Adjusting The Engine Idling Speed - Yamaha YZF-R15 Service Manual

c. Turn the adjusting screw "3" in direction "a" or
"b" until the specified valve clearance is ob-
tained.
Direction "a"
Valve clearance is increased.
Direction "b"
Valve clearance is decreased.
Tappet screw holder
YSST-706
Tappet adjusting socket
YSST-706A
Hold the adjusting screw to prevent it from
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moving and tighten the locknut to specifica-
tion.
Locknut
7 Nm (0.7 m·kg, 5.1 ft·lb)
d. Measure the valve clearance again.
e. 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.
s s s s s s s s s s s s s s s s s s s s s s s s
7. Install:
Crankshaft end accessing screw
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(along with the O-ring
Timing mark accessing screw
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(along with the O-ring
1
2
a
3
b b
New
)
New )
3-4
8. Install:
Cylinder head cover gasket
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Cylinder head cover
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Refer to "CYLINDER HEAD" on page 5-6.
Reed valve plate
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Reed valve
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Air cut-off valve
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Refer to "AIR INDUCTION SYSTEM" on
page 7-9.
9. Connect:
Air induction system hose (3-way joint to air
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cut-off valve)
Air induction system vacuum hose
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Refer to "AIR INDUCTION SYSTEM" on
page 7-9.
Spark plug cap
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10.Install:
Fuel tank
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Refer to "FUEL TANK " on page 7-1.
Seat
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Front panels
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Refer to "GENERAL CHASSIS" on page 4-1.

ADJUSTING THE ENGINE IDLING SPEED

NOTE:
Prior to adjusting the engine idling speed, the air
filter element should be clean, and the engine
should have adequate compression.
1. Start the engine and let it warm up for several
minutes.
2. Remove:
Seat
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Refer to "GENERAL CHASSIS" on page 4-1.
3. Lift the front of the fuel tank. (Do not discon-
nect the fuel hose.)
4. Install:
Digital tachometer
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(onto the spark plug lead)
5. Check:
Engine idling speed
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Out of specification → Adjust.
Engine idling speed
1300–1500 r/min
6. Remove:
Right side panel
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Refer to "GENERAL CHASSIS" on page 4-1.
7. Adjust:
Engine idling speed
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ENGINE
New