Page 37 of 104

Instrument and control functions
3-22
1
234
5
6
7
8
9
10
11
12
EAU51194
Fuel tank overflow hose and
breather hoseBefore operating the vehicle:
check each hose connection.
check each hose for damage. Re-
place if necessary.
confirm the end of each hose is not
blocked. Clean if necessary.
confirm that each hose is routed
through the clamp.
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 hazard or
burns:
Do not park the vehicle near
possible fire hazards such as
grass or other materials that
easily burn.
Park the vehicle in a place
where pedestrians or children
are not likely to touch the hot
exhaust system.
Make sure that the exhaust sys-
tem has cooled down before do-
ing any maintenance work.
Do not allow the engine to idle
more than a few minutes. Long
idling can cause a build-up ofheat.
NOTICE
ECA10702
Use only unleaded gasoline. The use
of leaded gasoline will cause unre- pairable damage to the catalytic
converter.
1. Fuel tank overflow hose
2. Canister breather hose
3. Clamp
1
32
UB90E2.book 22 ページ 2018年6月5日 火曜日 午後5時40分
Page 43 of 104
Instrument and control functions
3-28
1
234
5
6
7
8
9
10
11
12
Yamaha dealer repair it if it does not
function properly.
EAU44895
Ignition 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 sides-
tand be lowered while the transmission
is in gear.
Periodically check the system via the
following procedure.TIP
This check is most reliable if per-
formed with a warmed-up engine.
See pages 3-2 and 3-14 for switchoperation information.
UB90E2.book 28 ページ 2018年6月5日 火曜日 午後5時40分
Page 44 of 104

Instrument and control functions
3-29
1
23
4
5
6
7
8
9
10
11
12
With the engine turned off:
1. Move the sidestand down.
2. Set engine stop s witch to run position.
3. T urn m ain switch to on position.
4. Shift tr ansmission into neutr al.
5. Push the start switch.
Does the engine start?
With the engine still r unning:
6. Move the sidestand up.
7. Pull the clutch lever.
8. Shift tr ansmission into gear.
9. Move the sidestand down.
Does the engine stall?
After the engine has stalled:
10. Move the sidestand up.
11.
Pull the clutch lever.
12. Push the start switch.
Does the engine start?
The system is OK. The motorcycle can be ridden.
YES NO YES NO YES NO
The neutr al switch ma y not be working.
The motorcycle should not be ridden until
checked b y a Yamaha dealer.
The clutch s witch may not be working.
The motorcycle should not be ridden until
checked b y a Yamaha dealer.The sidestand s witch may not be working.
The motorcycle should not be ridden until
checked b y a Yamaha dealer.If a malfunction is found, have the vehicle
inspected before riding.
WARNING
UB90E2.book 29 ページ 2018年6月5日 火曜日 午後5時40分
Page 46 of 104

4-1
1
2
34
5
6
7
8
9
10
11
12
For your safety – pre-operation checks
EAU15599
Inspect your vehicle each time you use it to make sure the vehi cle is in safe operating condition. Always follow the inspection
and maintenance procedures and schedules described in the Owner’s Manual.
WARNING
EWA11152
Failure to inspect or maintain the vehicle properly increases the possibility of an accident or equipment damage.
Do not operate the vehicle if you find any problem. If a problem cannot be corrected by the procedures provided inthis manual, have the vehicle inspected by a Yamaha dealer.
Before using this vehicle, check the following points:
ITEM CHECKS PAGE
Fuel Check fuel level in fuel tank.
Refuel if necessary.
Check fuel line for leakage.
Check fuel tank breather hose and overflow hose for obstructions, cracks or
damage, and check hose connections. 3-20, 3-22
Engine oil Check oil level in engine.
If necessary, add recommended oil to specified level.
Check vehicle for oil leakage. 6-10
Coolant Check coolant level in reservoir.
If necessary, add recommended coolant to specified level.
Check cooling system for leakage. 6-13
Front brake Check operation.
If soft or spongy, have Yamaha dealer bleed hydraulic system.
Check brake pads for wear.
Replace if necessary.
Check fluid level in reservoir.
If necessary, add specified brake fluid to specified level.
Check hydraulic system for leakage. 6-20
UB90E2.book 1 ページ 2018年6月5日 火曜日 午後5時40分
Page 50 of 104

Operation and important riding points
5-2
1
2
3
45
6
7
8
9
10
11
12 a warning or indicator light remains
on, see page 3-4 for the correspond-
ing warning and indicator light cir-
cuit check.
The ABS warning light should
come on when the key is turned to
“ON”, and then go off after travel-
ing at a speed of 10 km/h (6 mi/h)
or higher.NOTICE
ECA17682
If the ABS warning light does not
come on and then go off as ex-
plained above, see page 3-4 for thewarning light circuit check.2. Shift the transmission into the neu- tral position. The neutral indicator
light should come on. If not, ask a
Yamaha dealer to check the elec-
trical circuit.
3. Start the engine by sliding the switch toward “ ”.
If the engine fails to start, release
the start/engine stop switch, wait a
few seconds, and then try again.
Each starting attempt should be as
short as possible to preserve the
battery. Do not crank the engine more than 10 seconds on any one
attempt.
NOTICE
ECA11043
For maximum engine life, never ac-
celerate hard when the engine iscold!
EAU16673
ShiftingShifting gears lets you control the
amount of engine power available for
starting off, accelerating, climbing hills,
etc.
The gear positions are shown in the il-
lustration.TIPTo shift the transmission into the neu-
tral position, press the shift pedal down
repeatedly until it reaches the end of itstravel, and then slightly raise it.1. Shift pedal
2. Neutral position
1
N
2 3 4
5 6
1
2
UB90E2.book 2 ページ 2018年6月5日 火曜日 午後5時40分
Page 52 of 104
Operation and important riding points
5-4
1
2
3
45
6
7
8
9
10
11
12 r/min.
1600 km (1000 mi) and beyond
The vehicle can now be operated nor-
mally.
NOTICE
ECA10311
Keep the engine speed out of
the tachometer red zone.
If any engine trouble should oc-
cur during the engine break-in
period, immediately have a
Yamaha dealer check the vehi-cle.
EAU17214
ParkingWhen parking, stop the engine, and
then remove the key from the main
switch.
WARNING
EWA10312
Since the engine and exhaust
system can become very hot,
park in a place where pedestri-
ans or children are not likely to
touch them and be burned.
Do not park on a slope or on soft
ground, otherwise the vehicle
may overturn, increasing the
risk of a fuel leak and fire.
Do not park near grass or other
flammable materials whichmight catch fire.
UB90E2.book 4 ページ 2018年6月5日 火曜日 午後5時40分
Page 55 of 104

Periodic maintenance and adjustment
6-3
1
2
3
4
567
8
9
10
11
12
EAU71031
TIP
The annual checks must be performed every year, except if a distance-based maintenance is performed in-
stead.
From 50000 km (30000 mi), repeat the maintenance intervals starting from 10000 km (6000 mi).
Items marked with an asterisk should be performed by a Yamaha dealer as they require special tools, data and technicalskills.
EAU71051
Periodic maintenance chart for the emission control systemNO. ITEM CHECK OR MAINTENANCE JOB ODOMETER READING
ANNUAL
CHECK
1000 km
(600 mi) 10000 km
(6000 mi) 20000 km
(12000 mi) 30000 km
(18000 mi) 40000 km
(24000 mi)
1 * Fuel line Check fuel hoses for cracks or
damage.
Replace if necessary.
2 * Spark plugs Check condition.
Adjust gap and clean.
Replace.
3 * Valve clearance Check and adjust. Every 40000 km (24000 mi)
4 * Fuel injection Check engine idle speed.
Check and adjust synchronization.
5 * Exhaust system Check for leakage.
Tighten if necessary.
Replace gaskets if necessary.
6* Evaporative
emission control
system Check control system for damage.
Replace if necessary.
UB90E2.book 3 ページ 2018年6月5日 火曜日 午後5時40分
Page 59 of 104
Periodic maintenance and adjustment
6-7
1
2
3
4
567
8
9
10
11
12
23 * Rear suspension
relay arm and
connecting arm
pivoting points Check operation.
24 Engine oil Change (warm engine before
draining).
Check oil level and vehicle for oil leakage.
25 Engine oil filter
cartridge Replace.
26 * Cooling system Check coolant level and vehicle
for coolant leakage.
Change. Every 3 years
27 * Front and rear brake
switches Check operation.
28 * Moving parts and
cables Lubricate.
29 * Throttle grip
housing and cable Check operation and free play.
Adjust the throttle cable free play
if necessary.
Lubricate the throttle grip housing and cable.
30 * Lights, signals and
switches Check operation.
Adjust headlight beam.
NO. ITEM CHECK OR MAINTENANCE JOB
ODOMETER READING
ANNUAL
CHECK
1000 km
(600 mi) 10000 km
(6000 mi) 20000 km
(12000 mi) 30000 km
(18000 mi) 40000 km
(24000 mi)
UB90E2.book 7 ページ 2018年6月5日 火曜日 午後5時40分