Yamaha YZFR1W 2007, Service Manual

Page: 101 / 429

ENGINE
3-18
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6. Install:
• EXUP valve pulley cover
7. Install:
• Lower cowlings
Refer to "GENERAL CHASSIS" on page 4-
1.
EAS28360
CHECKING THE EXUP SERVO MOTOR
1. Check:
• EXUP servo motor operation
Out of specification
→
Replace.
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a. Check whether or not the EXUP valve is
seized.
• Disconnect the EXUP cable and check that
the EXUP valve is moved smoothly by
hand.
• When the valve is not moved smoothly,
repair or replace it.
Refer to "ADJUSTING THE EXUP
CABLES" on page 3-17.
b. When the EXUP valve is moved smoothly,
replace the EXUP servo motor.
c. Perform the self-diagnosis mode and check
the operation of EXUP valve by visual
inspection (Code No: 53).
The operation should be carried out as 3-
second drive in the full open direction, 2-
second stop and 3-second drive in the full
close direction.
d. Check that the EXUP servo motor pulley
rotates several times.
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EAS21110
CHECKING THE COOLANT LEVEL
1. Stand the vehicle on a level surface.
NOTE:
• Place the vehicle on a suitable stand.
• Make sure the vehicle is upright.
2. Remove:
• Lower cowlings
• Right side cowling
Refer to "GENERAL CHASSIS" on page 4-
1.
3. Check:
• Coolant level
The coolant level should be between the
maximum level mark “a” and minimum level
mark “b”.
Below the minimum level mark
→
Add the
recommended coolant to the proper level.
CAUTION:
ECA13470
• Adding water instead of coolant lowers
the antifreeze content of the coolant. If
water is used instead of coolant check,
and if necessary, correct the antifreeze
concentration of the coolant.
• Use only distilled water. However, if dis-
tilled water is not available, soft water
may be used.
4. Start the engine, warm it up for several
minutes, and then turn it off.
5. Check:
• Coolant level
NOTE:
Before checking the coolant level, wait a few
minutes until it settles.
6. Install:
• Right side cowling
• Lower cowlings
Refer to "GENERAL CHASSIS" on page 4-
1.
EXUP valve pulley cover bolt
10 Nm (1.0 m·kg, 7.2 ft·lb)