2006 YAMAHA YFZ450 torque

8-41
cC
Be sure to apply LOCTITEto the engine
guard bolts before installing them.
Tightening torque:
Engine guard bolt:
7 Nm (0.7 m0kgf)
5TG-9-62 8 5/13/05 1:48 PM Page 8-41

8-49
5. Remove the coolant reservoir by removing
the bolts.
6. Remove the coolant reservoir cap, and
then turn the coolant reservoir upside
down to empty it.
7. After draining the coolant, thoroughly flush
the cooling system with clean tap water.
8. Install the coolant reservoir by installing the
bolts.
9. Replace the coolant drain bolt washer if it
is damaged, and then tighten the coolant
drain bolt to the specified torque.
10. Pour the recommended coolant into the
radiator until it is full.
11. Pour the recommended coolant into the
coolant reservoir to the maximum level
mark.
1. Coolant reservoir cap
2. Coolant reservoir 3. Bolt (×2)
1. Bouchon de vase d’expansion
2. Vase d’expansion 3. Boulon (×2)1. Tapa del depósito de refrigerante
2. Depósito de refrigerante 3. Perno (×2)
Tightening torque:
Coolant drain bolt:
10 Nm (1.0 m0kgf)
5TG-9-62 8 5/13/05 1:48 PM Page 8-49

8-61
Installation
1. Measure the electrode gap with a wire
thickness gauge and, if necessary, adjust
the gap to specification.
2. Clean the surface of the spark plug gasket
and its mating surface, and then wipe off
any grime from the spark plug threads.
3. Install the spark plug and tighten it to the
specified torque.
a
a. Spark plug gapa. Écartement des électrodesa. Separación entre electrodos de la bujía
Specified spark plug:
CR8E (NGK)
Spark plug gap:
0.7–0.8 mm
Tightening torque:
Spark plug:
12.5 Nm (1.25 m0kgf)
5TG-9-62 8 5/13/05 1:48 PM Page 8-61

8-63
NOTE:
If a torque wrench is not available when you are
installing a spark plug, a good estimate of the
correct torque is 1/4 to 1/2 turn past finger tight.
Have the spark plug tightened to the specified
torque as soon as possible.
4. Install the spark plug cap.
cC
Do not use any tools to remove or install the
spark plug cap, otherwise the ignition coil
coupler may be damaged. The spark plug
cap may be difficult to remove because the
rubber seal on the end of the cap fits tightly.
To remove the spark plug cap, simply twist it
back and forth while pulling it out; to install
it, twist it back and forth while pushing it in.
5. Place the fuel tank in the original position,
and then install the bolt.
6. Remove the fuel tank cap by turning it
counterclockwise.
5TG-9-62 8 5/13/05 1:48 PM Page 8-63

8-99
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 lock-
nut to the specified torque.
cC
When tightening the locknut, hold the adjust-
ing bolt with a wrench so that the adjusting
bolt does not turn together with the locknut.
w
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
accident. 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 m0kgf)
5TG-9-62 9-11 5/12/05 6:14 PM Page 8-99

8-109
5. Tighten the rear axle pinch bolts in the
order shown to the specified torque.
3
124
Tightening torque:
Rear axle pinch bolt:
21 Nm (2.1 m0kgf)
5TG-9-62 9-11 5/12/05 6:14 PM Page 8-109

8-127
EBU07390
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.1. Arrow mark1. Flèche1. Flecha
Wheel nut torque:
Front: 45 Nm (4.5 m0kgf)
Rear: 45 Nm (4.5 m0kgf)
5TG-9-62 9-11 5/12/05 6:14 PM Page 8-127

All specification data in this manual are listed in SI
and METRIC UNITS.
Use this table to convert METRIC unit values to
IMPERIAL unit values.
Example:
METRIC
VALUECONVERSION
FACTORIMPERIAL
VALUE
2 mm× 0.03937 = 0.08 in
Conversion table
METRIC SYSTEM TO IMPERIAL SYSTEM
Metric unitConversion
factorImperial unit
Torquem·kgf
m·kgf
cm·kgf
cm·kgf
× 7.233× 86.794× 0.0723× 0.8679ft·lbf
in·lbf
ft·lbf
in·lbf
Weightkg
g× 2.205× 0.03527lb
oz
Speed km/h× 0.6214 mi/h
Distancekm
m
m
cm
mm× 0.6214× 3.281× 1.094× 0.3937× 0.03937mi
ft
yd
in
in
Volume,
Capacitycc (cm3)
cc (cm3)
L (liter)
L (liter)× 0.03527× 0.06102× 0.8799× 0.2199oz (IMP liq.)
cu·in
qt (IMP liq.)
gal (IMP liq.)
Miscellaneouskg/mm
kgf/cm
2
°C
× 55.997× 14.2234× 1.8 + 32 lb/in
psi (lbf/in
2)
°F
EBU01070Conversion table
11-1
5TG-9-62 9-11 5/12/05 6:14 PM Page 10-19