2003 YAMAHA BIG BEAR PRO 400 oil level

8-23 1. Bolt (× 3)
1. Boulon (× 3)
1. Perno (× 3)
1. Oil filler bolt
1. Boulon de l’orifice de remplissage
1. Perno del orificio de llenado
EBU00462
Transfer gear oil replacementNOTE:When replacing the transfer gear oil, replace the
engine oil also.1. Remove the transfer gear case guard.
2. Place the machine on a level place.
3. Place a container under the transfer gear
case.
4. Remove the oil filler bolt and drain bolt to
drain the oil.
5. Install the drain bolt and tighten to specifica-
tion.
Tightening torque:
Drain bolt (transfer gear case):
20 Nm (2.0 m·kgf)
U4SH6A.book Page 23 Thursday, May 30, 2002 1:25 PM

8-27 1. Final gear oil 2. Correct oil level
3. Filler bolt
1. Huile de transmission finale 2. Niveau d’huile correct
3. Boulon de l’orifice de remplissage
1. Aceite de la transmisión final 2. Nivel de aceite correcto
3. Perno de llenado
1. Bolt (× 3)
1. Boulon (× 3)
1. Perno (× 3)
EBU00825
Final gear oil
Final gear oil measurement
1. Place the machine on a level place.
2. Remove the oil filler bolt and check the oil lev-
el. It should be up to the brim of the hole. If
the level is low, add oil to raise it to the proper
level.CAUTION:_ Be sure no foreign material enters the final
gear case. _3. Install the oil filler bolt and tighten it to the
specified torque.
Final gear oil replacement
1. Remove the final gear case cover.
2. Place the machine on a level place.
3. Place a container under the final gear case to
collect the used oil. Tightening torque:
Oil filler bolt:
23 Nm (2.3 m·kgf)
U4SH6A.book Page 27 Thursday, May 30, 2002 1:25 PM

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)
U4SH6A.book Page 31 Thursday, May 30, 2002 1:25 PM

8-59
3. Refill with the same type of brake fluid. Mixing
fluids may result in a harmful chemical reac-
tion and lead to poor brake performance.
4. Be careful that water does not enter the mas-
ter cylinder when refilling. Water will signifi-
cantly lower the boiling point of the fluid and
may result in vapor lock.
5. Brake fluid may deteriorate painted surfaces
or plastic parts. Always clean up spilled fluid
immediately.
6. Have a Yamaha dealer check the cause if the
brake fluid level goes down. Recommended brake fluid: DOT 4
U4SH6A.book Page 59 Thursday, May 30, 2002 1:25 PM

10-2
10
Noise and vibration level:
Noise level (77/311/EEC) 87.1 dB (A)
Vibration on seat (EN1032, ISO5008) Not exceed 0.5 m/s
2
Vibration on handlebar (EN1032, ISO5008) Not exceed 2.5 m/s
2
Engine oil/Transfer gear oil:
Type
Recommended engine oil classification: API Service SE, SF, SG type or higherModel YFM400FP/YFM400FW
-20˚-10˚0˚
10˚20˚30˚40˚50˚C
10W/30
15W/4020W/4020W/50
10W/40
5W/30
CAUTION:
In order to prevent clutch slippage (since the en-
gine oil also lubricates the clutch), do not mix any
chemical additives. Do not use oils with a diesel
specification of “CD” or oils of a higher quality
than specified. In addition, do not use oils labeled
“ENERGY CONSERVING II” or higher.
U4SH6A.book Page 2 Thursday, May 30, 2002 1:25 PM