Record the frame number, engine number (Primary ID),
and key number in the spaces provided for assistance
when ordering spare parts from a Yamaha dealer.
1
The
frame number
is the seventeen-digit number
stamped on the frame of the snowmobile. (See
fig.È.)
2
The
engine number
is stamped in the location as
shown. (See fig. É.)
3
Key number
(See fig. Ê.)
Also, record and keep the ID numbers in a separate
place in case the snowmobile is stolen.
ESU00011
2-
INTRODUCTION
Congratulations on your purchase of a Yamaha snowmobile. This model is the result of Yamaha’s vast experience
in the production of fine sporting and touring snowmobiles. It represents the high degree of craftsmanship and
reliability that have made Yamaha a leader in these
fields.
This manual will give you an understanding of the operation, inspection, and basic maintenance of this snowmobile. If you have any questions concerning the operation
or maintenance of your snowmobile, please consult a
Yamaha dealer.
To maintain the high quality and performance of this
snowmobile, it is important that you and your Yamaha
dealer pay close attention to the recommended maintenance schedules and operating instructions contained
within this manual.
PLEASE READ AND UNDERSTAND THIS MANUAL
COMPLETELY BEFORE OPERATING THE SNOWMOBILE.
@
NOTE:
@
●
Yamaha continually seeks advancements in product
design and quality. Therefore, while this manual contains the most current product information available
at the time of printing, there may be minor discrepancies between your snowmobile and this manual. If
there is any question concerning this manual, please
consult a Yamaha dealer.
●
This manual should be considered a permanent part
of this snowmobile and should remain with the snowmobile when resold.
@
Particularly important information is distinguished in this
manual by the following notations.
The Safety Alert Symbol means ATTENTION! BECOME
ALERT! YOUR SAFETY IS INVOLVED!
WARNING
@
Failure to follow WARNING instructions could result in
severe injury or death to the snowmobile operator, a
bystander, or a person inspecting or repairing the snowmobile.
CAUTION
@
:
A CAUTION indicates special precautions that must be
taken to avoid damage to the snowmobile.
NOTE:
@
A NOTE provides key information to make procedures
easier or clearer.
ESU00003
CONTENTS
YAMAHA MOTOR
CORPORATION, U.S.A.
SNOWMOBILE LIMITED
WARRANTY
YAMAHA EXTENDED SERVICE
(Y.E.S.)
LOCATION OF THE
IMPORTANT LABELS
SAFETY INFORMATION
DESCRIPTION
CONTROL FUNCTIONS
Main switch......................................5-1
Please read the following labels carefully before operating this snowmobile.
NOTE:
Maintain or replace safety and instruction labels, as necessary.
1
VT70
2-1
2
4 SXV70M
5 SXV70M
3
6 SXV70M
2-2
ESU00090
3-
SAFETY INFORMATION
When you ride your snowmobile, you must know and use
the following for your safety. Severe injury or death may
result if you ignore any of the following.
Before operating
1. Read the Owner’s Manual and all labels before oper-
ating this snowmobile. Become familiar with all of the
operating controls and their function. Consult a
Yamaha dealer about any control or function you do
not understand.
2. This snowmobile was not manufactured for use on
public streets, roads, or highways. Such use is prohibited by law, and you could collide with another
vehicle.
3. SXV70ER, SXV70M and SXV70S are designed to
carry the OPERATOR ONLY.
Passengers are prohibited. Carrying a passenger
can cause loss of control.
4. Do not operate the snowmobile after drinking alcohol
or taking drugs. Your ability to operate the snowmobile is reduced by the influence of alcohol or drugs.
5. For safety and proper care of the snowmobile, always
perform the pre-operation checks on pages 6-1–6-9
before starting the engine. Check the throttle, brake,
and steering for proper operation every time before
starting the engine. Make sure that the throttle lever
moves freely and it returns to the home position when
it is released.
6. Apply the parking brake before starting the engine.
Never drive the snowmobile with the parking brake
applied. This may overheat the brake disc and reduce
braking ability.
3-1
7. Do not allow anyone to stand behind the snowmobile
when starting, inspecting, or adjusting the snowmobile. A broken track, track fittings, or debris thrown by
the track could be dangerous to the operator or
bystanders.
8. Handle fuel with care; it is HIGHLY FLAMMABLE.
Never add fuel when the engine is running or hot.
●
Allow the engine to cool for several minutes after
running.
Use an approved fuel container.
●
Fill the fuel tank outdoors with extreme care.
●
Never remove the fuel cap indoors. Never fill the
fuel tank indoors.
Never refuel while smoking or in the vicinity of an
●
open flame.
Make sure that the fuel tank cap is closed securely
●
after refueling. Wipe up any spilled fuel immediately.
9. If you swallow some gasoline, inhale a lot of gasoline
vapor, or get some gasoline into your eyes, see your
doctor immediately. If any gasoline spills on your skin
or clothing, immediately wash your skin with soap
and water, and change your clothes.
10. Wear protective clothing. Wear an approved helmet,
and a face shield or goggles. Also, wear a good quality snowmobile suit, boots, and a pair of gloves or mittens that will permit use of your thumbs and fingers
for operation of the controls.
Operation
1. Do not run the engine indoors, except when starting
the engine to transport the snowmobile in or out of
the building. Open the outside doors; exhaust fumes
are dangerous.
2. Be careful where you ride. There may be obstacles
hidden beneath the snow. Stay on established trails
to minimize your exposure to hazards. Ride slowly
and cautiously when you ride off of established trails.
Hitting a rock or stump, or running into wires could
cause an accident and injury.
3-2
3. This snowmobile is not designed for use on surfaces
other than snow or ice. Use on dirt, sand, grass,
rocks, or bare pavement may cause loss of control
and may damage the snowmobile.
4. Avoid operating on glare ice, or on snow which has a
lot of dirt or sand mixed in. Operation under such
conditions will damage or result in rapid wear of ski
runners, drive track, slide runners, and drive sprockets.
5. Always ride with other snowmobilers when going on a
ride. You may need help if you run out of fuel, have an
accident, or damage your snowmobile.
6. Many surfaces such as ice and hard-packed snow
require much longer stopping distances. Be alert,
plan ahead and begin decelerating early. The best
braking method on most surfaces is to release the
throttle and apply the brake gently—not suddenly.
Maintenance and storage
1. Do not leave the snowmobile on its left side for an
extended period of time. Fuel may leak out from the
fuel breather hose.
2. Modifications made to the snowmobile not approved
by Yamaha, or the removal of original equipment may
render your snowmobile unsafe for use that may
cause severe personal injury. Modifications may also
make the snowmobile illegal to use.
3. Never store the snowmobile with fuel in the fuel tank
inside a building where ignition sources are present
such as hot water and space heaters, an open flame,
sparks, clothes dryers, and the like. Allow the engine
to cool off before storing the snowmobile in an
enclosed space.
4. Always refer to the “STORAGE” section if the snow-
mobile is to be stored for an extended period.
5. Maintain or replace safety and instruction labels, as
necessary.
3-3
ESU00012
4-
DESCRIPTION
Windshield
1
Steering handlebar
2
Seat
3
Passenger grip warmer switch (VT70)
4
Frame
5
Slide rail suspension
6
Drive track
7
Skis
8
Headlight
9
Shroud
0
SXV70ER/SXV70S
SXV70M
VT70
4-1
VT70
Storage compartment
A
Tail/brake light
B
Snow flap
C
Side mirror (VT70)
D
Brake lever
E
Parking brake lever
F
Grip warmer adjustment switch
G
Headlight beam switch
H
Strap (SXV70M)
I
Engine stop switch
J
Thumb warmer adjustment switch
K
Throttle lever
L
Shift lever (SXV70ER/VT70)
M
Starter handle
N
Shroud latch
O
Main switch
P
Starter lever
Q
Tachometer
R
“D.C. S.” (Detonation Control System)
S
indicator light
High beam indicator light
T
Warning light
U
Self-diagnosis warning indicator
V
Coolant temperature warning indicator
W
Fuel level warning indicator
X
Oil level warning indicator
Y
Speedometer
Z
Grip warmer indicator
[
Select/reset button
\
Thumb warmer indicator
]
Fuel meter and grip/thumb warmer heat
_
level indicator
Odometer/tripmeter
a
4-2
ESU00013
5-
CONTROL FUNCTIONS
ESU00256
Main switch
The main switch controls the following items.
“OFF”
1
The ignition circuit is switched off.
The key can be removed only in this position.
“ON”
A
2
The ignition circuit is switched on.
The engine can be started.
NOTE:
@
The headlight, meter lights, and taillight will come on
after the engine starts.
@
B
For SXV70ER/VT70
“START”
3
The starting circuit is switched on.
The starter motor starts.
CAUTION
@
:
Release the switch immediately after the engine
starts.
@
SXV70M/SXV70S
È
SXV70ER/VT70
É
5-1
ESU00020
Starter lever (choke)
Use the starter lever (choke) when starting and warming
up a cold engine.
Starter lever (choke)
1
When starting a cold engine.
2
Warming up
3
When the engine is warm.
4
NOTE:
@
Refer the “Starting the engine” section for proper operation.
@
ESU00022
Throttle lever
Once the engine is running cleanly, squeezing a the throttle lever 1 will increase the engine speed and cause
engagement of the drive system. Regulate the speed of
the snowmobile by varying the throttle position. Because
the throttle is spring-loaded, the snowmobile will decelerate, and the engine will return to idle when it is released b.
WARNING
@
Check the throttle, brake, and steering for proper
operation before starting the engine.
@
ESU00023
Throttle override system (T.O.R.S.)
If the carburetor or throttle cable should malfunction during operation, the T.O.R.S. will operate when the throttle
lever is released.
The T.O.R.S. is designed to interrupt the ignition and
keep the engine revolution speed between 2,800 and
3,000 r/min if the carburetor fails to return to idle when
the lever is released.
5-2
WARNING
@
If the T.O.R.S. is activated, make sure that the
●
cause of the malfunction has been corrected and
that the engine can be operated without a problem before restarting the engine.
Be sure to use the specified spark plug and spark
●
plug cap. Otherwise, the T.O.R.S. will not work
A
properly.
@
CA-01E
Switch
Mode
A
starting
Idle
or
BC
RunTrouble
Throttle switchOffOnOff
Carburetor switchOnOffOff
B
EngineRunRun
Idle or starting
È
Run
É
Tr o u b l e
Ê
Carburetor switch
1
Throttle switch
C
2
Throttle cable
3
Throttle valve
4
On
a
Off
b
T.O.R.S.
will operate
5-3
ESU03810
Speedometer unit
The speedometer unit is equipped with the following:
a digital speedometer (which shows riding speed)
●
an odometer (which shows the total distance trav-
●
eled)
a tripmeter (which shows the distance traveled since
●
it was last set to zero)
warning indicators (which show self-diagnosis, cool-
●
ant temperature, fuel level, and oil level warnings)
a “D.C. S.” (Detonation Control System) indicator light
●
(which shows occurrences of abnormal combustion)
a fuel meter (which shows the fuel remaining in the
●
fuel tank)
a grip/thumb warmer heat level indicator (which
●
shows the heat level of the grip warmer or the thumb
warmer)
After the engine is started, the tachometer 1 makes one
sweep, the warning light 2 and all segments of the
meter 3 turn on and off once, and the “D.C . S.” indicator
light 4 flashes three times, and then goes off if there are
no problems.
The grip warmer heat level is initially displayed for 5 seconds, then switches to the fuel meter display.
Odometer and tripmeter modes
Pushing the select/reset button 5 switches the display
between the odometer mode “ODO” and the tripmeter
mode “TRIP”.
To reset the tripmeter, push the select/reset button for at
least one second while the tripmeter is displayed.
NOTE:
@
To switch the speedometer, odometer, and tripmeter displays between kilometers and miles, select the odometer
mode “ODO”, and then push the select/reset button
5
for at least 10 seconds while the snowmobile is stopped.
@
5-4
ESU03630
High beam indicator light
The high beam indicator light 1 comes on when the high
beams of the headlights are switched on. (See page
5-14 for headlight beam switch operation.)
ESU03820
Fuel meter and grip/thumb warmer heat level
indicator
The fuel meter and grip/thumb warmer heat level indicator have eight segments 1 which show the amount of
fuel remaining in the fuel tank, the heat level of the grip
warmer, or the heat level of the thumb warmer.
Fuel meter
As the fuel level decreases in the fuel tank, the segments
disappear until the level goes down to the last segment
“E” (Empty). When this occurs, the fuel level warning
indicator 2 and the warning light 3 come on.
If the fuel level warning indicator and the warning light
come on, fill the fuel tank at the first opportunity.
NOTE:
@
The snowmobile must be stopped on a level surface to
obtain an accurate fuel meter reading. The fuel meter
reading changes as the snowmobile moves and depending on the inclination of the snowmobile.
@
Grip/thumb warmer heat level indicator
The grip warmer adjustment switch 1 and the thumb
warmer adjustment switch 2 control the electrically
heated handlebar grips and throttle lever.
To raise the temperature, press each switch to “HI”. To
lower the temperature, press each switch to “LO”.
5-5
NOTE:
@
The grip warmer indicator 3 comes on and the dis-
●
play switches to the grip warmer heat level when the
grip warmer adjustment switch is pressed.
The thumb warmer indicator 4 comes on and the
●
display switches to the thumb warmer heat level
when the thumb warmer adjustment switch is
pressed.
The grip/thumb warmer heat level is displayed for
●
5 seconds after releasing the grip/thumb warmer
adjustment switch, then switches to the fuel meter.
The top segment of the heat level indicator flashes
●
once if the grip/thumb warmer adjustment switches
are continually pressed at the maximum level. The
bottom segment of the heat level indicator flashes
once if the grip/thumb warmer adjustment switches
are continually pressed at the minimum level.
When the engine is started, the grip/thumb heat lev-
●
els are set to the levels saved when the engine was
stopped.
@
ESU00287
Fuel level warning indicator
The fuel level warning indicator indicates a malfunctioning sensor, disconnected coupler, broken lead, or short
circuit when detected by the self-diagnosis device of the
snowmobile.
The fuel level warning indicator 1, warning light 2, and
all segments of the fuel meter 3 warn the rider of the
above problems by flashing continuously. (See the table
below for warning indicator, warning light and fuel meter
segment flash pattern.)
When this occurs, have a Yamaha dealer inspect the
snowmobile as soon as possible.
CA-08E
Warning indicator, warning light, and fuel meter segments of the fuel meter flash pattern
12 8
0.5 s3 s
0.5 s
· · ·
Warning indicator, warning light, and fuel meter
segment flash continuously in this pattern.
: On: Offs: Second
5-6
ESU00288
Oil level warning indicator
If the oil level falls below the minimum level, the oil level
warning indicator 1 and the warning light 2 come on.
If the oil level warning indicator and the warning light
come on, add engine oil to the oil tank at the first opportunity.
ESU00289
Coolant temperature warning indicator
If the engine overheats, the coolant temperature warning
indicator 1 and the warning light 2 come on. When this
occurs, stop the engine immediately and allow the
engine to cool down, and then check the coolant level in
the coolant reservoir. (See page 6-2.)
Warning indicator and warning light flash pattern
12 8
0.5 s3 s
0.5 s
: On: Offs: Second
CAUTION
@
:
Do not operate the engine if it overheats.
@
The coolant temperature warning indicator indicates a
malfunctioning sensor, disconnected coupler, broken
lead, or short circuit when detected by the self-diagnosis
device of the snowmobile.
The coolant temperature warning indicator and warning
light warn the rider of the above problems by flashing
continuously. (See the table below for warning indicator
and warning light flash pattern.)
When this occurs, have a Yamaha dealer inspect the
snowmobile as soon as possible.
CA-09E
· · ·
Warning indicator and warning light flash
continuously in this pattern.
5-7
ESU03830
Self-diagnosis warning indicator
The self-diagnosis warning indicator indicates a malfunctioning sensor, disconnected coupler, broken lead, etc.,
when detected by the self-diagnosis device of the snowmobile.
The self-diagnosis warning indicator 1 and warning
light2 warn the rider of the above problems by flashing
continuously. If necessary, ask a Yamaha dealer for further details. (See page 5-9 for warning indicator and
warning light flash patterns.)
WARNING
@
●
If the self-diagnosis warning indicator and warning light flash continuously during operation,
there may be some problem with the electrical
circuit, lead couplers, etc. (See page 5-9 for warning indicator and warning light flash pattern numbers 1–8.)
●
Stop the engine and allow it to cool off. Then,
check that the wire harness couplers are connected properly in the engine compartment.
●
If the self-diagnosis warning indicator and warning light flash after the engine has been started,
note the flash pattern, and then have a Yamaha
dealer inspect the snowmobile as soon as possible.
@
5-8
3.5 s
4.5 s
5.5 s
6.5 s
7.5 s
CA-15E
· · ·
· · ·
· · ·
· · ·
· · ·
· · ·
Warning indicator and warning
light flash continuously in this
pattern.
Warning indicator and warning
light flash continuously in this
pattern.
Warning indicator and warning
light flash continuously in this
pattern.
Warning indicator and warning
light flash continuously in this
pattern.
Warning indicator and warning
light flash continuously in this
pattern.
Warning indicator and warning
light flash continuously in this
pattern.
Warning indicator and warning
· · ·
light flash continuously in this
pattern.
Warning indicator and warning
· · ·
light flash continuously in this
pattern.
No.Self-diagnosis warning indicator and warning light flash patterns
1
2
3
4
5
6
7
8
0.25 s
0.25 s
0.75 s
2.5 s
0.75 s
0.25 s
0.75 s
0.25 s
0.75 s
0.25 s
0.75 s
0.25 s
0.75 s
0.25 s
0.75 s
0.25 s
4 s
5 s
: On: Offs: Second
5-9
ESU03840
“D.C.S.” (Detonation Control System) indicator
light
This snowmobile is equipped with a system which is able
to detect and control engine detonations in order to protect the engine from damage.
The “D. C.S. ” indicator light 1 flashes to inform the rider
that the detonation control system has been activated.
If a detonation is detected by the knock sensor, the system automatically adjusts the ignition timing for optimal
firing, and the “D.C.S. ” indicator light flashes. The system
helps protect the engine from detonation damage while
the light is flashing. (See page 5-11 for “D.C. S.” indicator
light flash pattern numbers 1 and 2.)
NOTE:
@
If the detonation level increases, the “D.C.S.” indica-
●
tor light flash pattern changes from pattern number 1
to pattern number 2. If excessive detonation levels
continue, maximum engine speed is reduced to protect the engine.
Engine performance will decline according to the det-
●
onation level.
@
After detonation stops, the engine protection control is
deactivated, and the “D.C. S.” indicator light goes off.
NOTE:
@
If the carburetor settings are not appropriate for the
●
operating conditions, detonations may occur.
If the “D.C.S.” indicator light flashes continuously, it is
●
recommended to consult a Yamaha dealer.
@
5-10
· · ·
CA-16E
Light flashes continuously in this
pattern.
No.“D.C.S.” indicator light flash patterns
1
0.5 s
0.5 s
2
0.2 s
0.2 s
· · ·
: On: Offs: Second
Light flashes continuously in this
pattern.
5-11
ESU00031
Engine stop switch
The engine stop switch 1 is used to stop the engine in
an emergency. Simply push 2 the stop switch to stop the
engine. To start the engine, pull 3 the stop switch and
proceed with starting the engine. (See page 7-1 for more
details.)
During the first few rides, practice using the stop switch
so that you can react quickly in an emergency.
ESU00241
Brake lever
The snowmobile is stopped by braking the entire drive
system.
Squeeze the brake lever towards the handlebar grip to
stop the snowmobile.
Brake lever
1
Brake lever end
2
Handlebar end
3
NOTE:
@
When the brake lever is operated, the brake light will illuminate.
@
CAUTION
@
:
Make sure that the brake lever end does not project
out over the handlebar end. This will help prevent
brake lever damage when the snowmobile is placed
on its side for service.
For SXV70ER/SXV70S/VT70
The brake lever is equipped with a position adjuster.
To adjust the brake lever position:
1. Loosen the locknut 1.
2. While lightly pushing the brake lever in direction a,
finger tighten the adjusting bolt 2 to set the brake
lever to the desired position.
3. Tighten the locknut securely after adjusting the brake
lever.
5-12
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