2003 YAMAHA BIG BEAR PRO 400 torque

8-31 1. Filler bolt
1. Boulon de l’orifice de remplissage
1. Perno de llenado
7. Install the filler bolt and tighten to the speci-
fied torque.
8. Check for oil leakage. If oil leakage is found,
check for the cause.
9. Install the final gear case cover.
EBU00826
Differential gear oil replacement
1. Place the machine on a level place.
2. Place a container under the differential gear
case to collect the used oil.
3. Remove the filler bolt and drain bolts to drain
the oil. Tightening torque:
Filler bolt (final gear case):
23 Nm (2.3 m·kgf)
EE.book Page 31 Monday, June 18, 2001 10:18 AM

8-33 a. Front drain bolt
b. Rear drain bolt
a. Boulon de vidange avant
b Boulon de vidange arrière
a. Perno de drenaje frontal
b. Perno de drenaje trasero
4. Install the drain bolts and tighten to specifica-
tion.
5. Fill the differential gear case with oil.CAUTION:_ Be sure no foreign material enters the differen-
tial gear case. _
Tightening torque:
Drain bolt (differential gear case):
a 23 Nm (2.3 m·kgf)
b 16 Nm (1.6 m·kgf)
Recommended oil:
See page 10-3.
Oil quantity:
Periodic oil change:
0.47 L
Total amount:
0.5 L
EE.book Page 33 Monday, June 18, 2001 10:18 AM

8-35 1. Boot (× 2)
1. Soufflet (× 2)
1. Guardapolvo (× 2)
1. Boot (× 2)
1. Soufflet (× 2)
1. Guardapolvo (× 2)
6. Install the filler bolt and tighten it to specifica-
tion.
7. Check for oil leakage. If oil leakage is found,
check for the cause.
EBU00862
Axle boots
Check the protective boots for holes or tears. If any
damage is found, have them replaced by a
Yamaha dealer.Tightening torque:
Filler bolt (differential gear case):
23 Nm (2.3 m·kgf)
EE.book Page 35 Monday, June 18, 2001 10:18 AM

8-39 a. Spark plug gap
a.Écartement des électrodes
a. Huelgo de la bujía
Installation
1. Measure the electrode gap with a wire thick-
ness gauge and, if necessary, adjust the gap
to specification.
2. Clean the gasket surface. Wipe off any grime
from the threads.
3. Install the spark plug 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)
EE.book Page 39 Monday, June 18, 2001 10:18 AM

8-41
NOTE:If a torque wrench is not available when you are in-
stalling 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.
EE.book Page 41 Monday, June 18, 2001 10:18 AM

8-77 1. Locknut 2. Adjusting bolt
1. Contre-écrou 2. Boulon de réglage
1. Contratuerca 2. Perno de ajuste
EBU00346
Clutch adjustment
1. Loosen the locknut.
2. Slowly turn the adjusting bolt counterclock-
wise until resistance is felt. Then, turn it 1/8
turn clockwise.
3. Tighten the locknut to specification.NOTE:Turn the adjusting bolt counterclockwise to de-
crease the clutch free play and turn it clockwise to
increase the free play.
Tightening torque:
15 Nm (1.5 m·kgf)
EE.book Page 77 Monday, June 18, 2001 10:18 AM

8-83 1. Tapered nut
1.Écrou conique
1. Tuerca cónica
1. Tapered wheel nuts are used for both front
and rear wheels. Install the nut with its ta-
pered side towards the wheel.
2. Tighten the wheel nuts to the specified
torque.
EBU00381
Battery
This machine is equipped with a sealed-type bat-
tery. Therefore it is not necessary to check the
electrolyte or add distilled water in the battery. If
the battery seems to have discharged, consult a
Yamaha dealer.CAUTION:
Do not try to remove the sealing caps of the
battery cells. You may damage the battery.Wheel nut torque:
Front: 55 Nm (5.5 m·kgf)
Rear: 55 Nm (5.5 m·kgf)
EE.book Page 83 Monday, June 18, 2001 10:18 AM

11-1
EBU00429
HOW TO USE THE CONVERSION TABLE
All specification data in this manual are listed in SI
and METRIC UNITS.
Use this table to convert METRIC unit data to IM-
PERIAL unit data.
Ex.
CONVERSION TABLE
METRIC MULTIPLIER IMPERIAL
**mm
×
0.03937 = **in
2 mm
×
0.03937 = 0.08 in
METRIC TO IMPERIAL
Metric unit Multiplier Imperial unit
Torquem·kg
m·kg
cm·kg
cm·kg7.233
86.794
0.0723
0.8679ft·lb
in·lb
ft·lb
in·lb
Weightkg
g2.205
0.03527lb
oz
Speed km/hr 0.6214 mph
Distancekm
m
m
cm
mm0.6214
3.281
1.094
0.3937
0.03937mi
ft
yd
in
in
Volume /
Capacitycc (cm3)
cc (cm3)
lt (liter)
lt (liter)0.03527
0.06102
0.8799
0.2199oz (IMP liq.)
cu·in
qt (IMP liq.)
gal (IMP liq.)
Misc.kg/mm
kg/cm2
Centigrade
(°
C)55.997
14.2234
9/5 + 32 lb/in
psi (lb/in
2)
Fahrenheit (°
F)
EE.book Page 1 Monday, June 18, 2001 10:18 AM