YAMAHA NIKEN 2018 Service Manual

Instrument and control functions
3-26
3
EAU80200
Fuel tank overflow hoseBefore operating the vehicle:
 Check the fuel tank overflow hose
connection.
 Check the fuel tank overflow hose
for cracks or damage, and replace
it if necessary.
 Make sure that the end of the fuel
tank overflow hose is not blocked,
and clean it if necessary.
 Make sure that the end of the fuel
tank overflow hose is positioned
as shown.
TIPSee page 6-11 for canister information.
EAU13434
Catalytic converterThis model is equipped with a catalytic
converter in the exhaust system.
WARNING
EWA10863
The exhaust system is hot after op-
eration. To prevent a fire hazar d or
b urns:
 Do not park the vehicle near
possi ble fire hazar ds such as
g rass or other materials that
easily burn.
 Park the vehicle in a place
where pe destrians or chil dren
are not likely to touch the hot
exhaust system.
 Make sure that the exhaust sys-
tem has coole d down before
d oin g any maintenance work.
 Do not allow the en gine to i dle
more than a few minutes. Lon g
i d lin g can cause a b uild-up of
heat.
1. Fuel tank overflow hose
2. Guide
3. Paint mark
321
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Instrument and control functions
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NOTICE
ECA10702
Use only unlea ded g asoline. The use
of lead ed g asoline will cause unre-
pairab le damag e to the catalytic
converter.
EAU84580
SeatsPassen ger seat
To remove the passenger seat1. Open the seat lock cover, insert the key into the seat lock, and then
turn the key counterclockwise.
2. Lift the rear of the passenger seat and pull it backward. To install the passenger seat
1. Insert the projection on the front of
the passenger seat into the seat
holder as shown, and then push
the rear of the seat down to lock it
in place.
2. Remove the key.
Ri der seat
To remove the rider seat1. Remove the passenger seat, and then remove the hexagon wrench
located on the bottom of the seat.
1. Seat lock cover
2. Seat lock
3. Unlock.
3
2
1
1. Projection
2. Seat holder1
2
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Instrument and control functions
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3
2. Remove the bolts with the hexa- gon wrench.
3. Lift the rear of the rider seat and pull it backward. To install the rider seat
1. Insert the projection on the front of
the rider seat into the seat holder
as shown, and then place the seat
in the original position.
2. Install the bolts with the hexagon wrench.
3. Insert the hexagon wrench back into its holder on the passenger
seat.
4. Install the passenger seat.TIPMake sure that the seats are properly
secured before riding.
EAU84590
Helmet hol din g ca bleA helmet holding cable is provided to
allow you to secure helmet(s) to the ve-
hicle.
To secure a helmet with the helmetholding cable1. Remove the passenger seat.
2. Remove the storage pouch and
cable.
1. Hexagon wrench
1. Bolt
1
1
1. Projection
2. Seat holder
2
1
1. Helmet holding cable
2. Passenger seat
3. Projection
4. Helmet strap buckle
1
4 2
3
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Instrument and control functions
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3
3. Pass the helmet holding cablethrough the buckle on the helmet
strap.
4. Loop the ends of the helmet hold- ing cable around the projection on
the passenger seat.
5. Install the passenger seat. WARNING! Never ri de with a
helmet attached to the helmet
hol der, since the helmet may hit
o bjects, causin g loss of control
an d possi bly an acci dent.
[EWA10162] EAU14465
Stora
ge compartmentThe storage compartment is located
under the passenger seat. (See page
3-27.)
When storing documents or other
items in the storage compartment, be
sure to wrap them in a plastic bag so
that they will not get wet. When wash-
ing the vehicle, be careful not to let any
water enter the storage compartment.
WARNING
EWA10962
 Do not exceed the load limit of
1.5 k g (3 l b) for the stora ge com-
partment. 
Do not exceed the maximum
loa d of 195 k g (430 l b) for the ve-
hicle.
1. Storage pouch
1
1. Storage compartment
1
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Instrument and control functions
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3
EAU39672
Rear view mirrorsThe rear view mirrors of this vehicle
can be folded forward or backward for
parking in narrow spaces. Fold the mir-
rors back to their original position be-
fore riding.
WARNING
EWA14372
Be sure to fol d the rear view mirrors
b ack to their ori ginal position before
ri din g.
EAU84600
A djustin g the front fork
WARNING
EWA10181
Always a djust both fork le gs equally,
otherwise poor han dlin g an d loss of
sta bility may result.Each side of the front fork is equipped
with a rebound damping force adjust-
ing screw and compression damping
force adjusting screw.
 When adjusting the damping force
settings, turn the adjuster in direc-
tion (a) until it stops, and then
count the clicks in direction (b).
 When turning a damping force ad-
juster in direction (a), the stop po-
sition and the 1 click position may
be the same.
 Although a damping force adjust-
er may click beyond the stated
minimum settings, such adjust-
ments are ineffective and may
damage the suspension.
NOTICE
ECA10102
To avoi d d amag ing the mechanism,
d o not attempt to turn beyon d the
maximum or minimum settin gs.Re boun d d ampin g force
To increase the rebound damping
force and thereby harden the rebound
damping, turn the adjusting screw on
each side of the front fork in direction
(a). To decrease the rebound damping
force and thereby soften the rebound
damping, turn the adjusting screw on
each side of the front fork in direction
(b).
1. Riding position
2. Parking position
2
1
2
1
2
1. Rebound damping force adjusting screw
1(a)
(b)
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Instrument and control functions
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3
Compression dampin g force
To increase the compression damping
force and thereby harden the com-
pression damping, turn the adjusting
screw on each side of the front fork in
direction (a). To decrease the com-
pression damping force and thereby
soften the compression damping, turn
the adjusting screw on each side of the
front fork in direction (b).
EAU84610
A djustin g the shock a bsorb er
assem blyThis shock absorber assembly is
equipped with a spring preload adjust-
ing knob and a rebound damping force
adjusting screw.NOTICE
ECA10102
To avoi d d amag ing the mechanism,
d o not attempt to turn b eyond the
maximum or minimum settin gs.Sprin g preloa d
To increase the spring preload and
thereby harden the suspension, turn
the adjusting knob in direction (a). To
decrease the spring preload and there-
by soften the suspension, turn the ad-
justing knob in direction (b).
Re boun d d ampin g setting :
Minimum (soft):
17 click(s) in direction (b)
Standard:
13 click(s) in direction (b)
Maximum (hard): 1 click(s) in direction (b)1. Compression damping force adjusting
screw
(b)
(a)
1
Compression dampin g settin g:
Minimum (soft):
13 click(s) in direction (b)
Standard:
8 click(s) in direction (b)
Maximum (hard): 1 click(s) in direction (b)
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Instrument and control functions
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TIPWhen adjusting the spring preload set-
ting, turn the adjuster in direction (b)
until it stops, and then count the clicks
in direction (a).Re boun d d ampin g force
To increase the rebound damping
force and thereby harden the rebound
damping, turn the adjusting screw in direction (a). To decrease the rebound
damping force and thereby soften the
rebound damping, turn the adjusting
screw in direction (b).
TIP
When adjusting the damping force
settings, turn the adjuster in direc-
tion (a) until it stops, and then
count the number of turns in direc-
tion (b). 
Although a damping force adjust-
er may turn beyond the stated
minimum settings, such adjust-
ments are ineffective and may
damage the suspension.
WARNING
EWA10222
This shock a bsor ber assem bly con-
tains hig hly pressurize d nitro gen
g as. Rea d an d un derstan d the fol-
lowin g information before han dlin g
the shock a bsor ber assem bly.
 Do not tamper with or attempt
to open the cylind er assembly.
 Do not su bject the shock a b-
sor ber assem bly to an open
flame or other hi gh heat source.
This may cause the unit to ex-
plo de due to excessive gas
pressure.
 Do not deform or damag e the
cylin der in any way. Cylin der
d ama ge will result in poor
d ampin g performance.
1. Spring preload adjusting knobSprin g preloa d settin g:
Minimum (soft): 0 click(s) in direction (a)
Standard: 1 click(s) in direction (a)
Maximum (hard):
24 click(s) in direction (a)
(a)
(b)
1
1. Rebound damping force adjusting screw
Re boun d d ampin g settin g:
Minimum (soft): 2 4/5 turn(s) in direction (b)
Standard: 1 1/4 turn(s) in direction (b)
Maximum (hard):
0 turn(s) in direction (b)
(a)
(b)
1
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Instrument and control functions
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3 
Do not dispose of a damag ed or
worn-out shock a bsor ber as-
sem bly yourself. Take the shock
a b sor ber assem bly to a Yamaha
d ealer for any service.
EAU49454
Auxiliary DC jackA 12-V accessory connected to the
auxiliary DC jack can be used when the
main switch is on.NOTICE
ECA15432
The accessory connecte d to the
auxiliary DC jack shoul d not b e used
with the en gine turne d off, an d the
loa d must never exceed 12 W (1.0 A),
otherwise the fuse may blow or the
b attery may d ischarge.To use the auxiliary DC jack
1. Turn the main switch off.
2. Remove the auxiliary DC jack cap.
3. Turn the accessory off. 4. Insert the accessory plug into the
auxiliary DC jack.
5. Turn the main switch on, and start the engine. (See page 5-1.)
6. Turn the accessory on.
WARNING
EWA14361
To prevent electrical shock or short-
circuitin g, make sure that the cap is
installe d when the auxiliary DC jack
is not bein g use d.
1. Auxiliary DC jack cap
1
1. Auxiliary DC jack
1
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Instrument and control functions
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EAU70641
Auxiliary DC connectorThis vehicle is equipped with an auxil-
iary DC connector. Consult your
Yamaha dealer before installing any accessories.
EAU15306
Si destan dThe sidestand is located on the left
side of the frame. Raise the sidestand
or lower it with your foot while holding
the vehicle upright.TIPThe built-in sidestand switch is part of
the ignition circuit cut-off system,
which cuts the ignition in certain situa-
tions. (See the following section for an
explanation of the ignition circuit cut-
off system.)
WARNING
EWA10242
The vehicle must not b e ridden with
the si destan d d own, or if the si de-
stan d cannot b e properly move d up
(or does not stay up), otherwise the
si destan d coul d contact the groun d
an d d istract the operator, resultin g
in a possib le loss of control.
Yamaha’s ig nition circuit cut-off
system has been desi gne d to assist
the operator in fulfillin g the respon-
si bility of raisin g the si destan d b e-
fore startin g off. Therefore, check this system re
gularly an d have a
Yamaha dealer repair it if it does not
function properly.
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Instrument and control functions
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EAU57952
Ig nition circuit cut-off systemThis system prevents in-gear engine
starts unless the clutch lever is pulled
and the sidestand is up. Also, it will
stop the running engine should the
sidestand be lowered while the trans-
mission is in gear.
Periodically check this system via the
following procedure.TIP This check is most reliable if per-
formed with a warmed-up engine.
 See pages 3-2 and 3-3 for switch
operation information.
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