Adjusting The Valve Clearance - Yamaha R1 Series 2015 Service Manual

• Spark plugs
ECA13320
NOTICE
Before removing the spark plugs, blow away
any dirt accumulated in the spark plug wells
with compressed air to prevent it from falling
into the cylinders.
3. Check:
• Spark plug type
Incorrect Change.
Manufacturer/model
NGK/LMAR9E-J
4. Check:
• Electrode "1"
Damage/wear Replace the spark plug.
• Insulator "2"
Abnormal color
Normal color is medium-to-light tan.
5. Clean:
• Spark plug
(with a spark plug cleaner or wire brush)
6. Measure:
• Spark plug gap "a"
(with a wire thickness gauge)
Out of specification
Spark plug gap
0.6–0.7 mm (0.024–0.028 in)
1
1
7. Install:
• Spark plugs
• Ignition coils
Spark plug
13 Nm (1.3 m·kgf, 9.4 ft·lbf)
Spark plug (new)
18 Nm (1.8 m·kgf, 13 ft·lbf)
TIP
• Before installing the spark plug, clean the
spark plug and gasket surface.
• If the spark plug is a new one, tighten it to 18
Replace the spark plug.
Regap.
2
1
a a
PERIODIC MAINTENANCE
Nm (1.8 m·kgf, 13 ft·lbf).
8. Install:
• Air cut-off valve
Refer to "AIR INDUCTION SYSTEM" on
page 7-19.
• Air filter case
Refer to "AIR FILTER CASE" on page 7-4.
• Fuel tank
Refer to "FUEL TANK" on page 7-1.
• Fuel tank cover
Refer to "GENERAL CHASSIS (2)" on page
4-7.
• Rider seat
Refer to "GENERAL CHASSIS (1)" on page
4-1.
EAS30622

ADJUSTING THE VALVE CLEARANCE

The following procedure applies to all of the
valves.
TIP
• Valve clearance adjustment should be made
on a cold engine, at room temperature.
• When the valve clearance is to be measured or
adjusted, the piston must be at top dead center
(TDC) on the compression stroke.
1. Remove:
• Rider seat
Refer to "GENERAL CHASSIS (1)" on page
4-1.
• Fuel tank cover/Front side cowling/Front pan-
el/Side cover bracket
Refer to "GENERAL CHASSIS (2)" on page
4-7.
• Fuel tank
Refer to "FUEL TANK" on page 7-1.
• Air filter case
Refer to "GENERAL CHASSIS (3)" on page
4-17.
• Air cut-off valve
Refer to "AIR INDUCTION SYSTEM" on
page 7-19.
• Radiator
Refer to "RADIATOR" on page 6-1.
2. Remove:
• Ignition coils
• Spark plugs
• Cylinder head cover
• Cylinder head cover gasket
Refer to "CAMSHAFTS" on page 5-9.
3. Remove:
• Timing mark accessing bolt "1"
• Crankshaft end cover "2"
3-5