Checking The Engine Idling Speed; Synchronizing The Throttle Bodies - Yamaha YZF-R1 Series Service Manual

Camshaft cap bolt
8 N·m (0.8 kgf·m, 5.9 lb·ft)
Camshaft cap bolt (new)
10 N·m (1.0 kgf·m, 7.4 lb·ft)
TIP
• Refer to "CAMSHAFTS" on page 5-18.
• Lubricate the camshaft lobes and camshaft
journals.
• First, install the exhaust camshaft.
• 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 N·m (1.0 kgf·m, 7.4 lb·ft).
• 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 specifi-
cation, repeat all of the valve clearance
adjustment steps until the specified clear-
ance is obtained.
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 → Go to next step.
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.
PERIODIC MAINTENANCE
Refer to "CHECKING AND CLEANING THE
THROTTLE BODIES" on page 7-15.
a. Connect the Yamaha diagnostic tool.
Use the diagnostic code number "67".
Refer to "SELF-DIAGNOSTIC FUNC-
TION AND DIAGNOSTIC CODE TABLE"
on page 9-32.
b. Check the ISC (Idle Speed Control) lean-
ing value.
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 maintenance stand.
2. Remove:
• Rider seat
Refer to "GENERAL CHASSIS (1)" on page
4-1.
• Fuel tank
Refer to "FUEL TANK" on page 7-1.
• Air filter case
Refer to "AIR FILTER CASE" on page 7-5.
3. Remove:
• Caps "1"
• Service hose cap "2"
1 1
4. Install:
• Vacuum gauge "1"
3-9
1 1
2 2