Synchronizing The Throttle Bodies - Yamaha YZF-R1B 2012 Service Manual

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Valve pad range
Valve pad thickness
Available valve pads
Example:
Valve pad number = 158
Rounded value = 160
New valve pad number = 160
f. Install the new valve pad "1" and the valve
lifter "2".
TIP
• Lubricate the valve pad with molybdenum
disulfide oil.
• Lubricate the valve lifter with engine oil.
• The valve lifter must turn smoothly when
rotated by finger.
• Install the valve lifter and the valve pad in the
correct place.
g. Install the exhaust and intake camshafts,
timing chain and camshaft caps.
Camshaft cap bolt
10 Nm (1.0 m·kgf, 7.2 ft·lbf)
TIP
• Refer to "CAMSHAFTS" on page 5-13.
• Lubricate the camshaft lobes and camshaft
journals.
• First, install the exhaust camshaft.
• Align the camshaft sprocket marks with the
camshaft cylinder head surface.
• Turn the crankshaft counterclockwise several
full turns to seat the parts.
h. Measure the valve clearance again.
email: info@motomatrix.co.uk
No. 160–240
1.60–2.40 mm
(0.0630–0.0945 in)
17 thicknesses in
0.05 mm (0.0022 in)
increments
PERIODIC MAINTENANCE
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 proce-
dure.
EAS20571

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 hoses
• Air induction system
• Exhaust system
• Breather hoses
• Vacuum 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" 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"
3-9

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