2008 YAMAHA YFM350R-W tires

7-5
7
WARNING
EWB01420Never consume alcohol or drugs before orwhile driving this ATV.
Pre-operation checks
Always perform the pre-operation checks listed on
page 5-1 before riding for proper care of the ATV
and to ensure safety.
WARNING
EWB01430Always inspect your ATV each time you use it
to make sure the ATV is in safe operating con-
dition. Always follow the inspection and main-
tenance procedures and schedules describedin the Owner’s Manual. Failure to inspect the
ATV before operating or failure to properly
maintain the ATV increases the possibility of
an accident or equipment damage.
WARNING
EWB01440Always use the size and type tires specified in
the Owner’s Manual for this ATV on page 5-4.
Always maintain proper tire pressure as de-
scribed in the Owner’s Manual on page 5-5.
Use of improper tires on this ATV, or operation
of this ATV with improper or uneven tire pres-
sure, may cause loss of control, increasingyour risk of an accident.
Do not operate at speeds too fast for your skills
or the conditions.
WARNING
EWB01450Always go at a speed that is proper for the ter-
rain, visibility and operating conditions, and
your experience. Operating this ATV at speeds
too fast for your skills or the conditions in-
creases your chances of losing control of theATV, which can result in an accident.
U10P60E0.book Page 5 Thursday, June 15, 2006 4:19 PM

7-13
7
WARNING
EWB01720Always open the throttle gradually and release
the clutch lever slowly. Otherwise, the ATV
could wheelie which would increase thechance of an accident.CAUTION:ECB00230Do not shift gears without releasing the throt-
tle. Damage to the engine or drive train may oc-cur.
When slowing down or stopping, release the throt-
tle and apply the brakes smoothly and evenly. As
you slow down, shift to a lower gear. Be sure that
the engine has sufficiently slowed before engaging
a lower gear. Improper use of the brakes or shifting
can cause the tires to lose traction, reducing con-
trol and increasing the possibility of an accident.
WARNING
EWB01560Make sure the engine has sufficiently slowed
before shifting to a lower gear. Engaging a low-
er gear when the engine speed is too highcould cause the wheels to stop rotating.TURNING YOUR ATV
To achieve maximum traction on unpaved surfac-
es, the two rear wheels are mounted solidly on one
axle and turn together at the same speed. There-
fore, unless the wheel on the inside of the turn is al-
lowed to slip or lose some traction, the ATV will
resist turning. A special turning technique must be
used to allow the ATV to make turns quickly and
easily. It is essential that this skill be learned first at
low speed.
WARNING
EWB01570Always follow proper procedures for turning
as described in this Owner’s Manual. Practice
turning at low speeds before attempting to turn
at faster speeds. Do not turn at speeds too fastfor your skills or the conditions.
As you approach a curve, slow down and begin to
turn the handlebars in the desired direction. As you
do so, put your weight on the footboard to the out-
side of the turn (opposite your desired direction)
and lean your upper body into the turn. Use the
throttle to maintain an even speed through the turn.
This maneuver will let the wheel on the inside of
the turn slip slightly, allowing the ATV to make the
turn properly.
U10P60E0.book Page 13 Thursday, June 15, 2006 4:19 PM

7-20
7
WARNING
EWB01640Never operate this ATV in fast flowing water or
in water deeper than that specified in your
Owner’s Manual. Remember that wet brakes
may have reduced stopping ability. Test your
brakes after leaving water. If necessary, apply
them several times to let friction dry out the lin-
ings. If the ATV is operated through deep or
fast flowing water, the tires may float, causing
loss of traction and loss of control, whichcould lead to an accident.
Test your brakes after leaving the water. Do not
continue to ride your ATV without verifying that you
have regained proper braking ability.U10P60E0.book Page 20 Thursday, June 15, 2006 4:19 PM

8-4
8
7*Rear brakeCheck operation and correct if necessary.
Check fluid level and ATV for fluid leakage, and
correct if necessary.√√√√√
Replace brake pads. Whenever worn to the limit
8*Brake hosesCheck for cracks or other damage, and replace if
necessary.√√√√
Replace. Every 4 years
9*Parking bra keCheck operation and adjust if necessary.√√√√√
10*WheelsCheck runout and for damage, and replace if nec-
essary.√ √√√
11*TiresCheck tread depth and for damage, and replace if
necessary.
Check air pressure and balance, and correct if
necessary.√ √√√
12*Wheel bearingsCheck for looseness or damage, and replace if
necessary.√ √√√
13*Swingarm pivotsCheck operation and for excessive play, and re-
place bearings if necessary.
Lubricate with lithium-soap-based grease.√√√
14*Upper and lower
arm pivotsLubricate with lithium-soap-based grease.√√√
15 Drive chainCheck chain slack and adjust if necessary.
Check rear wheel alignment and correct if necess-
sary.
Clean and lubricate.√√√√√ NO. ITEMCHECK OR MAINTENANCE
JOBINITIAL EVERY
Whichev-
er comes
firstmonth136612
km
(mi)320
(200)1200
(750)2400
(1500)2400
(1500)4800
(3000)
hours 20 75 150 150 300U10P60E0.book Page 4 Thursday, June 15, 2006 4:19 PM

8-27
8 2. To increase the clutch lever free play, turn the
adjusting bolt at the clutch lever in direction
(a), and to decrease it, turn the bolt in direction
(b).
3. Tighten the locknut at the clutch lever.
If the specified free play cannot be obtained,
proceed with the following steps.
4. Loosen the locknut at the clutch lever.
5. Fully turn the adjusting bolt at the clutch lever
in direction (a) to loosen the clutch cable.
6. Loosen the locknut at the crankcase.
7. To increase the clutch lever free play, turn the
adjusting nut at the crankcase in direction (a),
and to decrease it, turn the nut in direction (b).8. Tighten the locknut at the crankcase and the
clutch lever.
NOTE:If the specified free play cannot be obtained as de-
scribed above or if the clutch does not operate cor-
rectly, have a Yamaha dealer check the internalclutch mechanism.EBU28142Drive chain slack The drive chain slack should be checked before
each ride and adjusted if necessary.
To check the drive chain slack
1. Place the ATV on a level surface.NOTE:When checking and adjusting the drive chain
slack, there should be no weight on the ATV andall tires must be touching the ground.
2. Move the ATV back and forth to locate the
tightest portion of the drive chain, and then
measure the drive chain slack as shown.
1. Locknut
2. Clutch lever free play adjusting nut (crankcase)
Drive chain slack:
25.0–35.0 mm (0.98–1.38 in)
U10P60E0.book Page 27 Thursday, June 15, 2006 4:19 PM

9-3
9b. Pour a teaspoonful of engine oil into the
spark plug bore.
c. Install the spark plug cap onto the spark
plug, and then place the spark plug on the
cylinder head so that the electrodes are
grounded. (This will limit sparking during
the next step.)
d. Turn the engine over several times with the
starter. (This will coat the cylinder wall with
oil.)
e. Remove the spark plug cap from the spark
plug, and then install the spark plug and
the spark plug cap.
6. Lubricate all control cables and the pivoting
points of all levers and pedals.
7. Check and, if necessary, correct the tire air
pressure, and then block up the ATV so that
all of its wheels are off the ground. Alternative-
ly, turn the wheels a little every month in order
to prevent the tires from becoming degraded
in one spot.
8. Cover the muffler outlet with a plastic bag to
prevent moisture from entering it.
9. Remove the battery and fully charge it. Store
it in a cool, dry place and charge it once a
month. Do not store the battery in an exces-sively cold or warm place [less than 0 °C (30
°F) or more than 30 °C (90 °F)]. For more in-
formation on storing the battery, see page
8-35.
NOTE:Make any necessary repairs before storing theATV.
U10P60E0.book Page 3 Thursday, June 15, 2006 4:19 PM

10-3
10
Caster angle:
6.0 °
Trail:
26.0 mm (1.02 in)Front tire:Type:
Tubeless
Size:
AT21 x 7-10
Manufacturer:
MAXXISRear tire:Type:
Tubeless
Size:
AT20 x 10-9
Manufacturer:
MAXXISLoading:Maximum loading limit:
100.0 kg (220 lb)
(Total weight of rider, cargo, accessories, and tongue)Tire air pressure (measured on cold tires):Recommended:
Front:
25.0 kPa (3.6 psi) (0.250 kgf/cm²)
Rear:
25.0 kPa (3.6 psi) (0.250 kgf/cm²)
Minimum:
Front:
22.0 kPa (3.2 psi) (0.220 kgf/cm²)Rear:
22.0 kPa (3.2 psi) (0.220 kgf/cm²)
Maximum:
Front:
28.0 kPa (4.1 psi) (0.280 kgf/cm²)
Rear:
28.0 kPa (4.1 psi) (0.280 kgf/cm²)
Front wheel:Wheel type:
Panel wheel
Rim size:
10 x 5.5ATRear wheel:Wheel type:
Panel wheel
Rim size:
9 x 8.5ATFront brake:Type:
Dual disc brake
Operation:
Right hand operation
Recommended fluid:
DOT 4Rear brake:Type:
Single disc brake
Operation:
Right foot operation
Recommended fluid:
DOT 4
U10P60E0.book Page 3 Thursday, June 15, 2006 4:19 PM

License plate light bulb, replacing ................................ 8-39
Light switch .................................................................... 4-4MMain switch .................................................................... 4-1
Model label ................................................................... 11-1NNeutral indicator light ..................................................... 4-2OOwner’s manual and tool kit ........................................... 8-1PParking ........................................................................... 6-7
Parking brake free play, adjusting ................................ 8-24
Parking brake lever ........................................................ 4-7
Parking on a slope ......................................................... 6-8
Part locations ................................................................. 3-1
Periodic maintenance and lubrication chart ................... 8-3
Pre-operation check list .................................................. 5-1RReverse indicator light .................................................... 4-2
Riding your ATV ............................................................. 7-1SSafety information .......................................................... 1-1
Seat .............................................................................. 4-14
Shifting ........................................................................... 6-4
Shift pedal ...................................................................... 4-8
Shock absorber assemblies, adjusting the front .......... 4-14
Shock absorber assembly, adjusting the rear .............. 4-16
Spark arrester, cleaning ............................................... 8-16
Spark plug, checking ...................................................... 8-8
Specifications ............................................................... 10-1
Speed limiter .................................................................. 4-5
Speedometer .................................................................. 4-2Starter (choke) ............................................................. 4-12
Start switch ..................................................................... 4-3
Steering lock ................................................................ 4-13
Steering shaft, lubricating ............................................. 8-35
Storage ........................................................................... 9-2
Suspension, lubricating the upper and lower arm
pivots ......................................................................... 8-34
Suspension relay arm and connecting arm pivoting
points, lubricating the rear ......................................... 8-33
Swingarm pivots, lubricating ........................................ 8-32
TTail/brake light bulb, replacing ..................................... 8-38
Throttle cable free play, adjusting ................................ 8-19
Throttle lever ........................................................... 4-4, 5-4
Tire pressure, measuring ............................................... 5-5
Tires ............................................................................... 5-4
Tire wear limit ................................................................. 5-6
Troubleshooting ........................................................... 8-42
Troubleshooting chart .................................................. 8-43
Turn signal indicator light ............................................... 4-2
Turn signal light bulb, replacing ................................... 8-38
Turn signal switch .......................................................... 4-4VValve clearance ............................................................ 8-19
Vehicle identification number ....................................... 11-1WWheel bearings, checking ............................................ 8-32
Wheel, installing ........................................................... 8-41
Wheel, removing .......................................................... 8-40
U10P60E0.book Page 2 Thursday, June 15, 2006 4:19 PM