torque YAMAHA YFM350R 2003 Owners Manual

4-33 1. Special wrench
1. Clé spéciale
1. Llave especial
A. Spring length
A. Longueur du ressort
A. Longitud del muelle
NOTE:_ A special wrench can be obtained at a Yamaha
dealer to make this adjustment. _3. The length of the spring (installed) changes
1 mm per turn of the adjusting ring.CAUTION:_ Never attempt to turn the adjusting ring be-
yond the maximum or minimum settings. _4. Tighten the locknut to the specified torque.Measurement
A:
Installed length:
Standard: 228.5 mm
Minimum (hard): 220.5 mm
Maximum (soft): 235.5 mm
Tightening torque:
51 Nm (5.1 m·kgf)
U5NF62.book Page 33 Wednesday, May 8, 2002 1:40 PM

4-35 1. Damping force adjusting screw
1. Vis de réglage de la force d’amortissement
1. Tornillo de ajuste de la fuerza de amortiguación
CAUTION:_ Always tighten the locknut against the spring
preload adjusting ring, and then tighten it to
the specified torque. _Adjust the damping force as follows:
Turn the adjusting screw in direction
a to increase
damping force and in direction
b to decrease
damping force.CAUTION:_ Never attempt to turn an adjusting mechanism
beyond the maximum or minimum settings. _
Standard: 15 clicks out*
Minimum (soft): 20 clicks out*
Maximum (hard): fully turned-in position
*From the fully turned-in position
U5NF62.book Page 35 Wednesday, May 8, 2002 1:40 PM

5-17
EBU01083
Throttle lever
Check to see that the throttle lever operates cor-
rectly. It must open smoothly and spring back to
the idle position when released. Have a Yamaha
dealer repair as necessary for proper operation.
EBU01162
Fittings and fasteners
Always check the tightness of chassis fittings and
fasteners before a ride. Take the machine to a
Yamaha dealer or refer to the Service Manual for
correct tightening torque.
EBU01003
Lights
Check the headlights and tail/brake light to make
sure they are in working condition. Repair as nec-
essary for proper operation.
EBU01170
Switches
Check the operation of all switches. Have a
Yamaha dealer repair as necessary for proper op-
eration.
U5NF62.book Page 17 Wednesday, May 8, 2002 1:40 PM

8-3 1. Owner’s manual
2. Low-pressure tire gauge
3. Owner’s tool kit
1. Manuel du propriétaire
2. Manomètre basse pression pour pneus
3. Trousse à outils
1. Manual del propietario
2. Manómetro de baja presión
3. Equipo de herramientas
EBU01222
Owner’s manual and tool kit
You are recommended to put this owner’s manual
and low-pressure tire gauge in the vinyl bag and
always carry them along with the owner’s tool kit
under the seat. The service information included in
this manual is intended to provide you, the owner,
with the necessary information for completing your
own preventive maintenance and minor repairs.
The tools provided in the owner’s tool kit are suffi-
cient for this purpose, except that a torque wrench
is also necessary to properly tighten nuts and
bolts.NOTE:_ If you do not have a torque wrench available dur-
ing a service operation requiring one, take your
machine to a Yamaha dealer to check the torque
settings and adjust them as necessary. _
U5NF62.book Page 3 Wednesday, May 8, 2002 1:40 PM

8-19 1. Oil filter cover 2. Bolt (× 3)
3. Oil filter element 4. O-ring
1. Couvercle du filtre à huile 2. Boulon (× 3)
3.Élément du filtre à huile 4. Joint torique
1. Tapa del filtro de aceite 2. Perno (× 3)
3. Filtro de aceite 4. Junta tórica
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.
9. Install the oil filter cover by installing the bolts.
10. Install the oil strainer, compression spring, O-
ring and drain bolt. Tighten the drain bolt and
oil filter cover bolts to the specified torques.CAUTION:_ Before installing the drain bolt, be sure to in-
stall the O-ring, compression spring and oil
strainer. _
U5NF62.book Page 19 Wednesday, May 8, 2002 1:40 PM

8-21
11. Add the specified amount of the recommend-
ed engine oil, and then install the engine oil
filler cap. Tightening torques:
Drain bolt:
32 Nm (3.2 m·kgf)
Filter cover bolt:
10 Nm (1.0 m·kgf)
Recommended oil:
See page 10-2.
Oil quantity:
Periodic oil change:
2.4 L
With oil filter replacement:
2.5 L
Total amount:
3.2 L
U5NF62.book Page 21 Wednesday, May 8, 2002 1:40 PM

8-27 a. Spark plug gap
a.Écartement des électrodes
a. Separación entre electrodos de la bujía
Before installing the spark plug, measure the elec-
trode gap with a wire thickness gauge and adjust it
to specification.
When installing the spark plug, always clean the
gasket surface and its mating surface. Wipe off
any grime from the threads and tighten it to the
specified torque.Spark plug gap:
0.6–0.7 mm
Tightening torque:
Spark plug:
17.5 Nm (1.75 m·kgf)
U5NF62.book Page 27 Wednesday, May 8, 2002 1:40 PM

8-55 1. Locknut 2. Adjusting bolt
1. Contre-écrou 2. Boulon de réglage
1. Contratuerca 2. Perno de ajuste
1. Locknut 2. Adjusting bolt
1. Contre-écrou 2. Boulon de réglage
1. Contratuerca 2. Perno de ajuste
4. Tighten the locknut at the clutch lever.
5. Screw in the adjusting bolt at the rear brake
caliper by hand until it feels tight, then screw it
out 1/8 turn. Tighten the locknut to the speci-
fied torque.CAUTION:_ When tightening the locknut, hold the adjust-
ing bolt with a wrench so that the adjusting
bolt does not turn together with the locknut. _
WARNING
_ Operating with improperly adjusted brakes
could cause the brakes to malfunction, result-
ing in reduced braking performance. This
could increase the chance of a collision or ac-
cident. After adjusting the parking brake, block
the rear of the machine off the ground and spin
the rear wheels. Check to make sure there is
no brake drag. If brake drag is noticed, perform
the adjustment again. _
Tightening torque:
Locknut:
16 Nm (1.6 m·kgf)
U5NF62.book Page 55 Wednesday, May 8, 2002 1:40 PM

8-63 1. Upper wheel hub nut 2. Lower wheel hub nut
1.Écrou supérieur de moyeu de roue
2.Écrou inférieur de moyeu de roue
1. Tuerca superior del cubo de la rueda
2. Tuerca inferior del cubo de la rueda
1. Locknut 2. Adjusting bolt 3. Alignment marks
1. Contre-écrou 2. Boulon de réglage
3. Repères d’alignement
1. Contratuerca 2. Perno de ajuste
3. Marcas de alineación
EBU01194
Drive chain slack adjustment
1. Loosen the rear wheel hub upper and lower
nuts.
2. Loosen the locknuts on each side of the swin-
garm. To tighten the drive chain, turn the ad-
justing bolts in direction
a. To loosen the
drive chain, turn the adjusting bolts in direc-
tion
b and push the wheels forward. Turn
each adjusting bolt exactly the same amount
to maintain correct axle alignment.NOTE:_ There are alignment marks on each side of the
swingarm and on the hub. Use them to check for
proper wheel axle alignment. _3. After adjusting, tighten the locknuts and the
wheel hub nuts to the specified torques.
Tightening torques:
Locknut:
16 Nm (1.6 m·kgf)
Upper wheel hub nut:
120 Nm (12.0 m·kgf)
Lower wheel hub nut:
60 Nm (6.0 m·kgf)
U5NF62.book Page 63 Wednesday, May 8, 2002 1:40 PM

8-75 1. Arrow mark
1. Flèche
1. Flecha
EBU00739
Wheel installation
When installing the wheel, reverse the removal
procedure.NOTE:_ The arrow mark
on the tire must point toward
the rotating direction of the wheel.
_Tighten the wheel nuts to the specified torque.
Wheel nut torque:
Front: 45 Nm (4.5 m·kgf)
Rear: 45 Nm (4.5 m·kgf)
U5NF62.book Page 75 Wednesday, May 8, 2002 1:40 PM