Checking The Spark Plug - Yamaha XMAX YP250R Owner's Manual

PERIODIC MAINTENANCE AND ADJUSTMENT
Panel A
To remove the panel
1. Open the storage compartment.
(See page 3-16).
2. Remove the screw, and then take
the panel off.
6
1. Screw
To install the panel
1. Place the panel in the original
position, and then install the
screw.
2. Close the storage compartment.
EAUM1250

Checking the spark plug

The spark plug is an important engine
component, which is easy to check.
Since heat and deposits will cause
any spark plug to slowly erode, the
spark plug should be removed and
checked in accordance with the
periodic maintenance and lubrication
chart. In addition, the condition of the
spark plug can reveal the condition of
the engine.
To remove the spark plug
1. Remove cowling D. (See page
6-6).
2. Remove the spark plug cap.
1. Spark plug cap
EAU19632 3. Remove the spark plug as
1. Spark plug wrench
To check the spark plug
1. Check that the porcelain insula-
1
TIP
If the spark plug shows a distinctly
different color, the engine could be
operating improperly. Do not attempt
to diagnose such problems yourself.
Instead, have a Yamaha dealer check
the vehicle.
6-8
shown, with the spark plug
wrench included in the owner's
tool kit.
1
tor around the center electrode of
the spark plug is a medium-to-
light tan (the ideal color when the
vehicle is ridden normally).