Adjusting The Throttle Cable Free Play; Checking The Spark Plugs - Yamaha Vmax VMX17C 2009 Service Manual

EAS20630
ADJUSTING THE THROTTLE CABLE FREE
PLAY
TIP
Prior to adjusting the throttle cable free play, the
engine idling speed and throttle body synchroni-
zation should be adjusted properly.
1. Check:
• Throttle cable free play "a"
Out of specification → Adjust.
Throttle cable free play
3.0–5.0 mm (0.12–0.20 in)
2. Adjust:
• Throttle cable free play
M MMM M MMM M M MMM M M MMM M
a. Slide back the rubber cover "1".
b. Loosen the locknut "2".
c. Turn the adjusting nut "3" in direction "a" or "b"
until the specified throttle cable free play is
obtained.
Direction "a"
Throttle cable free play is increased.
Direction "b"
Throttle cable free play is decreased.
d. Tighten the locknut.
e. Slide the rubber cover to its original position.
1 2 3
L LLL L LLL L L LLL L L LLL L
a
M MMM M M MMM M MMM
a
b
L LLL L L LLL L LLL
3-9
EAS20680

CHECKING THE SPARK PLUGS

The following procedure applies to all of the
spark plugs.
1. Remove:
• Battery box
Refer to "GENERAL CHASSIS" on page 4-1.
2. Disconnect:
• Spark plug cap
3. Remove:
• Spark plug
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.
4. Check:
• Spark plug type
Incorrect → Change.
Manufacturer/model
NGK/CR9EIA
Manufacturer/model
DENSO/IU27D
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)
ECA2S31057
NOTICE
Do not use a wire brush to clean the spark
plugs, as it will damage the iridium coating
on the electrode.
7. Measure:
• Spark plug gap "a"
(with a wire thickness gauge)
Out of specification → Replace.
Spark plug gap
0.8–0.9 mm (0.031–0.035 in)
ENGINE