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9-2
Art.- No. 3.206.088-E
Repair manual KTM 250 / 300
TROUBLE SHOOTING
If you let the specified maintenance work on your motorcycle be carried out, disturbances can hardly
be expected. Should an error occur nevertheless, we advise you to use the trouble shooting chart in
order to find the cause of error.
CAUSE
Operating error
Fuel supply interrupted
Electrode distance too great
Plug fouled by oil, wet or bridged
Ignition wire or spark plug
connector damaged
Kill button wire or
short-circuit switch faulty
Loose ignition cable connectors
Spark too weak
Water in the carburetor and jets
blocked
Idle adjusting screw out of
adjustment
Ignition system damaged
Wear
Charred glass fiber yarn in silencer
Air filter blocked
Control flap does not work
Fuel supply partly interrupted or
blocked
Loss of compression through loose
spark plug
Exhaust system damaged
Engine doesn´t have enough preig-
nition
REMEDY
Open fuel tap, switch on ignition, refill fuel, do not use choke
Close fuel tap, loosen fuel hose at carburettor, lead into a
basin and open fuel tap,
–
if fuel leaks out, clean carburettor
–
if no fuel leaks out, check tank ventilation, i.e. clean
fuel tap
Reduce electrode distance (0.60 mm)
Clean spark plug or renew
Dismount spark plug, connect ignition cable, hold to ground
(blank place on engine) and kick the kickstarter, a strong
spark must be produced at the spark plug
– If no spark is produced, loosen spark plug cap from ignition
cable, hold about 5 mm from ground and kick the kick-
starter
– If a spark is produced, replace spark plug cap
– If no spark is produced, check the ignition system
Disconnect yellow-black coloured cable from CDI and check
ignition spark. If the spark is O.K. repair defective part of the
cable, ignition lock or ignition switch
Inspect cable connectors
Examine ignition system
Dismantle and clean carburetor
Readjust idle running or replace idle adjusting screw
Examine ignition system
Overhaul engine
Renew filling
Clean or renew airfilter
Check control flap, joint rod and centrifugal timer
Blow through fuel pipe and clean carburetor
Tighten spark plug
Check exhaust system for damage
Check and adjust ignition
TROUBLE
Engine fails to start
Engine fails to idle
Engine lacks power
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 ...