2003 YAMAHA TMAX maintenance

6-6
PERIODIC MAINTENANCE AND MINOR REPAIR
6
EAU01139
Removing and installing
cowlings and panels
Cowlings and panels, removing and installing
The cowlings and panels shown
above need to be removed to per-
form some of the maintenance jobs
described in this chapter. Refer to
this section each time a cowling or
panel needs to be removed and
installed.
4
3
1 2
1. Panel A
2. Panel B
3. Panel C
4. Cowling A
EAU03878
Panels A and D
To remove one of the panels
1. Remove panel C (right side) or
panel E (left side).
2. Remove the panel screws.
3. Pull outward on the front of the
panel.
1
1. Screw (×3)
1
23
4
5
1. Panel D
2. Cowling B
3. Panel E
4. Cowling C
5. Panel F
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PERIODIC MAINTENANCE AND MINOR REPAIR
6To install the panel
Place the panel in the original posi-
tion, and then install the screws.
Panels C and E
To remove one of the panels
Pull the floorboard mat off, and then
remove the panel screws.
To install the panel
Place the panel in the original posi-
tion, install the screws, and then
place the floorboard mat back.
1
1. Screw (×4)
Panel B
To remove the panel
Remove the panel screws, and then
pull outward on the areas shown.
To install the panel
Place the panel in the original posi-
tion, and then install the screws.
1
1
1. Screw (×3)
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PERIODIC MAINTENANCE AND MINOR REPAIR
6 Cowling A
To remove the cowling
1. Remove the rear view mirrors by
removing the nuts.
2. Remove the cowling screws.
To install the cowling
1. Place the cowling in the original
position, and then install the
screws.
2. Install the rear view mirrors by
installing the nuts.
21
2
1. Screw (×2)
2. Nut (×4)
Cowling B
To remove the cowling
1. Remove panels C and E.
2. Remove the cowling screws and
bolts.
3. Unhook the cowling from the
holder at the bottom.
4. Unhook the front of the cowling
by pushing it up, and then pull
the cowling out.
1
2
1. Bolt (×2)
2. Screw (×2)
Panel F
To remove the panel
Remove the panel screws.
To install the panel
1. Place the panel in the original
position, and then install the
screws.
1
1. Screw (×2)
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PERIODIC MAINTENANCE AND MINOR REPAIR
6To install the cowling
1. Place the cowling in the original
position, and then install the
screws and bolts.
2. Install panels C and E.
EAU03816
Checking the spark plugsSpark plugs, checking
The spark plugs are important engine
components, which are easy to
check. Since heat and deposits will
cause any spark plug to slowly erode,
the spark plugs should be removed
and checked in accordance with the
periodic maintenance and lubrication
chart. In addition, the condition of the
spark plugs can reveal the condition
of the engine. Cowling C
To remove the cowling
1. Remove the cowling bolts.
2. Remove the battery cover by
removing the screws.
3. Pull the cowling off.
To install the cowling
1. Install the battery cover by
installing the screws.
2. Place the cowling in the original
position, and then install the
bolts.
1
2
1. Bolt (×2)
2. Screw (×3)
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PERIODIC MAINTENANCE AND MINOR REPAIR
6 To remove a spark plug
1. Remove cowling B. (See page
6-8 for cowling removal and
installation procedures.)
2. Remove the spark plug cover by
pulling it out as shown.
1
1. Spark plug cover
4. Remove the spark plug as
shown with the spark plug
wrench included in the owner’s
tool kit.
1
1. Spark plug wrench
3. Remove the spark plug cap.
1
1. Spark plug cap
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PERIODIC MAINTENANCE AND MINOR REPAIR
6To check the spark plugs
1. Check that the porcelain insula-
tor around the center electrode
on each spark plug is a medium-
to-light tan (the ideal color when
the scooter is ridden normally).
2. Check that all spark plugs
installed in the engine have the
same color.
NOTE:
If any spark plug shows a distinctly
different color, the engine could be
defective. Do not attempt to diagnose
such problems yourself. Instead,
have a Yamaha dealer check the
scooter.
3. Check each spark plug for elec-
trode erosion and excessive car-
bon or other deposits, and
replace it if necessary.
NOTE:
If a torque wrench is not available
when installing a spark plug, a good
estimate of the correct torque is
1/4–1/2 turn past finger tight.
However, the spark plug should be
tightened to the specified torque as
soon as possible.
4. Install the spark plug cap. To install a spark plug
1. Measure the spark plug gap with
a wire thickness gauge and, if
necessary, adjust the gap to
specification.
2. Clean the surface of the spark
plug gasket and its mating sur-
face, and then wipe off any grime
from the spark plug threads.
3. Install the spark plug with the
spark plug wrench, and then
tighten it to the specified torque.
a
a. Spark plug gap
Specified spark plug:
CR7E (NGK)
Spark plug gap:
0.7–0.8 mm
Tightening torque:
Spark plug:
12.5 Nm (1.25 m·kgf)
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PERIODIC MAINTENANCE AND MINOR REPAIR
6 5. Place the spark plug cover in the
original position as shown, and
then install the cowling.
1
1. Spark plug cover
2. Start the engine, warm it up for
two minutes, and then turn it off.
3. Wait two minutes until the oil set-
tles, and then check the oil level
through the check window locat-
ed at the bottom-left side of the
crankcase.
NOTE:
The engine oil should be between the
minimum and maximum level marks.
1
32
1. Engine oil level check window
2. Maximum level mark
3. Minimum level mark
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Engine oil and oil filter
cartridge
Engine oil and oil filter cartridge
The engine oil level should be
checked before each ride. In addition,
the oil must be changed and the oil
filter cartridge replaced at the inter-
vals specified in the periodic mainte-
nance and lubrication chart.
To check the engine oil level
1. Place the scooter on the center-
stand.
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cC
The engine must be cold before
proceeding with the oil level
check, otherwise the check will
result in a false reading.
NOTE:
Make sure that the scooter is posi-
tioned straight up when checking the
oil level. A slight tilt to the side can
result in a false reading.
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PERIODIC MAINTENANCE AND MINOR REPAIR
64. If the engine oil is below the min-
imum level mark, add sufficient
oil of the recommended type to
raise it to the correct level.
2
1
3
1. Maximum level mark
2. Minimum level mark
3. Engine oil drain bolt
4. Remove the oil filter cartridge
with an oil filter wrench.
NOTE:
An oil filter wrench is available at a
Yamaha dealer.
5. Apply a thin coat of engine oil to
the O-ring of the new oil filter
cartridge.
NOTE:
Make sure that the O-ring is properly
seated.
2
1
1. Oil filter wrench
2. Oil filter cartridge
To change the engine oil (with or
without oil filter cartridge replace-
ment)
1. Start the engine, warm it up for
several minutes, and then turn it
off.
2. Place an oil pan under the
engine to collect the used oil.
3. Remove the engine oil filler cap
and drain bolt to drain the oil
from the crankcase.
NOTE:
Skip steps 4–6 if the oil filter cartridge
is not being replaced.
1
1. Engine oil filler cap
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