ENGINE
3-10
• Insulator “2”
Abnormal color → Replace the spark plug.
Normal color is medium-to-light tan.
6. Clean:
• Spark plug
(with a spark plug cleaner or wire brush)
7. Measure:
• Spark plug gap “a”
(with a wire thickness gauge)
Out of specification → Regap.
8. Install:
• Spark plug
NOTE:
Before installing the spark plug, clean the spark
plug and gasket surface.
9. Connect:
• Spark plug
10.Install:
• T-bar
Refer to “GENERAL CHASSIS” on page 4-1.
• Fuel tank
Refer to “FUEL TANK” on page 7-1.
• Rider seat
Refer to “GENERAL CHASSIS” on page 4-1.
EAS20700
CHECKING THE IGNITION TIMING
NOTE:
Prior to checking the ignition timing, check the
wiring connections of the entire ignition system.
Make sure all connections are tight and free of
corrosion.
1. Stand the vehicle on a level surface.
NOTE:
Place the vehicle on the centerstand.
2. Remove:
• Right side cowling
• Rider seat
Refer to “GENERAL CHASSIS” on page 4-1.
• Fuel tank
Refer to “FUEL TANK” on page 7-1.
• T-bar
Refer to “GENERAL CHASSIS” on page 4-1.
3. Remove:
• Timing mark accessing plug “1”
(along with the copper washer)
4. Connect:
• Timing light “1”
(onto the spark plug lead of cylinder #1)
• Digital tachometer
(onto the spark plug lead of cylinder #1)
5. Install:
• Fuel tank
Refer to “FUEL TANK” on page 7-1.
6. Check:
• Ignition timing
▼▼▼▼▼▼▼▼▼ ▼ ▼▼▼▼ ▼ ▼▼▼▼ ▼ ▼▼▼▼ ▼ ▼▼▼▼ ▼▼▼
a. Start the engine, warm it up for several min-
utes, and then let it run at the specified en-
gine idling speed.
Spark plug gap
0.7–0.8 mm (0.028–0.031 in)
T
R
.
.
Spark plug
13 Nm (1.3 m·kg, 9.4 ft·lb)
Timing light
90890-03141
Inductive clamp timing light
YU-03141
Engine idling speed
1000–1100 r/min
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