PERIODIC MAINTENANCE
3-8
g. Install the exhaust and intake camshafts, tim-
ing chain and camshaft caps.
• Refer to “CAMSHAFTS” on page 5-13.
• 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
For installation, reverse the removal procedure.
EAS31017
CHECKING THE ENGINE IDLING SPEED
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 “CLEANING THE ISC (IDLE SPEED
CONTROL) VALVE” on page 7-12.
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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
Before synchronizing the throttle bodies, check
the following items:
• Valve clearance
• Spark plugs
• Air filter element
• Throttle body joints
• Fuel hose
• Exhaust system
• Cylinder head breather hose
• Vacuum hoses
Checking the throttle body synchronization
1. Stand the vehicle on a level surface.
Place the vehicle on a suitable stand.
2. Remove:
• Rider seat
Refer to “GENERAL CHASSIS (1)” on page
4-1.
• Fuel tank top cover
• Fuel tank cover (left)
• Fuel tank cover (right)
• Fuel tank center cover
• Fuel tank front cover
Refer to “GENERAL CHASSIS (4)” on page
4-11.
Exhaust camshaft cap bolt
10 Nm (1.0 m·kgf, 7.2 ft·lbf)
Intake camshaft cap bolt
10 Nm (1.0 m·kgf, 7.2 ft·lbf)
Engine idling speed
1100–1300 r/min
Yamaha diagnostic tool
90890-03231
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