TROUBLESHOOTING
92
Faults
Possible cause
Action
Engine has a lack of power
Air filter severly contaminated
–
Clean the air filter.
x
(
p. 82)
Exhaust system leaky, deformed or
too little glass fiber yarn filling in
main silencer
–
Check exhaust system for damage.
–
Change glass fiber yarn filling of main
silencer.
x
Valve clearance too little
–
Adjust the valve clearance.
x
Ignition system defective
–
Check the ignition coil.
x
–
Check the CDI controller.
x
–
Check the spark plug connector.
x
–
Check the ignition pulse generator.
x
–
Check the generator.
x
Engine stalls or pops back into the
carburetor
Lack of fuel
(EXC
‑
F, EXC
‑
F SIX DAYS, XCF-W)
–
Turn handle
of the fuel tap to the
ON
position. (Figure 500137-10
p. 22)
(SX
‑
F)
–
Turn handle
of the fuel tap to the
ON
position. (Figure 500178-10
p. 22)
–
Refuel. (
p. 33)
The intake system has an air leak
–
Check rubber sleeves and carburetor for tight-
ness.
Engine overheats
Coolant level low in cooling system
–
Check the cooling system for leaks.
–
Check the coolant level. (
p. 79)
Insufficient airflow
–
Switch off engine when stationary.
Radiator fins very dirty
–
Clean radiator fins.
Foam formation in cooling system
–
Drain the coolant.
x
(
p. 80)
–
Refill the coolant.
x
(
p. 80)
Bent radiator hose
–
Change the radiator hose.
x
Thermostat defective
–
Check the thermostat.
x
Guideline
Opening temperature: 70 °C (158 °F)
Defect in radiator fan system (XCF-W,
250 EXC-F SIX DAYS EU)
–
Check the radiator fan fuse.
–
Check the radiator fan.
x
–
Check the thermostat.
x
High oil consumption
Engine vent hose bent
–
Route the vent hose without bends or replace it
if necessary.
Engine oil level too high
–
Check the engine oil level. (
p. 87)
Engine oil too thin (low viscosity)
–
Change the engine oil and oil filter, clean the
oil screen.
x
(
p. 87)
Piston or cylinder is worn
–
Piston/cylinder - determine the mounting clear-
ance
x
Battery discharged
The battery does not charge
–
Check the charging voltage.
x
–
Check the charging current.
x
–
Check the generator.
x
Undesired power consumer
–
Check the stall current.
x
Speedometer values deleted (time,
stop watch, lap times)
The battery in the speedometer is
empty.
–
Change the battery in the speedometer.
Summary of Contents for 2010 250 EXC-F AUS
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