Checking The Spark Plug - Yamaha Grizzly550 User Manual

2. Adjust:
• Speed limiter length "a"
M MMM M MMM M M MMM M M MMM M
a. Loosen the locknut "1".
b. Turn the adjuster "2" in direction "b" or "c" until
the specified speed limiter length is obtained.
Direction "b"
Speed limiter length is decreased.
Direction "c"
Speed limiter length is increased.
a
c. Tighten the locknut.
EWA14880
WARNING
• Particularly for a beginner rider, the speed
limiter should be screwed in completely.
Screw it out little by little as their riding
technique improves. Never remove the
speed limiter for a beginning rider.
• For proper throttle lever operation, do not
turn out the adjuster more than the speci-
fied length. Also, always adjust the throttle
cable free play to within specification.
L LLL L LLL L L LLL L L LLL L
EAS20690

CHECKING THE SPARK PLUG

1. Remove:
• Right side panel
Refer to "GENERAL CHASSIS" on page 4-1.
2. Disconnect:
• Spark plug cap
3. Remove:
• Spark plug
ECA13330
NOTICE
Before removing the spark plug, blow away
any dirt accumulated in the spark plug well
with compressed air to prevent it from falling
into the cylinder.
4. Check:
• Spark plug type
Incorrect → Change.
M MMM M M MMM M MMM
2
1
b
c
L LLL L L LLL L LLL
3-7
Manufacturer/model
NGK/LMAR6A-9
5. Check:
• Electrode "1"
Damage/wear → Replace the spark plug.
• 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.
Spark plug gap
0.8–0.9 mm (0.031–0.035 in)
8. Install:
• Spark plug
Spark plug
13 Nm (1.3 m·kg, 9.4 ft·lb)
TIP
Before installing the spark plug, clean the spark
plug and gasket surface.
9. Connect:
• Spark plug cap
ENGINE