2004 YAMAHA XVS650A check engine

PERIODIC MAINTENANCE AND MINOR REPAIR
6-12
6
NOTE:If dust or water collects in the air filter
check hose, remove the clamp from it,
and then remove the plug to drain thehose.
EAU21290
Adjusting the carburetors The carburetors are important parts of
the engine and require very sophisticat-
ed adjustment. Therefore, most carbu-
retor adjustments should be left to a
Yamaha dealer, who has the neces-
sary professional knowledge and expe-
rience. The adjustment described in the
following section, however, may be ser-
viced by the owner as part of routine
maintenance.CAUTION:
ECA10560
The 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.
EAU21340
Adjusting the engine idling
speed The engine idling speed must be
checked and, if necessary, adjusted as
follows at the intervals specified in the
periodic maintenance and lubrication
chart.
The engine should be warm before
making this adjustment.NOTE:

The engine is warm when it quickly
responds to the throttle.


A diagnostic tachometer is neededto make this adjustment.
1. Attach the tachometer to the spark
plug lead.
2. Check the engine idling speed
and, if necessary, adjust it to spec-
ification by turning the throttle stop
screw. To increase the engine
idling speed, turn the screw in di-
rection (a). To decrease the en-
gine idling speed, turn the screw in
direction (b).
1. Air filter check hose
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-13
6
NOTE:
If the specified idling speed cannot be
obtained as described above, have aYamaha dealer make the adjustment.
EAU21380
Adjusting the throttle cable
free play The throttle cable free play should mea-
sure 4.0–6.0 mm (0.16–0.24 in) at the
throttle grip. Periodically check the
throttle cable free play and, if neces-
sary, have a Yamaha dealer adjust it.
EAU21400
Adjusting the valve clearance The valve clearance changes with use,
resulting in improper air-fuel mixture
and/or engine noise. To prevent this
from occurring, the valve clearance
must be adjusted by a Yamaha dealer
at the intervals specified in the periodic
maintenance and lubrication chart.
1. Throttle stop screwEngine idling speed:
1150–1250 r/min
1. Throttle cable free play
U5SCE1E0.book Page 13 Monday, September 8, 2003 11:32 AM

PERIODIC MAINTENANCE AND MINOR REPAIR
6-21
6
EAU22720
Changing the brake fluid Have a Yamaha dealer change the
brake fluid at the intervals specified in
the NOTE after the periodic mainte-
nance and lubrication chart. In addition,
have the oil seals of the brake master
cylinder and caliper as well as the
brake hose replaced at the intervals
listed below or whenever they are dam-
aged or leaking.

Oil seals: Replace every two
years.


Brake hose: Replace every four
years.
EAU23100
Checking and lubricating the
cables The operation of all control cables and
the condition of the cables should be
checked before each ride, and the ca-
bles and cable ends should be lubricat-
ed if necessary. If a cable is damaged
or does not move smoothly, have a
Yamaha dealer check or replace it.
WARNING
EWA10720
Damage to the outer sheath may in-
terfere with proper cable operation
and will cause the inner cable to
rust. Replace a damaged cable as
soon as possible to prevent unsafeconditions.
EAU23110
Checking and lubricating the
throttle grip and cable The operation of the throttle grip should
be checked before each ride. In addi-
tion, the cable should be lubricated or
replaced at the intervals specified in the
periodic maintenance chart.
Recommended lubricant:
Engine oil
U5SCE1E0.book Page 21 Monday, September 8, 2003 11:32 AM

PERIODIC MAINTENANCE AND MINOR REPAIR
6-24
6
CAUTION:
ECA10590
If any damage is found or the front
fork does not operate smoothly,
have a Yamaha dealer check or re-pair it.
EAU23280
Checking the steering Worn or loose steering bearings may
cause danger. Therefore, the operation
of the steering must be checked as fol-
lows at the intervals specified in the pe-
riodic maintenance and lubrication
chart.
1. Place a stand under the engine to
raise the front wheel off the
ground.
WARNING
EWA10750
Securely support the vehicle so thatthere is no danger of it falling over.
2. Hold the lower ends of the front
fork legs and try to move them for-
ward and backward. If any free
play can be felt, have a Yamaha
dealer check or repair the steering.
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PERIODIC MAINTENANCE AND MINOR REPAIR
6-30
6 3. Remove the defective bulb by
pushing it in and turning it counter-
clockwise.
4. Insert a new bulb into the socket,
push it in, and then turn it clock-
wise until it stops.
5. Install the socket (together with the
bulb) by pushing it in and turning it
clockwise until it stops.
6. Install the headlight unit by install-
ing the screws.
EAU24350
Supporting the motorcycle Since this model is not equipped with a
centerstand, follow these precautions
when removing the front and rear
wheel or performing other maintenance
requiring the motorcycle to stand up-
right. Check that the motorcycle is in a
stable and level position before starting
any maintenance. A strong wooden
box can be placed under the engine for
added stability.
To service the front wheel
1. Stabilize the rear of the motorcycle
by using a motorcycle stand or, if
an additional motorcycle stand is
not available, by placing a jack un-
der the frame in front of the rear
wheel.
2. Raise the front wheel off the
ground by using a motorcycle
stand.
To service the rear wheel
Raise the rear wheel off the ground by
using a motorcycle stand or, if a motor-
cycle stand is not available, by placinga jack either under each side of the
frame in front of the rear wheel or under
each side of the swingarm.
1. Auxiliary light bulb socket
U5SCE1E0.book Page 30 Monday, September 8, 2003 11:32 AM

PERIODIC MAINTENANCE AND MINOR REPAIR
6-35
6
EAU25891
Troubleshooting chart
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.
U5SCE1E0.book Page 35 Monday, September 8, 2003 11:32 AM

MOTORCYCLE CARE AND STORAGE
7-4
7
WARNING
EWA10950
To prevent damage or injury from
sparking, make sure to ground the
spark plug electrodes while turningthe engine over.
6. Lubricate all control cables and the
pivoting points of all levers and
pedals as well as of the side-
stand/centerstand.
7. Check and, if necessary, correct
the tire air pressure, and then lift
the motorcycle 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.
8. Cover the muffler outlets with plas-
tic bags to prevent moisture from
entering them.
9. 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 morethan 30 °C (90 °F)]. For more in-
formation on storing the battery,
see page 6-25.
NOTE:Make any necessary repairs beforestoring the motorcycle.
U5SCE1E0.book Page 4 Monday, September 8, 2003 11:32 AM

INDEXAAir filter element, cleaning..................... 6-11
Anti-theft alarm (optional)........................ 3-5
Auxiliary light bulb, replacing ................ 6-29BBattery................................................... 6-25
Brake and clutch levers, checking and
lubricating ........................................... 6-22
Brake and shift pedals, checking and
lubricating ........................................... 6-22
Brake fluid, changing ............................ 6-21
Brake fluid level, checking .................... 6-20
Brake lever .............................................. 3-7
Brake lever free play, adjusting............. 6-17
Brake pads and shoes, checking .......... 6-19
Brake pedal ............................................. 3-8
Brake pedal position and free play,
adjusting ............................................. 6-18CCables, checking and lubricating .......... 6-21
Carburetors, adjusting........................... 6-12
Care ........................................................ 7-1
Catalytic converter ................................ 3-10
Clutch lever ............................................. 3-7
Clutch lever free play, adjusting ............ 6-16DDimmer switch ........................................ 3-6EEngine break-in ....................................... 5-4
Engine idling speed............................... 6-12
Engine oil and oil filter element ............... 6-7
Engine, starting a warm .......................... 5-2
Engine stop switch .................................. 3-6
Engine trouble warning light.................... 3-4
FFinal gear oil ......................................... 6-10
Front fork, checking .............................. 6-23
Fuel......................................................... 3-9
Fuel cock .............................................. 3-10
Fuel consumption, tips for reducing........ 5-3
Fuel tank cap .......................................... 3-8
Fuses, replacing ................................... 6-26HHandlebar switches ................................ 3-5
Hazard switch ......................................... 3-6
Headlight bulb, replacing ...................... 6-27
Helmet holder ....................................... 3-12
High beam indicator light ........................ 3-4
Horn switch ............................................. 3-6IIdentification numbers ............................ 9-1
Ignition circuit cut-off system ................ 3-15
Immobilizer system ................................. 3-1
Immobilizer system indicator light........... 3-4
Indicator and warning lights .................... 3-3KKey identification number ....................... 9-1LLuggage strap holders .......................... 3-14MMain switch/steering lock........................ 3-2
Model label ............................................. 9-2NNeutral indicator light .............................. 3-3PPanels, removing and installing .............. 6-5
Parking ................................................... 5-4
Part locations .......................................... 2-1Pass switch ............................................. 3-6
Periodic maintenance and lubrication
chart ...................................................... 6-2
Pre-operation check list........................... 4-2
RRear brake light switch, adjusting ......... 6-19SSafety information ................................... 1-1
Seats ..................................................... 3-11
Shifting .................................................... 5-2
Shift pedal ............................................... 3-7
Shock absorber assembly, adjusting .... 3-13
Sidestand .............................................. 3-15
Sidestand, checking and lubricating...... 6-23
Spark plugs, checking ............................. 6-6
Specifications .......................................... 8-1
Speedometer unit .................................... 3-5
Starter (choke) knob.............................. 3-11
Starting a cold engine ............................. 5-1
Start switch.............................................. 3-6
Steering, checking................................. 6-24
Storage.................................................... 7-3
Storage compartment............................ 3-13
Supporting the motorcycle .................... 6-30TThrottle cable free play, adjusting ......... 6-13
Throttle grip and cable, checking and
lubricating ........................................... 6-21
Tires ...................................................... 6-14
Tool kit..................................................... 6-1
Troubleshooting .................................... 6-34
Troubleshooting chart ........................... 6-35
Turn signal indicator light ........................ 3-3
U5SCE1E0.book Page 1 Monday, September 8, 2003 11:32 AM