REAR BRAKE
4-29
WARNING
• Use only the designated brake fluid. Other
brake fluids may cause the rubber seals to
deteriorate, causing leakage and poor
brake performance.
• Refill with the same type of brake fluid that
is already in the system. Mixing brake flu-
ids may result in a harmful chemical reac-
tion, leading to poor brake performance.
• When refilling, be careful that water does
not enter the brake fluid reservoir. Water
will significantly lower the boiling point of
the brake fluid and could cause vapor
lock.
ECA13540
NOTICE
Brake fluid may damage painted surfaces
and plastic parts. Therefore, always clean
up any spilt brake fluid immediately.
5. Bleed:
• Brake system
Refer to “BLEEDING THE BRAKE SYS-
TEM” on page 3-21.
6. Check:
• Brake fluid level
The minimum level mark “a” or below
Add.
Refer to “CHECKING THE BRAKE FLUID
LEVEL” on page 3-26.
7. Check:
• Brake pedal operation
A softy or spongy feeling
Bleed the brake
system.
Refer to “BLEEDING THE BRAKE SYS-
TEM” on page 3-21.
EAS1SL5159
REMOVING THE REAR BRAKE MASTER
CYLINDER
TIP
Before removing the rear brake master cylin-
der, drain the brake fluid from the entire brake
system.
1. Remove:
• Union bolt
• Copper washers
• Brake hose
TIP
To drain any remaining brake fluid, place a con-
tainer under the master cylinder and the end of
the brake hose.
EAS1SL5160
CHECKING THE REAR BRAKE MASTER
CYLINDER
1. Check:
• Brake master cylinder “1”
Damage/scratches/wear
Replace.
• Brake fluid delivery passages “2”
(brake master cylinder body)
Obstruction
Blow out with compressed
air.
2. Check:
• Brake master cylinder kit
Damage/wear
Replace.
3. Check:
• Master cylinder reservoir cap
Crack/damage
Replace.
• Brake master cylinder reservoir diaphragm
holder
• Brake master cylinder reservoir diaphragm
Crack/damage
Replace.
4. Check:
• Brake hoses
Cracks/damage/wear
Replace.
a
1
2
Summary of Contents for YZ450FF 1SL-28199-11
Page 6: ...EAS1SL5006 YAMAHA MOTOR CORPORATION U S A YZ MOTORCYCLE LIMITED WARRANTY...
Page 10: ......
Page 38: ...CLEANING AND STORAGE 1 26...
Page 66: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 27...
Page 68: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 29...
Page 70: ...LUBRICATION SYSTEM CHART AND DIAGRAMS 2 31...
Page 72: ...CABLE ROUTING DIAGRAM 2 33 EAS1SL5066 CABLE ROUTING DIAGRAM...
Page 74: ...CABLE ROUTING DIAGRAM 2 35...
Page 76: ...CABLE ROUTING DIAGRAM 2 37...
Page 78: ...CABLE ROUTING DIAGRAM 2 39...
Page 80: ...CABLE ROUTING DIAGRAM 2 41...
Page 82: ...CABLE ROUTING DIAGRAM 2 43...
Page 122: ...ELECTRICAL SYSTEM 3 38...
Page 135: ...REAR WHEEL 4 11 1 2...
Page 192: ...CHAIN DRIVE 4 68...
Page 278: ...WATER PUMP 6 7...
Page 290: ......
Page 297: ...CHARGING SYSTEM 8 7 2 AC magneto 3 Rectifier regulator 4 Joint connector 5 Condenser...
Page 299: ...CHARGING SYSTEM 8 9...
Page 325: ...FUEL PUMP SYSTEM 8 35...
Page 326: ...ELECTRICAL COMPONENTS 8 36 EAS1SL5334 ELECTRICAL COMPONENTS EAS1SL5335 9 10 1 2 3 4 5 6 7 8...
Page 328: ...ELECTRICAL COMPONENTS 8 38 EAS1SL5336 CHECKING THE SWITCHES B Y P Sb 2 1...
Page 329: ...ELECTRICAL COMPONENTS 8 39 1 Engine stop switch 2 Neutral switch...
Page 344: ...LIST OF SELF DIAGNOSTIC AND FAIL SAFE ACTIONS 9 7...