2010 YAMAHA YFM350R check engine

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Page 64 of 138

YAMAHA YFM350R 2010  Owners Manual 7-8
7WARNING! Operating this ATV with improper
modifications may cause changes in handling
which in some situations could lead to an acci-
dent.
 [EWB01491]
Exhaust system
WARNING
EWB01501Dry grass o

Page 82 of 138

YAMAHA YFM350R 2010  Owners Manual 8-3
8
EBU21743Periodic maintenance chart for the emission control system TIPFor ATVs not equipped with an odometer or an hour meter, follow the month maintenance intervals.For ATVs equipped with an

Page 86 of 138

YAMAHA YFM350R 2010  Owners Manual 8-7
8
15*Shock absorber as-
sembliesCheck operation and correct if necessary.
Check for oil leakage and replace if necessary.√√√
16*Rear suspension re-
lay arm and con-
necting arm 
pivoting p

Page 88 of 138

YAMAHA YFM350R 2010  Owners Manual 8-9
8
EBU23212Checking the spark plug The spark plug is an important engine component,
which is easy to check. Since heat and deposits
will cause any spark plug to slowly erode, the spark
plug should

Page 89 of 138

YAMAHA YFM350R 2010  Owners Manual 8-10
8
TIPIf the spark plug shows a distinctly different color,
the engine could be operating improperly. Do not
attempt to diagnose such problems yourself. In-
stead, have a Yamaha dealer check the A

Page 90 of 138

YAMAHA YFM350R 2010  Owners Manual 8-11
8
TIPIf a torque wrench is not available when installing
a spark plug, a good estimate of the correct torque
is 1/4–1/2 turn past finger tight. However, the spark
plug should be tightened to th

Page 92 of 138

YAMAHA YFM350R 2010  Owners Manual 8-13
8
TIPSkip steps 5–9 if the oil filter element is not being
cleaned.5. Remove the oil filter element cover by remov-
ing the bolts, and then remove the oil filter el-
ement.6. Clean the oil stra

Page 94 of 138

YAMAHA YFM350R 2010  Owners Manual 8-15
812. Start the engine, and then let it idle for several
minutes while checking it for oil leakage. If oil
is leaking, immediately turn the engine off and
check for the cause.
13. Turn the engine
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