10-4
Art.- No. 3.206.088-E
Repair manual KTM 250 / 300
TECHNICAL SPECIFICATIONS – ENGINE 2005
ENGINE
250 SX/SXS
250 EXC/EXC SIX DAYS
300 MXC/EXC/EXC SIX DAYS
Design
Liquid-cooled single-cylinder two-stroke engine
with KTM Twin Valve Control exhaust system and KTM Torque Chamber
Piston displacement
249 ccm
249 ccm
293.15 ccm
Bore / stroke
66.4 / 72 mm
66.4 / 72 mm
72 / 72 mm
Fuel
unleaded fuel with at least RON 95 (SXS- RON 98), 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 doubt, please contact your 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
two plain compression rings
Dimension “X“
0 + 0.1 mm
Ignition timing
1.9 mm BTDC
Spark plug
NGK BR8 ECM
NGK BR7 ES
NGK BR 7 ES
Electrode gap
0.60 mm
Dimension “Z“
48.5 - 0.2 mm
TVC start open
5200rpm
TVC fully open
7000rpm (red spring), 7500rpm (yellow spring), 7900rpm (green spring)
Primary drive
straight cut spur gears, primary ratio 26:72
Clutch
multiple disc clutch in oil bath, hydraulically operated (Motorex Kupplungs- Fluid 75)
Transmission
5 speed, claw actuated
Gear ratio
250 SX
250 SXS
250/300 EXC/EXC SIX DAYS
300 MXC
1st gear
14 : 28
14 : 28
14 : 30
14 : 28
2nd gear
16 : 26
15 : 24
17 : 26
16 : 26
3rd gear
18 : 24
18 : 24
19 : 23
18 : 24
4th gear
21 : 24
21 : 24
20 : 20
21 : 24
5th gear
22 : 21
22 : 21
29 : 23
22 : 21
Gear lubrication
0.7 liters Motorex Top Speed 4T 15W50
Available chain sprockets
13t / 14t for chain 5/8 x 1/4"
Coolant
1.2 litres, 50% anti freeze, 50% pure 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-2
KOKUSAN 2K-2
Generator output
-
12V / 40 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)
BASIC CARBURETOR SETTING
250 SX/SXS
250 EXC USA, 300 MXC/EXC USA
250 EXC SIX DAYS, 300 EXC SIX DAYS
250 EXC EU/AUS 6.6 KW
300 EXC EU/AUS 9.2 KW
Carburetor
Keihin PWK 38 S AG
Keihin PWK 36 S AG
Keihin PWK 36 S AG
Carburetor setting mark
TBC YMD
G01A0
3600A
Carburetor setting number
–
191102
171102
Main jet
168 (165,170)
160 (162)
160 (162)
Idling jet
42 (40)
35
35
Starting jet
85
85
85
Jet needle
NOZF (NOZG/NOZE)
N3EH (N3EW)
N3CJ (N3EW/N3EH)
Needle position from top
IV
III
I
Throttle valve
6.5
7
7
Air adjustment screw open
1
1
3.5
Performance restrictor
–
–
slide stop 38
Power Jet nozzle
–
–
–
Summary of Contents for 125 SX 2010
Page 2: ...OWNERSMANUAL2010 250 SX 250 300 XC XC W EXC EXC SixDays ...
Page 3: ...OWNER S MANUAL 2010 125 SX 150 SX 250 SX Art no 3211480en ...
Page 91: ...TECHNICAL DATA SHOCK ABSORBER 89 Shock absorber oil p 95 SAE 2 5 ...
Page 93: ...91 ...
Page 222: ...119 ...
Page 223: ...WIRING DIAGRAM 120 ...
Page 226: ...WIRING DIAGRAM 123 ...
Page 304: ...1 2 3 4 7 12 Art No 3 206 088 E Repair manual KTM 250 300 ...
Page 306: ...bl bk 6 7 8 9 7 14 Art No 3 206 088 E Repair manual KTM 250 300 ...
Page 308: ...1 2 3 4 5 7 16 Art No 3 206 088 E Repair manual KTM 250 300 ...
Page 393: ...11 15 PERIODIC MAINTENANCE SCHEDULE 2010 250 SX ...
Page 394: ...11 16 Repair manual KTM 250 300 Art No 3 206 088 E ...
Page 396: ...11 18 Repair manual KTM 250 300 Art No 3 206 088 E ...
Page 397: ...11 19 ...
Page 409: ...EXC 250 300 2005 EXC SIX DAYS 250 300 05 06 12 11 ...
Page 413: ...EXC 250 300 2005 EXC SIX DAYS 250 300 05 06 12 15 ...
Page 414: ...EXC USA 250 2005 12 16 Art No 3 206 088 E Repair manual KTM 250 300 ...
Page 416: ...12 18 Repair manual KTM 250 300 Art No 3 206 088 E ...
Page 430: ...Repair manual KTM 250 300 Art No 3 206 088 E 12 32 250 EXC EXC Six Days EU AUS 2008 2009 ...
Page 431: ...12 33 250 300 XC USA 2008 250 CX W ZA 2008 2009 ...
Page 433: ...12 35 300 EXC E EXC E SixDays EU AUS 2008 2009 ...
Page 437: ...12 39 250 SX 2010 ...
Page 438: ...12 40 Repair manual KTM 250 300 Art No 3 206 088 E ...
Page 439: ...12 41 250 EXC EU 2010 ...
Page 440: ...12 42 Repair manual KTM 250 300 Art No 3 206 088 E ...
Page 441: ...12 43 250 300 EXC 2010 ...
Page 442: ...12 44 Repair manual KTM 250 300 Art No 3 206 088 E ...
Page 443: ...12 45 250 300 XC XC W 2010 ...
Page 444: ...12 46 Repair manual KTM 250 300 Art No 3 206 088 E ...
Page 445: ...REPAIRMANUAL2004 2010 2004 2005 DCC ...
Page 553: ...1 7 T 14031 Dismounting mounting tool ...
Page 559: ...2 6 Exploded view PDS 5018 SXS SMR 2005 2006 ...
Page 561: ...2 8 Exploded view PDS 5018 SXS 2007 ...
Page 739: ...1 7 T 14 030 Adaptor T 14 033 Assembling tool ...
Page 741: ...2 2 Repair manual WP Fork Closed Cartridge Art No 3 211 199 E Exploded view SXS 2005 ...
Page 746: ...2 7 Exploded view SXS 2006 ...
Page 751: ...2 12 Repair manual WP Fork Closed Cartridge Art No 3 211 199 E Exploded view SX 2007 ...
Page 756: ...2 17 Exploded view Fork SXS 2007 ...