Checking The Engine Idling Speed; Synchronizing The Throttle Bodies; Checking The Throttle Body Synchronization - Yamaha R1 Series 2015 Service Manual

• Align the camshaft sprocket marks with the cyl-
inder head surface.
• If the camshaft cap bolt is a new one, it is not
necessary to apply engine oil onto the mating
surface and threads of the bolt.
• If the camshaft cap bolt is a new one, tighten it
to 10 Nm (1.0 m·kgf, 7.2 ft·lbf).
• 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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7. 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
Engine idling speed
1200–1400 r/min
3. Check:
• ISC (Idle Speed Control) learning value
"00" or "01" Check the intake system.
"02" Clean the throttle bodies.
Refer to "CHECKING AND CLEANING THE
THROTTLE BODIES" 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 (ECU)" on
page 9-5.
b. Check the ISC (Idle Speed Control) leaning
value.
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Go to next step.
PERIODIC MAINTENANCE
EAS30797

SYNCHRONIZING THE THROTTLE BODIES

TIP
Before synchronizing the throttle bodies, check
the following items:
• Valve clearance
• Spark plugs
• Air filter element
• Throttle body joints
• Fuel hose
• Exhaust system
• Breather hoses

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.
• Fuel tank cover
Refer to "GENERAL CHASSIS (2)" on page
4-7.
• Fuel tank
Refer to "FUEL TANK" on page 7-1.
• Air filter case
Refer to "AIR FILTER CASE" on page 7-4.
3. Remove:
• Caps "1"
4. Install:
• Vacuum gauge "1"
Vacuum gauge
90890-03094
Vacuummate
YU-44456
3-9
1