2017 YAMAHA SCR950 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 .................................... 3-8
Shift pedal ...................................... 3-9
Brake lever...................................... 3-9
Brake pedal .................................... 3-9
ABS .............................................. 3-10
Fuel tank cap ................................ 3-11
Fuel ............................................... 3-11
Fuel tank breather/overflow hose .......................................... 3-13
Catalytic converter ....................... 3-13
Steering lock................................. 3-14
Adjusting the shock absorber assemblies ................................ 3-15
Sidestand ..................................... 3-16
Ignition circuit cut-off system ....... 3-16 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 kit ............................... 6-2
Periodic maintenance chart for the emission control system .............. 6-3
General maintenance and lubrication chart ........................... 6-5
Removing and installing panels ...... 6-9
Checking the spark plugs ............. 6-11
Canister ......................................... 6-12
Engine oil and oil filter cartridge.... 6-12
Replacing the air filter element ..... 6-15
Checking the throttle grip free play ............................................ 6-16
Valve clearance ............................. 6-16
Tires .............................................. 6-16
Spoke wheels................................ 6-18
Adjusting the clutch lever free play ............................................ 6-19 Checking the brake lever free
play ............................................ 6-19
Brake light switches ..................... 6-20
Checking the front and rear brake pads .......................................... 6-20
Checking the brake fluid level ...... 6-21
Changing the brake fluid .............. 6-22
Drive belt slack ............................. 6-23
Checking and lubricating the cables ........................................ 6-23
Checking and lubricating the
throttle grip and cable ............... 6-24
Checking and lubricating the brake and shift pedals............... 6-24
Checking and lubricating the brake and clutch levers ............. 6-25
Checking and lubricating the
sidestand................................... 6-25
Checking the front fork ................. 6-26
Checking the steering................... 6-26
Checking the wheel bearings ....... 6-27
Battery .......................................... 6-27
Replacing the fuses ...................... 6-28
Replacing the headlight bulb ........ 6-30
Replacing the auxiliary light bulb .......................................... 6-31
Brake/tail light............................... 6-32
Replacing a turn signal light bulb ........................................... 6-32
Replacing the license plate light bulb ........................................... 6-33UBL3E0E0.book Page 1 Tuesday, November 15, 2016 2:38 PM

Periodic maintenance an d a djustment
6-11
6
EAU19643
Checkin g the spark plu gsThe spark plugs are important engine
components, which should be
checked periodically, preferably by a
Yamaha dealer. Since heat and depos- its will cause any spark plug to slowly
erode, they should be removed and
checked in accordance with the peri-
odic maintenance and lubrication
chart. In addition, the condition of the
spark plugs can reveal the condition of
the engine.
The porcelain insulator around the
center electrode of each spark plug
should be a medium-to-light tan (the
ideal color when the vehicle is ridden
normally), and all spark plugs installed
in the engine should have the same
color. If any spark plug shows a dis-
tinctly different color, the engine could
be operating improperly. Do not at-
tempt to diagnose such problems
yourself. Instead, have a Yamaha deal-
er check the vehicle.
If a spark plug shows signs of elec-
trode erosion and excessive carbon or
other deposits, it should be replaced. Before installing a spark plug, the
spark plug gap should be measured
with a wire thickness gauge and, if
necessary, adjusted to specification.
Clean the surface of the spark plug
gasket and its mating surface, and
then wipe off any grime from the spark
plug threads.
TIPIf 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.
Specifie
d spark plu g:
NGK/CPR7EA-91. Spark plug gapSpark plu g g ap:
0.8–0.9 mm (0.031–0.035 in)
Ti ghtenin g torque:
Spark plug: 13 N·m (1.3 kgf·m, 9.4 lb·ft)
UBL3E0E0.book Page 11 Tuesday, November 15, 2016 2:38 PM

Periodic maintenance an d a djustment
6-35
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.
UBL3E0E0.book Page 35 Tuesday, November 15, 2016 2:38 PM

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 d am-
a g e or injury from sparkin g,
make sure to groun d the
spark plu g electro des while
turnin g 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
6-27.
TIPMake any necessary repairs before
storing the motorcycle.
UBL3E0E0.book Page 4 Tuesday, November 15, 2016 2:38 PM

10-1
10
IndexAABS ....................................................... 3-10
ABS warning light ................................... 3-4
Air filter element, replacing ................... 6-15
Auxiliary light bulb, replacing ................ 6-31BBattery .................................................. 6-27
Brake and clutch levers, checking and
lubricating ........................................... 6-25
Brake and shift pedals, checking and lubricating ........................................... 6-24
Brake fluid, changing ............................ 6-22
Brake fluid level, checking .................... 6-21
Brake lever .............................................. 3-9
Brake lever free play, checking............. 6-19
Brake light switches.............................. 6-20
Brake pedal............................................. 3-9
Brake/tail light ....................................... 6-32CCables, checking and lubricating ......... 6-23
Canister................................................. 6-12
Care ........................................................ 7-1
Catalytic converter ................................ 3-13
Clutch lever ............................................. 3-8
Clutch lever free play, adjusting ........... 6-19DData recording, vehicle ........................... 9-2
Diagnostic connector.............................. 9-2
Dimmer switch ........................................ 3-7
Drive belt slack ..................................... 6-23EEngine break-in....................................... 5-3
Engine oil and oil filter cartridge ........... 6-12
Engine serial number .............................. 9-1 Engine trouble warning light ................... 3-4
FFront and rear brake pads, checking ... 6-20
Front fork, checking ............................. 6-26
Fuel ....................................................... 3-11
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 ..................... 6-30
High beam indicator light ....................... 3-3
Horn switch ............................................ 3-8IIdentification numbers ............................ 9-1
Ignition circuit cut-off system ............... 3-16
Immobilizer system ................................ 3-1
Immobilizer system indicator light .......... 3-5
Indicator lights and warning lights ......... 3-3LLicense plate light bulb, replacing........ 6-33MMain 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 ........................ 3-5NNeutral indicator light ............................. 3-3
OOil level warning light ..............................3-3PPanels, removing and installing ..............6-9
Parking ....................................................5-4
Part locations ..........................................2-1
Pass switch .............................................3-7SSafety information ...................................1-1
SELECT switch .......................................3-8
Shifting ....................................................5-2
Shift pedal ...............................................3-9
Shock absorber assemblies, adjusting .............................................3-15
Sidestand ..............................................3-16
Sidestand, checking and lubricating.....6-25
Spark plugs, checking ..........................6-11
Specifications .........................................8-1
Start/Engine stop switch .........................3-8
Starting the engine ..................................5-1
Steering, checking ................................6-26
Steering lock .........................................3-14
Storage ...................................................7-3
Supporting the motorcycle ...................6-33TThrottle grip and cable, checking and lubricating ...........................................6-24
Throttle grip free play, checking ...........6-16
Tires ......................................................6-16
Tool kit ....................................................6-2
Troubleshooting ....................................6-34
Troubleshooting chart ...........................6-35
Turn signal indicator light........................3-3
Turn signal light bulb, replacing ............6-32
UBL3E0E0.book Page 1 Tuesday, November 15, 2016 2:38 PM