Yamaha SXV70ERJ User manual

PRINTED ON RECYCLED PAPER PRINTED IN JAPAN
2003.04-0.8×1 CR
(E)
YAMAHA MOTOR CO., LTD.
OWNER’S MANUAL
SNOWMOBILE
SXV70ERJ
SXV70MJ
SXV70SJ
VT70J
8EK-28199-12
LIT-12628-02-31

ESU00286
1-
MACHINE IDENTIFICATION
Identification number records
A. FRAME NUMBER:
CZ-01E
B. ENGINE NUMBER (PRIMARY ID):
CZ-01E
C. KEY NUMBER:
CZ-01E
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.
1The frame number is the seventeen-digit number
stamped on the frame of the snowmobile. (See
fig. È.)
2The engine number is stamped in the location as
shown. (See fig. É.)
3Key number (See fig. Ê.)
Also, record and keep the ID numbers in a separate
place in case the snowmobile is stolen.
A
B
C
U8EK12.book Page 1 Sunday, March 30, 2003 7:20 PM

ESU00011
2-
INTRODUCTION
Congratulations on your purchase of a Yamaha snowmo-
bile. This model is the result of Yamaha’s vast experience
in the production of fine sporting and touring snowmo-
biles. 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 opera-
tion, inspection, and basic maintenance of this snowmo-
bile. 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 mainte-
nance schedules and operating instructions contained
within this manual.
SXV70ERJ
SXV70MJ
SXV70SJ
VT70J
OWNER’S MANUAL
©2003 by Yamaha Motor Corporation, U.S.A.
1st Edition, March 2003
All rights reserved.
Any reprinting or unauthorized use
without the written permission of
Yamaha Motor Corporation, U.S.A.
is expressly prohibited.
Printed in Japan
P/N LIT-12628-02-31
U8EK12.book Page 1 Sunday, March 30, 2003 7:20 PM

WARNING
@
PLEASE READ AND UNDERSTAND THIS MANUAL
COMPLETELY BEFORE OPERATING THE SNOWMO-
BILE.
@
NOTE:
@
●Yamaha continually seeks advancements in product
design and quality. Therefore, while this manual con-
tains the most current product information available
at the time of printing, there may be minor discrepan-
cies 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 snow-
mobile 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 snow-
mobile.
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.
U8EK12.book Page 2 Sunday, March 30, 2003 7:20 PM

ESU00003
CONTENTS
YAMAHA MOTOR
CORPORATION, U.S.A.
SNOWMOBILE LIMITED
WARRANTY .......................................1-1
YAMAHA EXTENDED SERVICE
(Y.E.S.) ...............................................1-4
LOCATION OF THE
IMPORTANT LABELS .......................2-1
SAFETY INFORMATION ...................3-1
DESCRIPTION ...................................4-1
CONTROL FUNCTIONS ....................5-1
Main switch......................................5-1
Starter lever (choke) ........................5-2
Throttle lever....................................5-2
Throttle override system
(T.O.R.S.) ........................................5-2
Speedometer unit ............................5-4
High beam indicator light .................5-5
Fuel meter and grip/thumb warmer
heat level indicator...........................5-5
Fuel level warning indicator .............5-6
Oil level warning indicator................5-7
Coolant temperature warning
indicator ...........................................5-7
Self-diagnosis warning indicator......5-8
“D.C.S.”(Detonation Control
System) indicator light ...................5-10
Engine stop switch.........................5-12
Brake lever ....................................5-12
Parking brake lever........................5-13
Shift lever.......................................5-13
Headlight beam switch ..................5-14
Passenger grip warmer switch ......5-14
Shroud latches...............................5-15
Drive guard ....................................5-15
V-belt holders ................................5-16
Spark plug holders ........................5-16
Carburetor heating knob................5-16
Backrest ........................................5-17
Storage compartment....................5-17
PRE-OPERATION CHECKS..............6-1
Fuel .................................................6-1
Engine oil.........................................6-2
Coolant ............................................6-2
Throttle lever ...................................6-3
Recoil starter ...................................6-3
Throttle override system
(T.O.R.S.) ........................................6-3
Brake ...............................................6-4
Brake fluid leakage..........................6-5
V-belt ...............................................6-5
Drive guard......................................6-5
Drive track .......................................6-6
51-mm (2.0-in) high-profile
pattern drive track............................6-6
Slide runners ...................................6-6
Skis and ski runners ........................6-7
Steering system...............................6-7
Lights...............................................6-7
Battery .............................................6-8
Air filter ............................................6-8
Fittings and fasteners ......................6-9
Tool kit and recommended
equipment........................................6-9
OPERATION ......................................7-1
Starting the engine ..........................7-1
Emergency engine starting..............7-2
Break-in ...........................................7-4
Riding your snowmobile ..................7-5
Getting to know your snowmobile ...7-5
Learning to ride your snowmobile ...7-5
To start out and accelerate..............7-5
Braking ............................................7-5
Turning ............................................7-6
Riding uphill.....................................7-6
Riding downhill ................................7-7
U8EK12.book Page 1 Sunday, March 30, 2003 7:20 PM

Traversing a slope ...........................7-7
Ice or icy surface .............................7-7
Hard-packed snow...........................7-8
Operation on surfaces other than
snow or ice ......................................7-8
Maximizing drive track life ...............7-9
Strap ..............................................7-10
Driving ...........................................7-11
Stopping the engine.......................7-12
Transporting ..................................7-13
PERIODIC MAINTENANCE ...............8-1
Periodic maintenance chart .............8-1
Tool kit .............................................8-4
Spark plug inspection ......................8-4
Engine idle speed adjustment .........8-5
Throttle cable adjustment ................8-6
Oil pump cable adjustment ..............8-6
Carburetor adjustment.....................8-7
Yamaha Power Valve System
(Y.P.V.S.).........................................8-9
High altitude adjustments ..............8-10
Cooling system ..............................8-11
V-belt replacement ........................8-13
Checking the oil level of the drive
chain housing ................................8-15
Checking the brake pads...............8-17
Checking the parking brake
pads...............................................8-17
Checking the brake fluid level........8-18
Brake fluid replacement.................8-18
Suspension....................................8-18
Drive track adjustment...................8-26
Ski alignment .................................8-28
Lubrication .....................................8-29
Headlight bulb replacement...........8-30
Headlight beam adjustment...........8-30
Battery ...........................................8-31
Fuse replacement..........................8-32
TROUBLESHOOTING .......................9-1
STORAGE ........................................10-1
SPECIFICATIONS............................11-1
Dimensions....................................11-1
Engine ...........................................11-1
Chassis..........................................11-2
Electric...........................................11-3
WIRING DIAGRAM ..........................12-1
U8EK12.book Page 2 Sunday, March 30, 2003 7:20 PM

1-1
ESU00004
1-
YAMAHA MOTOR CORPORATION, U.S.A.
SNOWMOBILE LIMITED WARRANTY
CW-01E
U8EK12.book Page 1 Sunday, March 30, 2003 7:20 PM

1-2
CW-02E
U8EK12.book Page 2 Sunday, March 30, 2003 7:20 PM

1-3
CW-03E
U8EK12.book Page 3 Sunday, March 30, 2003 7:20 PM

1-4
ESU00050
YAMAHA EXTENDED SERVICE (Y.E.S.)
CW-05E
U8EK12.book Page 4 Sunday, March 30, 2003 7:20 PM

2-1
ESU00007
2-
LOCATION OF THE
IMPORTANT LABELS
Please read the following labels carefully before operat-
ing this snowmobile.
NOTE:
Maintain or replace safety and instruction labels, as nec-
essary.
1SXV70M/SXV70S
1SXV70ER
1VT70
U8EK12.book Page 1 Sunday, March 30, 2003 7:20 PM

2-2
23
4SXV70M
5SXV70M
6SXV70M
U8EK12.book Page 2 Sunday, March 30, 2003 7:20 PM

3-1
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 pro-
hibited 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 snowmo-
bile 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.
U8EK12.book Page 1 Sunday, March 30, 2003 7:20 PM

3-2
7. Do not allow anyone to stand behind the snowmobile
when starting, inspecting, or adjusting the snowmo-
bile. 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 immedi-
ately.
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 qual-
ity snowmobile suit, boots, and a pair of gloves or mit-
tens 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.
U8EK12.book Page 2 Sunday, March 30, 2003 7:20 PM

3-3
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 sprock-
ets.
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.
U8EK12.book Page 3 Sunday, March 30, 2003 7:20 PM

4-1
ESU00012
4-
DESCRIPTION
1Windshield
2Steering handlebar
3Seat
4Passenger grip warmer switch (VT70)
5Frame
6Slide rail suspension
7Drive track
8Skis
9Headlight
0Shroud
SXV70ER/SXV70S
SXV70M
VT70
U8EK12.book Page 1 Sunday, March 30, 2003 7:20 PM

4-2
AStorage compartment
BTail/brake light
CSnow flap
DSide mirror (VT70)
EBrake lever
FParking brake lever
GGrip warmer adjustment switch
HHeadlight beam switch
IStrap (SXV70M)
JEngine stop switch
KThumb warmer adjustment switch
LThrottle lever
MShift lever (SXV70ER/VT70)
NStarter handle
OShroud latch
PMain switch
QStarter lever
RTachometer
S“D.C.S.”(Detonation Control System)
indicator light
THigh beam indicator light
UWarning light
VSelf-diagnosis warning indicator
WCoolant temperature warning indicator
XFuel level warning indicator
YOil level warning indicator
ZSpeedometer
[Grip warmer indicator
\Select/reset button
]Thumb warmer indicator
_Fuel meter and grip/thumb warmer heat
level indicator
aOdometer/tripmeter
VT70
U8EK12.book Page 2 Sunday, March 30, 2003 7:20 PM

5-1
ESU00013
5-
CONTROL FUNCTIONS
ESU00256
Main switch
The main switch controls the following items.
1“OFF”
The ignition circuit is switched off.
The key can be removed only in this position.
2“ON”
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.
@
For SXV70ER/VT70
3“START”
The starting circuit is switched on.
The starter motor starts.
CAUTION:
@
Release the switch immediately after the engine
starts.
@
ÈSXV70M/SXV70S
ÉSXV70ER/VT70
A
B
U8EK12.book Page 1 Sunday, March 30, 2003 7:20 PM

5-2
ESU00020
Starter lever (choke)
Use the starter lever (choke) when starting and warming
up a cold engine.
1Starter lever (choke)
2When starting a cold engine.
3Warming up
4When the engine is warm.
NOTE:
@
Refer the “Starting the engine”section for proper opera-
tion.
@
ESU00022
Throttle lever
Once the engine is running cleanly, squeezing athe throt-
tle lever 1will 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 deceler-
ate, 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 dur-
ing 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.
U8EK12.book Page 2 Sunday, March 30, 2003 7:20 PM