2021 YAMAHA TRACER 900 spark plugs

Table of contentsSafety information ............................ 1-1
Description ....................................... 2-1
Left view ......................................... 2-1
Right view ....................................... 2-2
Controls and instruments ............... 2-3
Special features .............................. 3-1
Cruise control system..................... 3-1
“D-MODE” ...................................... 3-3
“TCS-MODE”.................................. 3-4
QSS (if equipped) ........................... 3-6
BC................................................... 3-6
Instrument an d control functions ... 4-1
Immobilizer system......................... 4-1
Main switch/steering lock............... 4-2
Handlebar switches ........................ 4-3
Indicator lights and warning lights............................................ 4-6
Displays .......................................... 4-9
Settings MENU ............................. 4-17
Clutch lever .................................. 4-21
Shift pedal .................................... 4-21
Brake lever.................................... 4-22
Brake pedal .................................. 4-22
Brake control system (BC)............ 4-22
Fuel tank cap ................................ 4-24
Fuel ............................................... 4-24
Fuel tank overflow hose ............... 4-26
Catalytic converter ....................... 4-27 Seats ............................................. 4-27
Adjusting the rider seat height ...... 4-28
Rider footrest position .................. 4-31
Storage compartment ................... 4-31
Windshield ................................... 4-31
Handlebar position ....................... 4-32
Adjusting the front fork ................. 4-32
Adjusting the shock absorber
assembly.................................... 4-34
Luggage strap holders .................. 4-35
Auxiliary DC jack ........................... 4-36
Auxiliary DC connectors ............... 4-36
Sidestand ...................................... 4-37
Ignition circuit cut-off system ....... 4-37
For your safety – pre-operation
checks ............................................... 5-1
Operation an d important ri din g
points ................................................. 6-1
Engine break-in ............................... 6-1
Starting the engine .......................... 6-2
Shifting ............................................ 6-3
Tips for reducing fuel consumption ................................ 6-4
Parking ............................................ 6-5
Perio dic maintenance an d
a d justment ........................................ 7-1
Tool kit ............................................ 7-2
Periodic maintenance charts .......... 7-3 Periodic maintenance chart for the
emission control system ............. 7-3
General maintenance and lubrication chart .......................... 7-5
Checking the spark plugs ............... 7-9
Canister ........................................ 7-10
Engine oil ...................................... 7-10
Why Yamalube.............................. 7-12
Coolant ......................................... 7-13
Air filter element ............................ 7-14
Checking the engine idling
speed ........................................ 7-14
Valve clearance............................. 7-15
Tires .............................................. 7-15
Cast wheels .................................. 7-17
Adjusting the clutch lever free play ............................................ 7-18
Checking the brake lever free play ............................................ 7-18
Brake light switches ..................... 7-19
Checking the front and rear brake
pads .......................................... 7-19
Checking the brake fluid level ...... 7-20
Changing the brake fluid .............. 7-21
Drive chain slack........................... 7-22
Cleaning and lubricating the drive
chain.......................................... 7-23
Checking and lubricating the cables ........................................ 7-24
Checking and lubricating the throttle grip ................................ 7-24UB5UE0E0.book Page 1 Wednesday, December 23, 2020 11:03 AM

Instrument and control functions
4-7
4
TIPWhen the vehicle is turned on, these
lights should come on for a few sec-
onds and then go off. Otherwise, have
a Yamaha dealer check the vehicle.
EAU91840
Malfunction ind icator light
(MIL) “ ”
This light comes on or flashes if a prob-
lem is detected in the engine or other
vehicle control system. If this occurs,
have a Yamaha dealer check the on-
board diagnostic system. The electri-
cal circuit of the warning light can be
checked by turning the vehicle power
on. The light should come on for a few
seconds, and then go off. If the light
does not come on initially when the ve-
hicle power is turned on, or if the light
remains on, have a Yamaha dealer
check the vehicle.NOTICE
ECA26820
If the MIL starts flashin g, re duce en-
g ine spee d to prevent exhaust sys-
tem damag e.
TIPThe engine is sensitively monitored by
the on-board diagnostic system to de-
tect deterioration or malfunction of the
emission control system. Therefore the
MIL may come on or flash due to vehi-
cle modifications, lack of maintenance,
or excessive/improper use of the mo-
torcycle. To prevent this, observe
these precautions.
 Do not attempt to modify the soft-
ware of the engine control unit.
 Do not add any electrical acces-
sories that interfere with engine
control.
 Do not use aftermarket accesso-
ries or parts such as suspension,
spark plugs, injectors, exhaust
system, etc.
 Do not change the drivetrain
specifications (chain, sprockets,
wheels, tires, etc.).
 Do not remove or alter the O2 sen-
sor, air induction system, or ex-
haust parts (catalysts or EXUP,
etc.).
 Maintain the drive chain properly.
 Maintain correct tire pressure. 
Maintain proper brake pedal
height to prevent rear brake from
dragging.
 Do not operate the vehicle in an
extreme manner. For example, re-
peated or excessive opening and
closing of the throttle, racing,
burnouts, wheelies, extended
half-clutch use, etc.
EAU92700
ABS warnin g lig ht “ ”
In normal operation, the ABS warning
light comes on when the vehicle is
turned on, and goes off after traveling
at a speed of 5 km/h (3 mi/h) or higher.TIPIf the warning light does not work as
described above, or if the warning light
comes on while riding, the ABS may
not work correctly. Have a Yamaha
dealer check the vehicle as soon as
possible.
UB5UE0E0.book Page 7 Wednesday, December 23, 2020 11:03 AM

Periodic maintenance an d a djustment
7-9
7
EAU19653
Checkin g the spark plugsThe 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.NOTICE
ECA10841
Do not use any tools to remove or in-
stall the spark plu
g cap, otherwise
the i gnition coil coupler may get
d amag ed . The spark plu g cap may
b e difficult to remove because the
ru bber seal on the en d of the cap fits
ti g htly. To remove the spark plu g
cap, simply twist it b ack and forth
while pullin g it out; to install it, twist
it back an d forth while pushin g it in.
Specified spark plu g:
NGK/LMAR9A-9
1. Spark plug gap
Spark 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, 9.6 lb·ft)
UB5UE0E0.book Page 9 Wednesday, December 23, 2020 11:03 AM

Index
11-2
11
Spark plugs, checking ............................ 7-9
Special features ...................................... 3-1
Specifications ......................................... 9-1
Stability control indicator light ................ 4-8
Starting the engine ................................. 6-2
Steering, checking ................................ 7-28
Stop/Run/Start switch ............................ 4-4
Storage ................................................... 8-3
Storage compartment .......................... 4-31
Swingarm pivots, lubricating ................ 7-27TTCS-MODE............................................. 3-4
Throttle grip, checking and
lubricating........................................... 7-24
Tires ...................................................... 7-15
Tool kit .................................................... 7-2
Troubleshooting.................................... 7-33
Troubleshooting chart .......................... 7-35
Turn signal indicator lights ..................... 4-6
Turn signal switch................................... 4-4VValve clearance .................................... 7-15
Vehicle identification number ............... 10-1
Vehicle lights ........................................ 7-32WWheel bearings, checking .................... 7-28
Wheels .................................................. 7-17
Windshield ............................................ 4-31YYamalube.............................................. 7-12
UB5UE0E0.book Page 2 Wednesday, December 23, 2020 11:03 AM