9-3
TROUBLE
Engine lacks power
Engine does not rev high
High rpm misfiring
Engine splutters
Engine overheating
Emission of white smoke
(steam)
Excessive oil escapes
from transmission
breather tube
All switched on lamps
blown out
CAUSE
Reed paddles tensionless or
damaged, surface of reed valve
housing damaged
Wear
Electronical ignition timing faulty
Carburetor overflows if level is
adjusted too high, float needle
seating is dirty or enlarged
Loose carburetor jets
Incorrect heat range spark plug or
low quality spark plug
Incorrect or faulty spark plug
connector
Loose, corroded or non conductive
ignition socket connector
Lack of fuel
Spark plug with incorrect heat
value (Ignition by incandescence)
Engine takes air out of control
Insufficient liquid in cooling
system
Cooling system not or insuffi-
ciently bled
Radiator fins clogged
Frothing in cooling system
Pinched or kinked water hoses
Incorrect ignition timing because
of loose stator bolts
Incorrect dimension “X”
Cylinder head or O-ring of cylinder
head gasket leaks
Excessive oil quantity in trans-
mission
Water pump shaft seal ring or
right-hand crankshaft seal ring
defect
Silicon O-rings of control roller or
of control flap leaks
Voltage regulator faulty
REMEDY
Replace reed paddles or reed valve housing
Overhaul engine
Check ignition system
Clean carburetor, if necessary replace float needle and
adjust level
Tighten jets
Refer to technical data section
Test and/or replace spark plug connectors with correct type
Check and seal with silicon
Clean fuel pipes, examine tank aeration and clean
Fit correct spark plug
Check intake flange and carburettor if firmly setted
Top up coolant and bleed cooling system check cooling
system for leaks
Bleed cooling system (see operating instructions)
Clean radiator with water jet
Renew coolant using branded anti-freeze/anti-corrosive
Replace with correct routed hoses
Readjust to correct ignition timing specifications, secure
screws properly with Loctite 243
Measure and adjust to correct specifications
Check cylinder head, replace O-ring
Correct transmission oil level
Replace shaft seal ring and change gear oil, check coolant
Replace O-rings
Check control connections of voltage regulator.
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 ...