2009 YAMAHA YFM90R fuel

TABLE OF CONTENTS
SAFETY INFORMATION..............................1-1
LOCATION OF THE WARNING AND
SPECIFICATION LABELS............................2-1DESCRIPTION ..............................................3-1 Left view.....................................................3-1Right view...................................................3-1
Controls and instruments...........................3-2
INSTRUMENT AND CONTROL
FUNCTIONS..................................................4-1 Main switch...............................................4-1
Handlebar switches ................................... 4-2
Throttle lever ............................................. 4-3
Speed limiters............................................. 4-3
Front brake lever ........................................ 4-6
Rear brake lever ....................................... 4-6
Parking brake ............................................ 4-7
Fuel tank cap ............................................ 4-8 Fuel ........................................................... 4-8
Fuel cock .............................................. 4-10
Choke ..................................................... 4-11
Seat ........................................................ 4-11
PRE-OPERATION CHECKS.........................5-1 Pre-operation check list............................5-1
Fuel ........................................................... 5-3
Engine oil .................................................. 5-3
Final transmission oil ................................ 5-3
Front and rear brakes ............................... 5-3
Throttle lever ............................................. 5-4
Tires .......................................................... 5-4
Measuring the tire pressure ...................... 5-5
Tire wear limit ........................................... 5-6
Chassis fasteners ..................................... 5-7
Instruments and switches ......................... 5-7
OPERATION................................................6-1 Starting a cold engine ............................... 6-1
Starting a warm engine ............................. 6-3
Engine break-in ........................................ 6-4
Parking ..................................................... 6-4
Parking on a slope ................................... 6-5
Accessories and loading .......................... 6-6
Vehicle speed limiter ................................. 4-4
Engine speed limiter plate.......................... 4-5 Kick starter
............................................. 4-12

1-3
1
Avoid crossing the side of a steep hill if possible.Always use proper procedures if you stall or roll
backwards when climbing a hill. To avoid stall-
ing, use the proper gear and maintain a steady
speed when climbing a hill. If you stall or roll
backwards, follow the special procedure for
braking described in this manual. Dismount on
the uphill side or to a side if pointed straight up-
hill. Turn the ATV around and remount, following
the procedure described in this manual.Always check for obstacles before operating in a
new area.Never attempt to operate over large obstacles,
such as large rocks or fallen trees. Always follow
proper procedures when operating over obsta-
cles as described in this manual.Always be careful when skidding or sliding.
Learn to safely control skidding or sliding by
practicing at low speeds and on level, smooth
terrain. On extremely slippery surfaces, such as
ice, go slowly and be very cautious in order to re-
duce the chance of skidding or sliding out of con-
trol.Never operate an ATV in fast flowing water or in
water deeper than that recommended in this
manual. Remember that wet brakes may havereduced stopping ability. Test your brakes after
leaving water. If necessary, apply them several
times to let friction dry out the linings.
Always use the size and type of tires specified in
this manual.Always maintain proper tire pressure as de-
scribed in this manual.Never modify an ATV through improper installa-
tion or use of accessories.Never exceed the stated load capacity for an
ATV. Cargo should be properly distributed and
securely attached. Reduce speed and follow in-
structions in this manual for carrying cargo or
pulling a trailer. Allow greater distance for brak-
ing.
WARNING
Always turn off the engine when refueling.Do not refuel right after the engine has been
running and is still very hot.Do not spill gasoline on the engine or ex-
haust pipe/muffler when refueling. Never re-
fuel while smoking, or in the vicinity of
sparks, open flames, or other sources of ig-
nition such as the pilot lights of water heat-
ers and clothes dryers. Gasoline can catch

1-4
1
fire and you could be burned.When transporting the ATV in another vehi-
cle, be sure it is kept upright and that the fuel
cock is in the “OFF” position. Otherwise, fuel
may leak out of the carburetor or fuel tank.Gasoline is poisonous. If you should swal-
low some gasoline or inhale a lot of gasoline
vapor, or get some gasoline in your eyes,
seek medical help immediately. If gasoline
spills on your skin, wash with soap and wa-
ter. If gasoline spills on your clothing,change your clothes.
WARNING
Always operate your ATV in an area with ade-
quate ventilation. Never start or run the engine
in a closed area. Exhaust fumes are poisonous
and may cause loss of consciousness and
death within a short time.

3-1
3

DESCRIPTION
Left viewRight view1. Fuel cock
2. Rear wheel
3. Footrest 4. Front wheel 1. Spark arrester
2. Seat
3. Footrest
1
4 32
1
2
3

3-2
3
Controls and instruments1. Rear brake lever
2. Parking brake
3. Front brake lever
4. Throttle lever
5. Main switch6. Fuel tank cap7. Handlebar switches
8. Choke
1 2 3
8 7 6 5
4
TIPThe ATV you have purchased may differ slightly
from the figures shown in this manual.

4-8
Fuel tank cap Remove the fuel tank cap by turning it counter-
clockwise.FuelMake sure that there is sufficient fuel in the tank.
Fill the fuel tank to the bottom of the filler tube as
shown.1.Fuel tank cap 1. Fuel level
2. Filler tube
Recommended fuel:
UNLEADED GASOLINE ONLY
Fuel tank capacity: 4.8 L (1.27 US gal) (1.06 Imp.gal)
Fuel reserve amount: 1.0 L (0.26 US gal) (0.22 Imp.gal)
4
1
1 2

4-9
N O T I C EUse only unleaded gasoline. The use of leaded
gasoline will cause severe damage to internal
engine parts, such as the valves and pistonrings, as well as to the exhaust system.
4
WARNING
Do not overfill the fuel tank. Fuel expands
when it heats up. If the fuel tank is overfilled,
fuel could spill out due to heat from the en-
gine 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 securely.

Fuel cock The fuel cock supplies fuel from the tank to the car-
buretor while also filtering it.
The fuel cock lever positions are explained as fol-
lows and shown in the illustrations.1. Lever positioned over “OFF”
RES
OFFWith the fuel cock lever in this position, fuel will not
flow. Always turn the fuel cock lever to this position
when the engine is not running.ONRES
5
1. Lever positioned over “RES”
1. Lever positioned over “ON” 4-10 With the fuel cock lever in this position, fuel flows
to the carburetor. Turn the fuel cock lever to this
position when starting the engine and riding.
This indicates reserve. With the fuel cock lever in
this position, the fuel reserve is made available.
Turn the fuel cock lever to this position if you run
out of fuel while riding. When this occurs, refuel as
soon as possible and be sure to turn the fuel cock
lever back to “ON”!
OFF
ON
RES
FUEL
1OFF
OFF
ON
RES
FUELRES
1
OFF
ON
RES
FUEL
1
ON
4