2005 YAMAHA YFM350R check engine

8-17 1. Dipstick
2. Maximum level mark
3. Minimum level mark
4. Engine oil filler cap
1. Jauge
2. Repère de niveau maximum
3. Repère de niveau minimum
4. Bouchon de remplissage d’huile de moteur
1. Varilla
2. Marca de nivel máximo
3. Marca de nivel mínimo
4. Tapa del filtro de aceite de motor
EBU11812
Engine oil and oil filter element
The engine oil level should be checked before
each ride. In addition, the oil must be changed and
the oil filter element cleaned at the intervals speci-
fied in the periodic maintenance and lubrication
chart.
To check the engine oil level
1. Place the ATV on a level surface.
2. Warm up the engine for several minutes, and
then turn it off.
3. Wait a few minutes until the oil level settles
before checking.
4. Remove the engine oil filler cap, and then
wipe the dipstick off with a clean rag. Insert
the dipstick in the filler hole (without screwing
it in), and then remove it again to check the oil
level.NOTE:_ The oil level should be between the minimum and
maximum level marks. _
U5YT61.book Page 17 Wednesday, April 7, 2004 3:59 PM

8-21 1. Engine oil filter cover 2. Bolt (× 3)
3. Engine oil filter element 4. O-ring
1. Couvercle du filtre à huile de moteur 2. Boulon (× 3)
3.Élément du filtre à huile de moteur
4. Joint torique
1. Tapa del filtro de aceite de motor 2. Perno (× 3)
3. Elemento del filtro de aceite de motor
4. Junta tórica
NOTE:_ Skip steps 5–9 if the oil filter element is not being
cleaned. _5. Remove the oil filter cover by removing the
bolts, and then remove the oil filter element.
6. Clean the oil strainer and oil filter element
with solvent.
7. Check the O-ring for damage and replace it if
necessary.
8. Install the oil filter element and O-ring.NOTE:_ Make sure the O-ring is seated properly. _9. Install the oil filter cover by installing the bolts,
and then tighten them to the specified torque.
U5YT61.book Page 21 Wednesday, April 7, 2004 3:59 PM

8-27
12. Start the engine, and then let it idle for seve-
ral 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 off, and then check the oil
level and correct it if necessary.
U5YT61.book Page 27 Wednesday, April 7, 2004 3:59 PM

8-39
NOTE:_ The air filter element should be cleaned every 20–
40 hours. It should be cleaned and lubricated more
often if the machine is operated in extremely dusty
areas. Each time the air filter element mainte-
nance is performed, check the air inlet to the filter
case for obstructions. Check the air filter case rub-
ber joint to the carburetor and manifold fittings for
an airtight seal. Tighten all fittings securely to
avoid the possibility of unfiltered air entering the
engine. _CAUTION:_ Never operate the engine with the air filter ele-
ment removed. This will allow unfiltered air to
enter, causing rapid engine wear and possible
engine damage. Additionally, operation with-
out the air filter element will affect carburetor
jetting with subsequent poor performance and
possible engine overheating. _
U5YT61.book Page 39 Wednesday, April 7, 2004 3:59 PM

8-109
EBU00440
Troubleshooting chart1. Fuel
Check if there is fuel
in the fuel tank.There is fuel.Turn the fuel cock
lever to “OFF”.No fuel.Fuel cock is
clogged.
Clean the
fuel cock. Some fuel.Turn the fuel cock
lever to “RES”.Restart the engine.
No fuel.Supply fuel.
2. Compression
Use the electric
starter to see if
there is compression.There is compression.
Compression normal.
No compression.Ask a Yamaha dealer to
inspect.
3. Ignition
Remove the
spark plug and
check the electrodes.WetWipe clean with dry cloth.
DryAttach spark plug cap and
ground to chassis.Use the
electric starter.Spark is good.Ignition system is
normal.
Spark is weak.
Adjust the spark plug gap
or replace the spark plug. No spark.
Ask a Yamaha dealer to
inspect. 4. Battery
Use the electric starter.Engine turns over
quickly.Battery is good.
Engine turns over
slowly.Check the battery lead connections,
and charge the battery if necessary.Check the
fuel flow.
Turn the fuel cock
lever to “ON”.
Remove the fuel hose
from the fuel cock.
U5YT61.book Page 109 Wednesday, April 7, 2004 3:59 PM