Perio
d
ic maintenance an
d
a
d
justment
9-8
9
EAU18752
Removin
g
an
d
installin
g
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.
EAUN3931
Panel A
To remove the panel
Remove the screws, and then pull the
panel outward and slide it forward as
shown.
To install the panel
Place the panel in the original position,
and then install the screws.
EAU19623
Checkin
g
the spark plu
g
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
accordance with the periodic mainte-
nance and lubrication chart. In addi-
tion, the condition of the spark plug
can reveal the condition of the engine.
The porcelain insulator around the
center 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 different color, the engine
could be operating improperly. Do not
attempt to diagnose such problems
yourself. Instead, have a Yamaha deal-
er check the vehicle.
If the spark plug shows signs of elec-
trode erosion and excessive carbon or
other deposits, it should be replaced.
1. Panel A
1
1. Panel A
2. Screw
1
2
Specifie
d
spark plu
g
:
NGK/LMAR8A-9
UBKA10E0.book Page 8 Thursday, September 22, 2022 1:40 PM
