Yamaha 2008 WR250R, Owner'S Manual

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PERIODIC MAINTENANCE AND MINOR REPAIR
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Panel D
To remove the panel
1. Remove the seat. (See
page 3-12.)
2. Remove the bolt and washer, and
then remove the panel as shown.
To install the panel
1. Place the panel in the original po-
sition, and then install the washer
and bolt.
2. Install the seat.
EAU19621
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.
Before installing a spark plug, the spark
1. Bolt
2. Washer
3. Panel D
3
2
1
Specified spark plug:
NGK/CR9EK