2017 YAMAHA XVS950CU spark plugs

Table of contentsSafety information ............................ 1-1
Description ....................................... 2-1
Left view ......................................... 2-1
Right view ....................................... 2-2
Controls and instruments ............... 2-3
Instrument an d control functions ... 3-1
Immobilizer system......................... 3-1
Main switch .................................... 3-2
Indicator lights and warning lights............................................ 3-3
Multi-function meter unit ................ 3-5
Handlebar switches ........................ 3-7
Clutch lever .................................... 3-9
Shift pedal ...................................... 3-9
Brake lever...................................... 3-9
Brake pedal .................................. 3-10
ABS .............................................. 3-10
Fuel tank cap ................................ 3-11
Fuel ............................................... 3-12
Fuel tank breather/overflow hose .......................................... 3-13
Catalytic converter ....................... 3-14
Steering lock................................. 3-14
Rider seat ..................................... 3-15
Adjusting the shock absorber assemblies ................................ 3-16
Sidestand ..................................... 3-17
Ignition circuit cut-off system ....... 3-18 For your safety – pre-operation
checks
............................................... 4-1
Operation an d important ri din g
points ................................................. 5-1
Starting the engine .......................... 5-1
Shifting ............................................ 5-2
Tips for reducing fuel consumption ................................ 5-3
Engine break-in ............................... 5-3
Parking ............................................ 5-4
Perio dic maintenance an d
a d justment ........................................ 6-1
Owner’s tool kits ............................. 6-2
Periodic maintenance chart for the emission control system .............. 6-3
General maintenance and lubrication chart ........................... 6-5
Removing and installing the
panel ............................................ 6-9
Checking the spark plugs ............... 6-9
Canister ......................................... 6-11
Engine oil and oil filter cartridge.... 6-11
Replacing the air filter element ..... 6-14
Checking the throttle grip free play ............................................ 6-15
Valve clearance ............................. 6-15
Tires .............................................. 6-16
Cast wheels................................... 6-17 Adjusting the clutch lever free
play ............................................ 6-18
Checking the brake lever free play ............................................ 6-19
Brake light switches ..................... 6-19
Checking the front and rear
brake pads ................................ 6-20
Checking the brake fluid level ...... 6-20
Changing the brake fluid .............. 6-22
Drive belt slack ............................. 6-22
Checking and lubricating the
cables ........................................ 6-23
Checking and lubricating the throttle grip and cable ............... 6-23
Checking and lubricating the brake and shift pedals............... 6-23
Checking and lubricating the
brake and clutch levers ............. 6-24
Checking and lubricating the sidestand................................... 6-25
Checking the front fork ................. 6-25
Checking the steering................... 6-26
Checking the wheel bearings ....... 6-26
Battery .......................................... 6-26
Replacing the fuses ...................... 6-28
Replacing the headlight bulb ........ 6-29
Replacing the auxiliary light bulb .......................................... 6-30
Brake/tail light............................... 6-31
Replacing a turn signal light
bulb ........................................... 6-31UBS5E0E0.book Page 1 Wednesday, October 19, 2016 10:21 AM

Periodic maintenance an d a djustment
6-9
6
EAU18752
Removin g an d installin g the
panelThe 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.
EAU54942
Panel A
To remove the panel1. Slide the panel lock cover open,
insert the key into the lock, and
then turn it 1/4 turn clockwise. 2. Pull the panel off as shown.
To install the panel
1. Place the panel in the original po- sition.
2. Turn the key 1/4 turn counter- clockwise, remove it, and then
slide the panel lock cover closed.
EAU42433
Checkin g the spark plu gsThe 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 main-
tenance and lubrication chart. In addi-
tion, the condition of the spark plugs
can reveal the condition of the engine.
To remove a spark plu g
1. Remove the appropriate spark plug cover (rear right or front left)
by removing the bolts.
1. Panel A
1
1. Panel lock cover
2. Unlock.
1 2
1. Spark plug cover
2. Bolt
1
2
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Periodic maintenance an d a djustment
6-10
6
2. Remove the spark plug cap.
3. Remove the spark plug as shown,
with the spark plug wrench includ-
ed in the additional tool kit, which
was handed out separately at the
purchase of the vehicle. To check the spark plu
gs
1. Check that the porcelain insulator around the center electrode on
each spark plug is a medium-to-
light tan (the ideal color when the
vehicle is ridden normally).
2. Check that all spark plugs in- stalled in the engine have the
same color.
TIPIf any spark plug shows a distinctly dif-
ferent color, the engine could be oper-
ating improperly. Do not attempt to
diagnose such problems yourself. In-
stead, have a Yamaha dealer check
the vehicle.
3. Check each spark plug for elec-trode erosion and excessive car-
bon or other deposits, and replace
it if necessary.
4. Measure the spark plug gap with a wire thickness gauge and, if nec-
essary, adjust the gap to specifi-
cation.
1. Spark plug cover
2. Bolt
1. Spark plug cap
2
1
1
1. Spark plug wrench
1
Specified spark plu g:
NGK/CPR7EA-9
1. Spark plug gap
Spark plu g g ap:
0.8–0.9 mm (0.031–0.035 in)
UBS5E0E0.book Page 10 Wedne sday, October 19, 2016 10:21 AM

Periodic maintenance an d a djustment
6-34
6
EAU42604
Trou bleshootin g chart
Check the fuel level in
the fuel tank.1. Fuel
There is enough fuel.
There is no fuel.
Check the battery.
Supply fuel.
The engine does not start.
Check the battery.
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.
Operate the electric starter.4. Compression
There is compression.
There is no compression.
The engine does not start.
Have a Yamaha dealer check the vehicle.Have a Yamaha dealer check the vehicle.
The engine does not start.
Check the compression.
Operate the electric starter.2. Battery
The engine turns over
quickly.
The engine turns over
slowly.
The engine does not start.
Check the ignition.
The battery is good.Check the battery lead connections,
and have a Yamaha dealer charge
the battery if necessary.
DryWet
Operate the electric starter.
UBS5E0E0.book Page 34 Wedne sday, October 19, 2016 10:21 AM

Motorcycle care and stora ge
7-4
7
2. Fill up the fuel tank and add fuel
stabilizer (if available) to prevent
the fuel tank from rusting and the
fuel from deteriorating.
3. Perform the following steps to protect the cylinders, piston rings,
etc. from corrosion.a. Remove the spark plug caps and spark plugs.
b. Pour a teaspoonful of engine oil into each spark plug bore.
c. Install the spark plug caps onto the spark plugs, and then pla-
ce the spark plugs on the cylin-
der head so that the electrodes
are grounded. (This will limit
sparking during the next step.)
d. Turn the engine over several times with the starter. (This will
coat the cylinder walls with oil.)
WARNING! To prevent dam-
a g e or injury from sparkin g,
make sure to groun d the
spark plu g electro des while
turning the en gine over.
[EWA10952]
e. Remove the spark plug caps
from the spark plugs, and then
install the spark plugs and the
spark plug caps.
4. Lubricate all control cables and the pivoting points of all levers and
pedals as well as of the side-
stand/centerstand.
5. 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.
6. Cover the muffler outlet with a plastic bag to prevent moisture
from entering it.
7. Remove the battery and fully char- ge it. Store it in a cool, dry place
and charge it once a month. Do
not store the battery in an exces-
sively cold or warm place [less
than 0 °C (30°F) or more than 30
°C (90°F)]. For more information
on storing the battery, see page
6-26.
TIPMake any necessary repairs before
storing the motorcycle.
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10-1
10
Index
AABS....................................................... 3-10
ABS warning light ................................... 3-4
Air filter element, replacing ................... 6-14
Auxiliary light bulb, replacing ............... 6-30BBattery .................................................. 6-26
Brake and clutch levers, checking and
lubricating........................................... 6-24
Brake and shift pedals, checking and lubricating........................................... 6-23
Brake fluid, changing............................ 6-22
Brake fluid level, checking.................... 6-20
Brake lever.............................................. 3-9
Brake lever free play, checking ............ 6-19
Brake light switches ............................. 6-19
Brake pedal .......................................... 3-10
Brake/tail light....................................... 6-31CCables, checking and lubricating ......... 6-23
Canister ................................................ 6-11
Care ........................................................ 7-1
Catalytic converter ............................... 3-14
Clutch lever............................................. 3-9
Clutch lever free play, adjusting ........... 6-18DData recording, vehicle........................... 9-2
Diagnostic connector ............................. 9-2
Dimmer switch........................................ 3-7
Drive belt slack ..................................... 6-22EEngine break-in ...................................... 5-3
Engine oil and oil filter cartridge ........... 6-11
Engine serial number .............................. 9-1 Engine stop switch................................. 3-8
Engine trouble warning light .................. 3-4
FFront and rear brake pads, checking ... 6-20
Front fork, checking ............................. 6-25
Fuel ...................................................... 3-12
Fuel consumption, tips for reducing ...... 5-3
Fuel level warning light........................... 3-4
Fuel tank breather/overflow hose ........ 3-13
Fuel tank cap........................................ 3-11
Fuses, replacing ................................... 6-28HHandlebar switches ............................... 3-7
Hazard switch ........................................ 3-8
Headlight bulb, replacing ..................... 6-29
High beam indicator light ....................... 3-3
Horn switch ............................................ 3-8IIdentification numbers ........................... 9-1
Ignition circuit cut-off system .............. 3-18
Immobilizer system ................................ 3-1
Immobilizer system indicator light ......... 3-5
Indicator lights and warning lights ......... 3-3LLicense plate light ................................ 6-32MMain switch ............................................ 3-2
Maintenance and lubrication, periodic... 6-5
Maintenance, emission control
system ................................................. 6-3
Matte color, caution ............................... 7-1
Model label............................................. 9-1
Multi-function meter unit ........................ 3-5
NNeutral indicator light ............................. 3-3OOil level warning light .............................. 3-3PPanel, removing and installing ................ 6-9
Parking.................................................... 5-4
Part locations.......................................... 2-1
Pass switch............................................. 3-7RRESET switch ......................................... 3-8
Rider seat.............................................. 3-15SSafety information................................... 1-1
SELECT switch ....................................... 3-8
Shifting.................................................... 5-2
Shift pedal............................................... 3-9
Shock absorber assemblies, adjusting ............................................. 3-16
Sidestand.............................................. 3-17
Sidestand, checking and lubricating .... 6-25
Spark plugs, checking ............................ 6-9
Specifications ......................................... 8-1
Starting the engine ................................. 5-1
Start switch ............................................. 3-8
Steering, checking ................................ 6-26
Steering lock ......................................... 3-14
Storage ................................................... 7-3
Supporting the motorcycle ................... 6-32TThrottle grip and cable, checking and lubricating ........................................... 6-23
Throttle grip free play, checking ........... 6-15
Tires ...................................................... 6-16
UBS5E0E0.book Page 1 Wednesday, October 19, 2016 10:21 AM