PERIODIC MAINTENANCE
3-8
g. Install the exhaust and intake camshafts, tim-
ing chain and camshaft caps.
TIP
• Refer to “CAMSHAFTS” on page 5-11.
• Lubricate the camshaft lobes and camshaft
journals with molybdenum disulfide oil.
• First, install the exhaust camshaft.
• Align the camshafts sprocket marks with the
cylinder head edge.
• Turn the crankshaft counterclockwise several
full turns to seat the parts.
h. Measure the valve clearance again.
i. If the valve clearance is still out of specifica-
tion, repeat all of the valve clearance adjust-
ment steps until the specified clearance is
obtained.
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8. Install:
• All removed parts
TIP
For installation, reverse the removal procedure.
EAS31017
CHECKING THE ENGINE IDLING SPEED
TIP
Prior to checking the engine idling speed, the
throttle body synchronization should be adjusted
properly, the air filter element should be clean,
and the engine should have adequate compres-
sion.
1. Start the engine and let it warm up for several
minutes.
2. Check:
• Engine idling speed
Out of specification
→
Go to next step.
3. Check:
• ISC (idle speed control) learning value
“00” or “01”
→
Check the intake system.
“02”
→
Clean the ISC (idle speed control)
valve.
Refer to “CHECKING THE THROTTLE
BODIES AND ISC (IDLE SPEED CON-
TROL) VALVE” on page 7-8.
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a. Connect the Yamaha diagnostic tool.
Use the diagnostic code number “67”.
Refer to “SELF-DIAGNOSTIC FUNCTION
AND DIAGNOSTIC CODE TABLE” on page
9-5.
b. Check the ISC (idle speed control) leaning
value.
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EAS30797
SYNCHRONIZING THE THROTTLE BODIES
TIP
Before synchronizing the throttle bodies, check
the following items:
• Valve clearance
• Spark plugs
• Air filter element
• Throttle body joint
• Fuel hose
• Exhaust system
• Crankcase breather hose
Checking the throttle body synchronization
1. Stand the vehicle on a level surface.
TIP
Place the vehicle on a suitable stand.
2. Remove:
• Rider seat
Refer to “GENERAL CHASSIS (1)” on page
4-1.
• Side panels
Refer to “GENERAL CHASSIS (2)” on page
4-3.
• Fuel tank cover assembly
Refer to “GENERAL CHASSIS (3)” on page
4-5.
T
R
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.
Camshaft cap bolt
10 Nm (1.0 m·kgf, 7.2 ft·lbf)
2
1
Engine idling speed
1300–1500 r/min
Yamaha diagnostic tool
90890-03231
Summary of Contents for YZF-R25
Page 1: ......
Page 2: ......
Page 3: ......
Page 6: ......
Page 8: ......
Page 25: ...BASIC SERVICE INFORMATION 1 16 ...
Page 32: ...SPECIAL TOOLS 1 23 ...
Page 49: ...TIGHTENING TORQUES 2 16 2 6 8 5 4 1 2 6 3 7 2 10 9 A ...
Page 66: ...COOLING SYSTEM DIAGRAMS 2 33 EAS20020 COOLING SYSTEM DIAGRAMS 1 2 3 1 5 4 4 ...
Page 99: ......
Page 128: ...PERIODIC MAINTENANCE 3 29 ...
Page 146: ...GENERAL CHASSIS 5 4 15 1 b b a a 2 ...
Page 200: ...FRONT FORK 4 69 2 b a 1 ...
Page 209: ...SWINGARM AND REAR SHOCK ABSORBER ASSEMBLY 4 78 2 1 1 1 a A B ...
Page 214: ...CHAIN DRIVE 4 83 ...
Page 256: ...CYLINDER AND PISTONS 5 39 1 ...
Page 310: ...TRANSMISSION 5 93 ...
Page 322: ...WATER PUMP 6 11 ...
Page 336: ...THROTTLE BODIES 7 13 c 1 cylinder d 2 cylinder A Left B Right b a d c A B b 1 ...
Page 337: ...THROTTLE BODIES 7 14 ...
Page 338: ...AIR INDUCTION SYSTEM 7 15 EAS20071 AIR INDUCTION SYSTEM 1 2 3 4 5 1 2 ...
Page 342: ...AIR INDUCTION SYSTEM 7 19 ...
Page 345: ......
Page 355: ...ELECTRIC STARTING SYSTEM 8 10 ...
Page 359: ...CHARGING SYSTEM 8 14 ...
Page 371: ...SIGNALING SYSTEM 8 26 ...
Page 417: ...FUEL PUMP SYSTEM 8 72 ...
Page 420: ...ELECTRICAL COMPONENTS 8 75 2 3 4 5 12 11 10 9 8 7 1 6 ...
Page 440: ...ELECTRICAL COMPONENTS 8 95 ...
Page 451: ...SELF DIAGNOSTIC FUNCTION AND DIAGNOSTIC CODE TABLE 9 10 ...
Page 453: ......
Page 454: ......