Clutch
multiple disc clutch in oil bath, hydraulically operated (Motorex Kupplungs-Fluid 75)
Transmission
5
speed, claw actuated
6 speed, claw actuated
Gear ratio 1st gear
13 : 32 „1S32“
12 : 33 „1G33“
13 : 32 „1S32“
13 : 33 „1G33“
2nd gear
„2S15“ 15 : 30 „2S30“
„2S15“ 15 : 31 „2G31“
„2S15“ 15 : 30 „2S30“
„2S15“ 15 : 31 „2G31“
3rd gear
„3S17“ 17 : 28 „3S28“
„3S17“ 17 : 28 „3S28“
„3S17“ 17 : 28 „3S28“
„3S17“ 17 : 28 „3S28“
4th gear
„4S19“ 19 : 26 „4S26“
„4S19“ 19 : 26 „4S26“
„4S19“ 19 : 26 „4S26“
„4S19“ 19 : 26 „4S26“
5th gear
„5S21“ 21 : 25 „5S25“
„5S21“ 21 : 25 „5S25“
„5S21“ 21 : 25 „5S25“
„5G17“ 21 : 25 „5G19“
6th gear
„6G20“ 20 : 20 „6G20“
„6S22“ 20 : 23 „6S23“
„6G22“ 20 : 20 „6G20“
Gear lubrication
0.7 l engine oil (Motorex Top Speed 4T 15W50)
Available chain sprockets
13Z / 14Z / 15Z for chain
5
/ 8
x
1
/ 4
"
Coolant
1.2 litres, 40% anti freeze, 60% water, at least -25 °C (-13 °F)
Ignition system
KOKUSAN 2K-1
KOKUSAN 2K-3
KOKUSAN 2K-3
KOKUSAN 2K-3
Gener
ator output
no genaerator
12V / 110 W
12V / 110 W
12V 110 W
Ignition system USA
KOKUSAN 2K-1
KOKUSAN 2K-2
KOKUSAN 2K-3
KOKUSAN 2K-2
Gener
ator output
no genaerator
12V 40 W
12V / 110 W
12V 40 W
Carburetor
flat-slide carburetor, carburetor setting see table
Air-filter
wet foam type air filter insert
(upper edge piston- upper edge cylinder)
(height of the control flap)
TECHNICAL DA
TA
– ENGINE 125 / 200 SX, EXC 2004