2004 YAMAHA TMAX engine

PERIODIC MAINTENANCE AND MINOR REPAIR
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EAU25911
Troubleshooting charts
Starting problems or poor engine
performance
WARNING

EWA10840
Keep away open flames and do not smoke while checking or working on the fuel system.
Check the fuel level in
the fuel tank.1. Fuel
There is enough fuel.
There is no fuel.
Check the compression.
Supply fuel.
The engine does not start.
Check the compression.
Operate the electric starter.2. Compression
There is compression.
There is no compression.
Check the ignition.
Have a Yamaha dealer
check the vehicle.
Remove the spark plugs
and check the electrodes.3. Ignition
Wipe off with a dry cloth and correct the
spark plug gaps, or replace the spark plugs.
Have a Yamaha dealer check the vehicle.
The engine does not start.
Have a Yamaha dealer
check the vehicle.
The engine does not start.
Check the battery.
Operate the electric starter.4. Battery
The engine turns over
quickly.
The engine turns over
slowly.
The battery is good.Check the battery lead connections,
and charge the battery if necessary.
DryWet
Open the throttle halfway and operate
the electric starter.

PERIODIC MAINTENANCE AND MINOR REPAIR
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9 Engine overheating
WARNING

EWA10400

Do not remove the radiator cap when the engine and radiator are hot. Scalding hot fluid and steam may be
blown out under pressure, which could cause serious injury. Be sure to wait until the engine has cooled.

After removing the radiator cap retaining bolt, place a thick rag, like a towel, over the radiator cap, and then
slowly rotate the cap counterclockwise to the detent to allow any residual pressure to escape. When the hissing
sound has stopped, press down on the cap while turning it counterclockwise, and then remove the cap.
NOTE:

If coolant is not available, tap water can be temporarily used instead, provided that it is changed to the recommended coolant
as soon as possible.
Wait until the
engine has cooled.
Check the coolant level in the
reservoir and radiator.
The coolant level
is OK.The coolant level is low.
Check the cooling system
for leakage.
Have a Yamaha dealer checkand repair the cooling system.Add coolant. (See NOTE.)
Start the engine. If the engine overheats again,
have a
Yamaha dealer check
and repair the cooling system.
There is
leakage.
There is
no leakage.

SCOOTER CARE AND STORAGE
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EAU26100
Care
While the open design of a scooter re-
veals the attractiveness of the technol-
ogy, it also makes it more vulnerable.
Rust and corrosion can develop even if
high-quality components are used. A
rusty exhaust pipe may go unnoticed
on a car, however, it detracts from the
overall appearance of a scooter. Fre-
quent and proper care does not only
comply with the terms of the warranty,
but it will also keep your scooter looking
good, extend its life and optimize its
performance.
Before cleaning
1. Cover the muffler outlet with a
plastic bag after the engine has
cooled down.
2. Make sure that all caps and covers
as well as all electrical couplers
and connectors, including the
spark plug cap, are tightly in-
stalled.
3. Remove extremely stubborn dirt,
like oil burnt onto the crankcase,
with a degreasing agent and abrush, but never apply such prod-
ucts onto seals, gaskets and wheel
axles. Always rinse the dirt and de-
greaser off with water.
Cleaning
CAUTION:

ECA10780

Avoid using strong acidic wheel
cleaners, especially on spoked
wheels. If such products are
used on hard-to-remove dirt, do
not leave the cleaner on the af-
fected area any longer than in-
structed. Also, thoroughly rinse
the area off with water, immedi-
ately dry it, and then apply a cor-
rosion protection spray.

Improper cleaning can damage
windshields, cowlings, panels
and other plastic parts. Use only
a soft, clean cloth or sponge
with mild detergent and water to
clean plastic.

Do not use any harsh chemical
products on plastic parts. Be
sure to avoid using cloths or
sponges which have been incontact with strong or abrasive
cleaning products, solvent or
thinner, fuel (gasoline), rust re-
movers or inhibitors, brake flu-
id, antifreeze or electrolyte.

Do not use high-pressure wash-
ers or steam-jet cleaners since
they cause water seepage and
deterioration in the following ar-
eas: seals (of wheel and swing-
arm bearings, fork and brakes),
electric components (couplers,
connectors, instruments,
switches and lights), breather
hoses and vents.

For scooters equipped with a
windshield: Do not use strong
cleaners or hard sponges as
they will cause dulling or
scratching. Some cleaning com-
pounds for plastic may leave
scratches on the windshield.
Test the product on a small hid-
den part of the windshield to
make sure that it does not leave
any marks. If the windshield is

SCOOTER CARE AND STORAGE
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9treat them with a suitable care
product.


Avoid using abrasive polishing
compounds as they will wear
away the paint.
NOTE:

Consult a Yamaha dealer for advice on
what products to use.
EAU26310
Storage
Short-term
Always store your scooter in a cool, dry
place and, if necessary, protect it
against dust with a porous cover.
CAUTION:

ECA10820

Storing the scooter in a poorly
ventilated room or covering it
with a tarp, while it is still wet,
will allow water and humidity to
seep in and cause rust.

To prevent corrosion, avoid
damp cellars, stables (because
of the presence of ammonia)
and areas where strong chemi-
cals are stored.
Long-term
Before storing your scooter for several
months:
1. Follow all the instructions in the
“Care” section of this chapter.
2. Drain the carburetor float cham-
bers by loosening the drain bolts;
this will prevent fuel deposits from
building up. Pour the drained fuelinto the fuel tank.
3. Fill up the fuel tank and add fuel
stabilizer (if available) to prevent
the fuel tank from rusting and the
fuel from deteriorating.
4. Perform the following steps to pro-
tect the cylinders, piston rings, etc.
from corrosion.
a. Remove the spark plug caps
and the spark plugs.
b. Pour a teaspoonful of engine oil
into the spark plug bores.
c. Install the spark plug caps onto
the spark plugs, and then place
the spark plugs on the cylinder
head so that the electrodes are
grounded. (This will limit spark-
ing during the next step.)
d. Turn the engine over several
times with the starter. (This will
coat the cylinder walls with oil.)
e. Remove the spark plug caps
from the spark plugs, and then
install the spark plugs and the
spark plug caps.

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WARNING

EWA10950
To prevent damage or injury from
sparking, make sure to ground the
spark plug electrodes while turning
the engine over.
5. Lubricate all control cables and the
pivoting points of all levers and
pedals as well as of the sidestand/
centerstand.
6. Check and, if necessary, correct
the tire air pressure, and then lift
the scooter so that both of its
wheels are off the ground. Alterna-
tively, turn the wheels a little every
month in order to prevent the tires
from becoming degraded in one
spot.
7. Cover the muffler outlet with a
plastic bag to prevent moisture
from entering it.
8. Remove the battery and fully
charge it. Store it in a cool, dry
place and charge it once a month.
Do not store the battery in an ex-
cessively cold or warm place[less than 0 °C (30 °F) or more
than 30 °C (90 °F)]. For more in-
formation on storing the battery,
see page 6-27.
NOTE:

Make any necessary repairs before
storing the scooter.

SPECIFICATIONS
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EAU26333
Dimensions:
Overall length:
2235 mm (88.0 in)
Overall width:
775 mm (30.5 in)
Overall height:
1410 mm (55.5 in)
Seat height:
795 mm (31.3 in)
Wheelbase:
1575 mm (62.0 in)
Ground clearance:
130 mm (5.12 in)
Minimum turning radius:
2800 mm (110.2 in)
Weight:
With oil and fuel:
225.0 kg (496 lb)
Engine:
Engine type:
Liquid cooled 4-stroke, DOHC
Cylinder arrangement:
Forward-inclined parallel 2-cylinder
Displacement:
499.0 cm
3

(30.45 cu.in)
Bore
×
stroke:
66.0
×
73.0 mm (2.60
×
2.87 in)
Compression ratio:
11.00 :1
Starting system:
Electric starter
Lubrication system:
Dry sump

Engine oil:
Type:
SAE10W30 or SAE10W40
Recommended engine oil grade:
API service SE, SF, SG type or higher
Engine oil quantity:
Without oil filter cartridge replacement:
2.80 L (2.96 US qt) (2.46 Imp.qt)
With oil filter cartridge replacement:
2.90 L (3.07 US qt) (2.55 Imp.qt)
Chain drive oil:
Type:
SAE80 API GL-4 Hypoid gear oil
Quantity:
0.6–0.7 L (0.63–0.74 US qt) (0.53–0.62
Imp.qt)
Cooling system:
Coolant reservoir capacity (up to the maxi-
mum level mark):
0.35 L (0.37 US qt) (0.31 Imp.qt)
Radiator capacity (including all routes):
1.50 L (1.59 US qt) (1.32 Imp.qt)
Air filter:
Air filter element:
Dry element
Fuel:
Recommended fuel:
Regular unleaded gasoline only
Fuel tank capacity:
14.0 L (3.70 US gal) (3.08 Imp.gal)
Electronic fuel injection:
Manufacturer:
AISAN
Model:
1100-87B60/1100-87B70
Spark plug(s):
Manufacturer/model:
NGK/CR7E
Spark plug gap:
0.7–0.8 mm (0.028–0.031 in)
Clutch:
Clutch type:
Wet, multiple-disc automatic
Transmission:
Primary reduction system:
Spur gear/helical gear
Primary reduction ratio:
52/32
×
36/22 (2.659)
Secondary reduction system:
Chain drive
Secondary reduction ratio:
41/25
×
40/29 (2.262)
Transmission type:
V-belt automatic

SPECIFICATIONS
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9Headlight:

Bulb type:
Halogen bulb
Bulb voltage, wattage x quantity:
Headlight:
12 V, 60 W/55.0 W
×
1
Headlight:
12 V, 55.0 W
×
1
Tail/brake light:
12 V, 5.0/21.0 W
×
2
Front turn signal/position light:
12 V, 21 W/5.0 W
×
2
Rear turn signal light:
12 V, 21.0 W
×
2
Auxiliary light:
12 V, 5.0 W
×
2
Licence plate light:
12 V, 5.0 W
×
1
Meter lighting:
14 V, 2.0 W
×
3
High beam indicator light:
14 V, 1.4 W
×
1
Turn signal indicator light:
14 V, 1.4 W
×
1
Engine trouble warning light:
14 V, 1.4 W
×
1
Immobilizer system indicator light:
LED

Fuses:
Main fuse:
30.0 A
Headlight fuse:
15.0 A Signaling system fuse:
20.0 A
Ignition fuse:
10.0 A
Parking lighting fuse:
10.0 A
Radiator fan fuse:
15.0 A
Electronic fuel injection fuse:
10.0 A
Backup fuse:
10.0 A