Yamaha TT-R125LE, Owner'S Manual

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PERIODIC MAINTENANCE AND ADJUSTMENT
7-6
7
EAU18751
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.
EAU19210
Panel
To remove the panel
Remove the screws, and then take the
panel off.
To install the panel
Place the panel in the original position,
and then install the screws.
EAU19622
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.
1. Panel
1. Bolt
2. Panel
Specified spark plug:
NGK/DR8EA
U1C618E0.book Page 6 Thursday, June 2, 2011 1:09 PM