2001 YAMAHA YFM600FWA fuel

5-11
EBU00128
Fuel
Make sure there is sufficient gasoline in the
tank.
NOTE:
(for Europe only)
1. If knocking or pinging occurs, use a differ-
ent brand of gasoline or higher octane
grade.
2. If unleaded gasoline is not available, then
leaded gasoline can be used. Recommended fuel: Regular gasoline
For Europe: Regular unleaded gasoline
with a research octane
number of 91 or higher.
For Australia: Unleaded fuel only
Fuel tank capacity:
Total:
19 L
Reserve:
3 L

5-13
1. Fuel level 2. Filler tube
1. Niveau de carburant 2. Tube de remplissage
1. Nivel de combustible 2. Tubo del relleno
WARNING
●Do not overfill the fuel tank. Fuel expands
when it heats up. If the fuel tank is over-
filled, fuel could spill out due to heat from
the engine or the sun.
●Be careful not to spill fuel, especially on
the engine or exhaust pipe which can
cause a fire and severe injury. Wipe up
any spilled fuel immediately.
●Do not refuel right after the engine has
been running and is still very hot.
●Be sure the fuel tank cap is closed secure-
ly.

6-3
EBU00506
Starting a cold engine
WARNING
Always make sure all control cables work
smoothly before you begin riding in cold
weather. If the control cables are frozen or do
not work smoothly, you could be unable to
control the ATV, which could lead to an acci-
dent or collision.
1. Set the parking brake.
2. Turn the fuel cock to “ON”.
3. Turn the main switch to “ON” and the en-
gine stop switch to “RUN”.
4. Shift the transmission into neutral.

6-19
1. 0 ~ 10 hours:
Avoid continuous operation above half
throttle. Allow a cooling off period of five
to ten minutes after every hour of opera-
tion. Vary the speed of the machine from
time to time. Do not operate it at one set
throttle position.
2. 10 ~ 20 hours:
Avoid prolonged operation above 3/4
throttle. Rev the machine freely but do not
use full throttle at any time.
3. After break-in:
Avoid prolonged full throttle operation.
Vary speeds occasionally.
EBU00211
Parking
When parking, stop the engine and shift into
neutral. Turn the fuel cock to “OFF” and apply
the parking brake.
1. Lock plate
1. Verrou
1. Placa de bloqueo

8-7
EBU00262
PERIODIC MAINTENANCE/LUBRICATION
ITEM ROUTINEINITIAL EVERY
1
month3
months6
months6
months1
year
Valves*• Check valve clearance.
• Adjust if necessary.
Spark plug• Check condition.
• Adjust gap and clean.
• Replace if necessary.
Air filter• Clean.
• Replace if necessary.Every 20~40 hours
(More often in wet or dusty areas.)
Carburetor*• Check idle speed/starter operation.
• Adjust if necessary.
Crankcase breather
system*• Check breather hose for cracks or damage.
• Replace if necessary.
Exhaust system*• Check for leakage.
• Retighten if necessary.
• Replace gasket(s) if necessary.
Fuel line*• Check fuel hose for cracks or damage.
• Replace if necessary.
Engine oil• Replace (Warm engine before draining).
Engine oil filter• Replace.
Engine oil strainer*• Clean.
Final gear oil• Check oil level/oil leakage.
• Replace every 12 months.
Differential gear oil
Front brake*• Check operation/fluid leakage/see NOTE page 8-8.
• Correct if necessary.
Rear brake*• Check operation.
• Adjust if necessary.
V-belt*• Check operation.
• Check for cracks or damage every 12 months or
2,400 km whichever comes first.

8-49
EBU00303
Valve clearance adjustment
The correct valve clearance changes with use,
resulting in improper fuel/air supply or engine
noise. To prevent this, the valve clearance
must be adjusted regularly. This adjustment
however, should be left to a professional
Yamaha service technician.
EBU00307
Throttle lever adjustment
NOTE:
Adjust the engine idling speed before adjust-
ing the throttle lever free play.
1. Loosen the locknut.
2. Turn the adjusting bolt until the throttle le-
ver free play is 3 ~ 5 mm.
3. Tighten the locknut.
1. Locknut 2. Adjusting bolt a. Free play
1. Contre-écrou 2. Boulon de réglage a. Jeu
1. Contratuerca 2. Perno de ajuste a. Juego libre

8-85
EBU00413
Troubleshooting
Although Yamaha machines receive a rigid in-
spection before shipment from the factory,
trouble may occur during operation.
Any problem in the fuel, compression, or igni-
tion systems can cause poor starting and loss
of power. The troubleshooting chart describes
a quick, easy procedure for making checks. If
your machine requires any repair, take it to a
Yamaha dealer.
The skilled technicians at a Yamaha dealership
have the tools, experience, and know-how to
properly service your machine. Use only genu-
ine Yamaha parts on your machine. Imitation
parts may look like Yamaha parts, but they are
often inferior. Consequently, they have a short-
er service life and can lead to expensive repair
bills.
WARNING
Do not smoke when checking the fuel system.
Fuel can ignite or explode, causing severe inju-
ry or property damage. Make sure there are no
open flames or sparks in the area, including pi-
lot lights from water heaters or furnaces.

8-87
EBU00440
Troubleshooting chart
1. Fuel
Check if there is fuel
in the fuel tank.Enough fuelTurn the fuel
cock to “OFF”.Remove the fuel pipe
from the fuel cock. No fuelFuel cock
clogged
Clean fuel
cock. Some fuelTurn the fuel
cock to “RES”.Restart engine.
No fuel
Supply fuel
2. Compression
Use the electric
starter to see if there
is compression.Compression
Compression normal
No compression
Ask a Yamaha dealer to inspect.
3. Ignition
Remove the plug and
check the electrode.WetWipe clean with
dry cloth.
DryAttach plug cap and
ground to chassis.Use the
electric starter.Spark goodIgnition system
normal
Spark weak
Adjust plug gap
or replace plug. No spark
Ask a Yamaha dealer to inspect. 4. Battery
Use the electric
starter.Engine turns over
quickly.Battery good
Engine turns over
slowly.
Recharge, check
connections.
Check fuel
flow Turn the fuel
cock to “ON”.