Yamaha Yzf R1 2007 Manual

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...

ENGINE
3-19
EAS21120
CHECKING THE COOLING SYSTEM
1. Remove:
 Lower cowlings
 Side cowling
Refer to GENERAL CHASSIS on page 4-
1.
2. Check:
 Radiator “1”
 Radiator inlet hose “2”
 Radiator outlet hose “3”
Oil cooler “4”
 Oil cooler inlet hose “5”
 Oil cooler outlet hose “6”
 Water jacket joint “7”
 Water jacket joint inlet hose “8”
 Water pump inlet pipe “9” 
 Water pump outlet pipe “10”
Cracks/damage → Replace.
Refer to RADIATOR on page 6-1 and 
OIL COOLER on page 6-4.
3. Install: Side...

ENGINE
3-20
7. Drain:
 Coolant
(from the engine and radiator)
8. Check:
 Copper washer “1”   (coolant drain 
bolt “2”)
9. Install:
 Coolant drain bolt (with the copper washer)
10. Connect:
 Coolant reservoir hose
11. Install:
 Coolant reservoir
12. Fill:
 Cooling system
(with the specified amount of the recom-
mended coolant)Handling notes for coolant
Coolant is potentially harmful and should 
be handled with special care.
WARNING
EWA13040
 If coolant splashes in your eyes, thor-
oughly wash them...

ENGINE
3-21
15. Install:
 Coolant reservoir cap
16. Start the engine, warm it up for several 
minutes, and then stop it.
17. Check:
 Coolant level
Refer to CHECKING THE COOLANT 
LEVEL on page 3-18.
NOTE:
Before checking the coolant level, wait a few 
minutes until the coolant has settled.
18. Install:
 Side cowlings
 Lower cowlings
Refer to GENERAL CHASSIS on page 4-
1. 

CHASSIS
3-22
EAS21140
CHASSIS
EAS21160
ADJUSTING THE FRONT DISC BRAKE
1. Adjust:
 Brake lever position
(distance “a” from the throttle grip to the 
brake lever)
NOTE:
While pushing the brake lever forward, turn the 
adjusting dial “1” until the brake lever is in the 
desired position.
WARNING
EWA13060
 After adjusting the brake lever position, 
make sure the pin on the brake lever 
holder is firmly inserted in the hole in the 
adjusting dial.
 A soft or spongy feeling in the brake lever 
can indicate...

CHASSIS
3-23
WARNING
EWA13050
A soft or spongy feeling in the brake lever 
can indicate the presence of air in the brake 
system. Before the vehicle is operated, the 
air must be removed by bleeding the brake 
system. Air in the brake system will consid-
erably reduce braking performance.
CAUTION:
ECA13510
After adjusting the brake pedal position, 
make sure there is no brake drag.
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3. Adjust:
 Rear brake light switch
Refer to ADJUSTING THE REAR BRAKE 
LIGHT SWITCH on page...

CHASSIS
3-24
EAS21260
CHECKING THE REAR BRAKE PADS
The following procedure applies to all of the 
brake pads.
1. Operate the brake.
2. Check:
 Rear brake pad
Wear indicators “a” almost touch the brake 
disc → Replace the brake pads as a set.
Refer to REAR BRAKE on page 4-33.
EAS21280
CHECKING THE FRONT BRAKE HOSES
The following procedure applies to all of the 
brake hoses and brake hose clamps.
1. Check:
 Brake hose “1”
Cracks/damage/wear → Replace.
2. Check:
 Brake hose clamp “2”
Loose → Tighten the...

CHASSIS
3-25
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a. Hold the main body “1” of the rear brake 
light switch so that it does not rotate and 
turn the adjusting nut “2” in direction “a” or 
“b” until the rear brake light comes on at the 
proper time.
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EAS21360
BLEEDING THE HYDRAULIC BRAKE SYS-
TEM
WARNING
EWA13100
Bleed the hydraulic brake system when-
ever:
 The system is disassembled.
 A brake hose is loosened, disconnected 
or replaced.
 The brake fluid level is very low.
...

CHASSIS
3-26
g. Loosen the bleed screw.
NOTE:
Loosening the bleed screw will release the 
pressure and cause the brake lever to contact 
the throttle grip or the brake pedal to fully 
extend.
h. Tighten the bleed screw and then release 
the brake lever or brake pedal.
i. Repeat steps (e) to (h) until all of the air 
bubbles have disappeared from the brake 
fluid in the plastic hose.
j. Tighten the bleed screw to specification.
k. Fill the brake fluid reservoir to the proper 
level with the recommended...

CHASSIS
3-27
NOTE:
To maintain the proper wheel alignment, adjust 
both sides evenly.
d. Tighten both locknuts to specification.
e. Tighten the wheel axle nut to specification.
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EAS21440
LUBRICATING THE DRIVE CHAIN
The drive chain consists of many interacting 
parts. If the drive chain is not maintained prop-
erly, it will wear out quickly. Therefore, the drive 
chain should be serviced, especially when the 
vehicle is used in dusty areas.
This vehicle has a drive chain with...