Checking The Spark Plug - Yamaha XMAX YP125R Sports Owner's Manual

Panel A
To remove the panel
1. Open the seat. (See page 3-17.)
2. Remove the screws, and then pull
the panel outward.
TIP
For the Business version, the rear car-
rier and travel trunk are not shown for
better understanding.
For the Sport version, the backrest is
not shown for better understanding.
PERIODIC MAINTENANCE AND ADJUSTMENT
EAUS2031
To install the panel
1. Place the panel in the original posi-
tion, and then install the screws.
2. Close the seat.

Checking the spark plug

The spark plug is an important engine
component, which should be checked
periodically, preferably by a Yamaha
dealer. Since heat and deposits will
cause any spark plug to slowly erode, it
should be removed and checked in ac-
cordance with the periodic mainte-
nance and lubrication chart. In addition,
the condition of the spark plug can re-
veal the condition of the engine.
The porcelain insulator around the cen-
ter electrode of the spark plug should
be a medium-to-light tan (the ideal color
when the vehicle is ridden normally). If
the spark plug shows a distinctly differ-
ent color, the engine could be operating
improperly. Do not attempt to diagnose
such problems yourself. Instead, have
a Yamaha dealer check the vehicle.
If the spark plug shows signs of elec-
trode erosion and excessive carbon or
other deposits, it should be replaced.
6-9
Specified spark plug:
NGK/CPR9EA-9
EAU19622
6