KTM 65 SX 2005, Owner'S Manual

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ENGLISH
32
TROUBLE SHOOTING
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TROUBLE CAUSE REMEDY
Engine has not enough power Reed paddles tensionless or dam-
aged, surface of reed valve housing
damaged
Wear
Replace reed paddles or reed valve housing
Overhaul engine
Engine revs not up and running
in four stroke cycle Carburetor overflows if level adjust
too high, float needle seating is
dirty or enlarged
Loose carburetor jets
Clean carburetor, if necessary replace float needle and
adjust level
Tighten jets
High rpm misfiring Incorrect heat range spark plug or
low quality spark plug
Loose, corroded or non conductive
ignition socket connector
Refer to technical data section
Check and seal with silicon
Engine spluters into the
carburetor Lack of fuel
Spark plug with incorrect heat
value (Ignition by incandescence)
Engine takes air out of control
Clean fuel pipes, examine tank aeration and clean
Fit correct spark plug
Check intake flange and carburettor if firmly setted
Engine overheating Insufficient liquid in cooling
system
Radiator fins clogged
Frothing in cooling system
Pinched or kinked water hoses
Incorrect ignition timing because
of loose stator screws
Incorrect compression ratio
Top up coolant and bleed cooling system check cooling sys-
tem for leaks
Clean radiatar fins with water jet
Renew coolant using branded anti-freeze/anti-corrosive
(Motorex Anti-Freeze)
Replace with correct routed hoses
Readjust to correct ignition timing specifications, secure
screws with Loctite 243
Measure and adjust compression ratio
Emission of white smoke
(steam) Cylinder head or O-ring of cylinder
head gasket leaks Check cylinder head, replace O-ring
Excessive oil escapes from
transmission breather tube Excessive oil quantity
in transmission Correct transmission oil level
Water in transmission oil Shaft seal ring of the water pump
defect Replace shaft seal ring of the water pump