Checking The Spark Plugs - Yamaha 2011 V Star XVS650AA Owner's Manual

Panel B
To remove the panel
Remove the bolt, and then pull the pan-
el off as shown.
1. Bolt
To install the panel
Place the panel in the original position,
and then install the bolt.
PERIODIC MAINTENANCE AND ADJUSTMENT
EAU19151

Checking the spark plugs

The spark plugs are important engine
components, which are easy to check.
Since heat and deposits will cause any
spark plug to slowly erode, the spark
plugs should be removed and checked
in accordance with the periodic mainte-
nance and lubrication chart. In addition,
the condition of the spark plugs can re-
veal the condition of the engine.
To remove a spark plug
1. Remove the spark plug cap.
1. Spark plug cap
2. Remove the spark plug as shown,
with the spark plug wrench includ-
ed in the owner's tool kit.
EAU19545
1. Spark plug wrench
To check the spark plugs
1. Check that the porcelain insulator
2. Check that all spark plugs installed
TIP
If any spark plug shows a distinctly dif-
ferent color, the engine could be oper-
ating improperly. Do not attempt to
diagnose such problems yourself. In-
stead, have a Yamaha dealer check
the vehicle.
7-9
around the center electrode on
each spark plug is a medium-to-
light tan (the ideal color when the
vehicle is ridden normally).
in the engine have the same color.
7