Removing And Installing The Panel; Checking The Spark Plug - Yamaha WR450F Owner's Manual

PERIODIC MAINTENANCE AND ADJUSTMENT
Removing and installing the
panel
1
The panel shown needs to be removed
to perform some of the maintenance
jobs described in this chapter. Refer to
2
this section each time the panel needs
to be removed and installed.
3
1
4
5
6
7
1. Panel A
8
9
Panel A
To remove the panel
1. Remove the
page 3-13.)
2. Remove the bolts.
EAU18751
1
1. Bolt
3. Pull the front part of the panel out-
ward, and then remove the panel
by pulling it off.
To install the panel
1. Place the panel in the original posi-
tion, and then install the bolts.
EAU52872
seat. (See
2. Install the seat.

Checking the spark plug

The spark plug is an important engine
1
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
plug gap should be measured with a
6-7
Specified spark plug:
NGK/CR8E
EAU19622