check engine YAMAHA TMAX 2001 Owner's Manual

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EAU00630
Adjusting the carburetorsThe carburetors are important parts
of the engine and require very
sophisticated adjustment. Therefore,
most carburetor adjustments should
be left to a Yamaha dealer, who has
the necessary professional knowl-
edge and experience. The adjust-
ment described in the following sec-
tion, however, may be serviced by
the owner as part of routine mainte-
nance.
EC000095
cCThe carburetors have been set and
extensively tested at the Yamaha
factory. Changing these settings
without sufficient technical knowl-
edge may result in poor perfor-
mance of or damage to the engine.
EAU03821
Adjusting the engine idling
speedThe engine idling speed must be
checked and, if necessary, adjusted
as follows at the intervals specified in
the periodic maintenance and lubrica-
tion chart.NOTE:
A diagnostic tachometer is needed to
make this adjustment.1. Remove panel B. (See page 6-7
for panel removal and installation
procedures.)
2. Attach the tachometer to the
spark plug lead.
3. Start the engine and warm it up
for several minutes at
1,000–2,000 r/min while occa-
sionally revving it to 4,000–5,000
r/min.
NOTE:
The engine is warm when it quickly
responds to the throttle.4. Check the engine idling speed
and, if necessary, adjust it to
specification by turning the throt-
tle stop screw. To increase the
engine idling speed, turn the
screw in direction a. To
decrease the engine idling
speed, turn the screw in direction
b.
1a
b
1. Throttle stop screw
Engine idling speed:
1,150–1,200 r/min
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EAU00637
Adjusting the valve
clearanceThe valve clearance changes with
use, resulting in improper air-fuel mix-
ture and/or engine noise. To prevent
this from occurring, the valve clear-
ance must be adjusted by a Yamaha
dealer at the intervals specified in the
periodic maintenance and lubrication
chart.
NOTE:
If the specified idling speed cannot
be obtained as described above,
have a Yamaha dealer make the
adjustment.5. Install the panel.
EAU00635
Adjusting the throttle cable
free playThe throttle cable free play should
measure 3–5 mm at the throttle grip.
Periodically check the throttle cable
free play and, if necessary, have a
Yamaha dealer adjust it.
a
a. Throttle cable free play
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EAU03764
Checking and lubricating the
throttle grip and cableThe operation of the throttle grip and
the condition of the throttle cable
should be checked before each ride,
and the cable should be lubricated or
replaced if necessary.NOTE:
Since the throttle grip must be
removed to access the throttle cable
end, the throttle grip and the cable
should always be lubricated at the
same time.1. Remove the throttle grip by
removing the screws.
2. Hold up the throttle cable, and
then apply several drops of oil to
the cable, allowing it to trickle
into the sheaths.
3. Grease the inside of the throttle
grip housing.Recommended lubricant:
Lithium-soap-based grease
(all-purpose grease)
4. Grease the metal-to-metal con-
tact surface of the throttle grip,
and then install the grip by
installing the screws.
Recommended lubricant:
Throttle cable:
Engine oil
Throttle grip housing and grip:
Lithium-soap-based grease
(all-purpose grease)
EAU03118
Lubricating the front and
rear brake leversThe pivoting points of the front and
rear brake levers must be lubricated
at the intervals specified in the peri-
odic maintenance and lubrication
chart.
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9To check the operation
1. Place the scooter on a level sur-
face and hold it in an upright
position.
2. While applying the front brake,
push down hard on the handle-
bars several times to check if the
front fork compresses and
rebounds smoothly.
EC000098
cCIf any damage is found or the front
fork does not operate smoothly,
have a Yamaha dealer check or
repair it.
EAU00794
Checking the steeringWorn or loose steering bearings may
cause danger. Therefore, the opera-
tion of the steering must be checked
as follows at the intervals specified in
the periodic maintenance and lubrica-
tion chart.
1. Place a stand under the engine
to raise the front wheel off the
ground.
EW000115
wSecurely support the scooter so
that there is no danger of it falling
over.
2. Hold the lower ends of the front
fork legs and try to move them
forward and backward. If any
free play can be felt, have a
Yamaha dealer check or repair
the steering.
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EAU02990
Troubleshooting chartsStarting problems or poor engine performance
EW000125
wKeep 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.
Operate the electric starter.4. Battery
The engine turns over
quickly.
The engine turns over
slowly.DryWet
The engine does not start.
Check the battery.Open the throttle halfway and operate
the electric starter.
The battery is good.Check the battery lead connections,
and charge the battery if necessary.
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9 Engine overheating
EW000070
w8Do 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.
8After 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.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.
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.
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INDEX
F
Front and rear brake levers ...................6-25
Front and rear brake pads, checking.....6-26
Front fork, checking ...............................6-30
Fuel .........................................................3-9
Fuel consumption, tips for reducing ........5-3
Fuel gauge ..............................................3-4
Fuel tank cap ...........................................3-8
Fuses, replacing ....................................6-34
H
Handlebar switches .................................3-6
Pass switch ...........................................3-6
Dimmer switch ......................................3-6
Turn signal switch .................................3-6
Horn switch ...........................................3-6
Engine stop switch ................................3-7
Start switch ...........................................3-7
Headlight bulb, replacing .......................6-35
Helmet holder ........................................3-11
I
Identification numbers .............................9-1
Ignition circuit cut-off system .................3-13
Indicator lights .........................................3-2
Turn signal indicator lights ....................3-3
High beam indicator light ......................3-3
Oil change indicator light ......................3-2
V-belt replacement indicator light .........3-3
K
Key identification number ........................9-1
M
Main switch/steering lock ........................3-1
Model label ..............................................9-2
P
Parking ....................................................5-4
Part locations...........................................2-1
Periodic maintenance and lubrication
chart ......................................................6-3
Pre-operation check list ...........................4-1
R
Rider backrest, adjusting .......................3-10
S
Safe-riding points ....................................1-2
Seat .........................................................3-9
Sidestand ..............................................3-12
Self-diagnosis device ..............................3-6
Spark plugs, checking .............................6-9
Specifications ..........................................8-1
Speedometer unit ....................................3-3
Starting the engine ..................................5-1
Starting off ...............................................5-2
Steering, checking .................................6-31
Storage ....................................................7-4
Storage compartments ..........................3-12
T
Throttle cable free play, adjusting .........6-22
Throttle grip and cable, checking and
lubricating ...........................................6-29
Tires ......................................................6-23
A
Acceleration and deceleration .................5-2
Air filter element, cleaning .....................6-19
Anti-theft alarm (optional) ........................3-5
B
Battery ...................................................6-32
Brake fluid level, checking .....................6-27
Brake fluid, changing .............................6-28
Brake lever (front)....................................3-7
Brake lever (rear) ....................................3-8
Brake levers, lubricating ........................6-28
Braking ....................................................5-3
C
Carburetors, adjusting ...........................6-21
Care.........................................................7-1
Centerstand and sidestand, checking
and lubricating ....................................6-30
Chain drive oil........................................6-16
Clock .......................................................3-5
Conversion table .....................................8-5
Coolant ..................................................6-17
Coolant temperature gauge.....................3-4
Cowlings and panels, removing and
installing ................................................6-6
E
Engine break-in .......................................5-4
Engine idling speed ...............................6-21
Engine oil and oil filter cartridge ............6-12
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