Removing And Installing The Panel; Checking The Spark Plug - Yamaha wr450fb Owner's Manual

Removing and installing the
panel
The panel shown needs to be removed
to perform some of the maintenance
jobs described in this chapter. Refer to
this section each time the panel needs
to be removed and installed.
1
1. Panel A
Panel A
To remove the panel
1. Remove the seat.
page 4-13.)
2. Remove the bolts.
PERIODIC MAINTENANCE AND ADJUSTMENT
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
(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.
Specified spark plug:
Before installing a spark plug, the spark
plug gap should be measured with a
7-7
NGK/CR8E
EAU19622
2
3
4
5
6
7
8
9