Eton Viper 150 User manual

READ THIS MANUAL CAREFULLY!
It contains important safety information.
The ATV should not be ridden by anyone under 16 years of age.
WARNING
VIPER 150
VIPER 150

Read this manual carefully before operating this vehicle. This manual should stay with
this vehicle if it is sold.

INTRODUCTION
Congratulations on your purchase of the E-TON ATV. This ATV represents the result of many years
of E-TON experience in the production of fine sporting, touring, and pacesetting racing machines. With the
purchase of this E-TON, you can now appreciate the high degree of craftsmanship and reliability that have
made E-TON a leader in these fields.
This manual will provide you with a good basic understanding of the features and operation of this ATV.
This manual includes important safety information. It provides information about special tech-
niques and skills necessary to ride the ATV.It also includes basic maintenance and inspection proce-
dures. If you have any questions regarding the operation or maintenance of your ATV, please consult an
E-TON dealer.
AN IMPORTANT SAFETY MESSAGE:
READ THIS MANUAL TOGETHER WITH TIPS FOR THE ATV RIDER CAREFULLY AND COMPLETE-
LY BEFORE OPERATING YOUR ATV. MAKE SURE YOU UNDERSTAND ALL INSTRUCTIONS.
PAY CLOSE ATTENTION TO THE WARNING AND NOTICE LABELS ON THE ATV.
THIS ATV, AND ANY OTHER ATV OVER 90 cc, SHOULD NOT BE RIDDEN BY ANYONE UNDER 16
YEARS OF AGE.
NEVER OPERATE AN ATV WITHOUT PROPER TRAINING OR INSTRUCTION.
THIS ATV IS A HIGH-PERFORMANCE ATV FOR OFF-ROAD USE ONLY, FOR SPORT-TYPE REC-
REATIONAL AND COMPETITIVE USE BY EXPERIENCED OPERATORS.

WARNING
NOTICE
TIP
This is the safety alert symbol. It is used to alert you to potential
personal injury hazards. Obey all safety messages that follow this
symbol to avoid possible injury or death.
damage to the vehicle or other property.
A TIP provides key information to make procedures easier or clearer.
A WARNING indicates a hazardous situation which, if not avoided,
could result in death or serious injury.
A NOTICE indicates special precautions that must be taken to avoid
IMPORTANT MANUAL INFORMATION
FAILURE TO FOLLOW THE WARNINGS CONTAINED IN THIS MANUAL CAN RESULT IN SERIOUS IN-
JURY OR DEATH.
Particularly important information is distinguished in this manual by the following notations:
* Product and specifications are subject to change without notice.

IMPORTANT NOTICE
Welcome to the E-TON world of motor sports!
This ATV is designed and manufactured for OFF-ROAD use only. It is illegal and unsafe to operate this ATV
on any public street, road or highway.
This ATV complies with all applicable OFF-ROAD noise level and spark arrester laws and regulations in
effect at the time of manufacture.
Please check your local riding laws and regulations before operating this ATV.
VIPER 150
OWNER’S MANUAL
©2009 by E-TON POWER TECH., LTD.
1st edition, February 2009
All rights reserved.
Any reprinting or unauthorized use
without the written permission of
E-TON POWER TECH., LTD.
is expressly prohibited.
Printed in Taiwan.

TABLE OF CONTENTS
SAFETY INFORMATION..............................1-1
LOCATION OF THE WARNING AND
SPECIFICATION LABELS............................2-1
DESCRIPTION ..............................................3-1
Left view.....................................................3-1
Right view...................................................3-1
Controls and instruments...........................3-2
INSTRUMENT AND CONTROL
FUNCTIONS..................................................4-1
Main switch...............................................4-1
Handlebar switches ................................... 4-2
Throttle lever ............................................. 4-4
Speed limiting throttle adjustment ............. 4-4
Front brake lever ....................................... 4-6
Rear brake lever ....................................... 4-6
Parking brake ............................................ 4-7
Fuel tank cap ............................................ 4-8
Fuel ........................................................... 4-8
Fuel cock .............................................. 4-10
Choke ..................................................... 4-11
Seat ........................................................ 4-11
PRE-OPERATION CHECKS.........................5-1
Pre-operation check list............................5-1
Fuel ........................................................... 5-3
Engine oil .................................................. 5-3
Final transmission oil ................................ 5-3
Front and rear brakes ............................... 5-3
Throttle lever ............................................. 5-4
Tires .......................................................... 5-4
Tire pressure.............................................. 5-4
Drive chain ................................................ 5-4
Tire information ........................................ 5-6
Aftermarket tires and rims ........................ 5-6
Tire wear limit ........................................... 5-6
Chassis fasteners ..................................... 5-7
Instruments and switches ......................... 5-7
Kickstarter .............................................. 4-12
Transmission gear indicator light................ 4-2
Transmission gear selector........................ 4-8
WARNING
A WARNING indicates a hazardous situation
which, if not avoided, could result in death
or serious injury.
Vehicle speed limiter .................................. 4-5

Cleaning the spark arrester ...................... 8-17
Adjusting the carburetor ........................... 8-18
Adjusting the engine idling speed ............ 8-18
Checking the throttle cable free play ....... 8-19
Valve clearance ....................................... 8-20
Brakes ..................................................... 8-20
Checking the front brake shoes................ 8-20
Adjusting the front brake lever free
play ....................................................... 8-21
Checking the rear brake pads ................. 8-23
Checking the brake fluid level ................. 8-23
Changing the rear brake fluid .................. 8-24
Checking the rear brake lever free
play ........................................................8-24
Checking and lubricating the cables........ 8-25
Checking and lubricating the front
and rear brake levers.............................. 8-25
Checking the wheel hub bearings ............ 8-26
RIDING YOUR ATV......................................7-1
GETTING TO KNOW YOUR ATV...............7-2
RIDE WITH CARE AND GOOD
JUDGEMENT............................................ 7-2
BE CAREFUL WHERE YOU RIDE...........7-11
TURNING YOUR ATV..............................7-15
CLIMBING UPHILL....................................7-17
RIDING DOWNHILL..................................7-20
CROSSING A SLOPE................................7-21
CROSSING THROUGH SHALLOW
WATER ................................................... 7-22
RIDING OVER ROUGH TERRAIN...........7-24
SLIDING AND SKIDDING.........................7-25
WHAT TO DO IF.......................................7-26
WHAT TO DO... ........................................ 7-26
PERIODIC MAINTENANCE AND MINOR
REPAIR..........................................................8-1
Owner’s manual and tool kit ...................... 8-1
Periodic maintenance chart for the
emission control system .......................... 8-3
General maintenance and lubrication
chart ........................................................ 8-5
Checking the spark plug .............................8-9
Inline fuel filter .......................................... 8-10
Parking on a slope ..................................... 6-5
Accessories and loading ............................ 6-6 Engine oil ................................................. 8-11
Final transmission oil ................................ 8-14
Cleaning the air filter element .................. 8-15
Engine break-in ......................................... 6-4
Parking ...................................................... 6-4
OPERATION................................................6-1
Starting a cold engine ............................... 6-1
Starting a warm engine ............................. 6-3

SPECIFICATIONS ..................................... 10-1
CONSUMER INFORMATION .....................11-1
Identification numbers ............................ 11-1
Noise regulation ..................................... 11-3
Maintenance record ............................... 11-4
ETON AMERICA, LLC.
LIMITED VEHICLE WARRANTY ......... 11-5
CLEANING AND STORAGE........................9-1
Cleaning .................................................... 9-1
Storage ..................................................... 9-2
Troubleshooting ....................................... 8-32
Troubleshooting chart .............................. 8-33
Installing a wheel .................................... 8-31
Battery ..................................................... 8-26
Replacing the fuse ................................... 8-28
Removing a wheel ................................... 8-30
Drive chain slack....................................... 8-29

SAFETY INFORMATION
AN ATV IS NOT A TOY AND CAN BE HAZARD-
OUS TO OPERATE.
An ATV handles differently from other vehicles, in-
cluding motorcycles and cars. A collision or roll-
over can occur quickly, even during routine
maneuvers such as turning and riding on hills or
over obstacles, if you fail to take proper precau-
tions.
SEVERE INJURY OR DEATH can result if you do
not follow these instructions:
Read this manual and all labels carefully and fol-
low the operating procedures described.
Never operate an ATV without proper training or
instruction.
Always follow the age recommendation:
– A child under 16 years old should never oper-
ate an ATV with engine size greater than 90 cc.
Never allow a child under age 16 to operate an
ATV without adult supervision, and never allow
continued use of an ATV by a child if he or she
does not have the abilities to operate it safely.
Never carry a passenger on an ATV.
Always avoid operating an ATV on any paved
surfaces, including sidewalks, driveways, park-
ing lots and streets.
Never operate an ATV on any public street, road
or highway, even dirt or gravel one.
Never operate an ATV without wearing an ap-
proved motorcycle helmet that fits properly. You
should also wear eye protection (goggles or face
shield), gloves, boots, a long-sleeved shirt or a
jacket, and long pants.
Never consume alcohol or drugs before or while
operating this ATV.
Never operate at speeds too fast for your skills
or the riding conditions. Always go at a speed
1
1-1

1-2
1
that is proper for the terrain, visibility, operating
conditions, and your experience.
Never attempt wheelies, jumps, or other stunts.
Always inspect your ATV each time you use it to
make sure it is in safe operating condition. Al-
ways follow the inspection and maintenance
procedures and schedules described in this
manual.
Always keep both hands on the handlebars and
both feet on the footrests of the ATV during op-
eration.
Always go slowly and be extra careful when op-
erating on unfamiliar terrain. Always be alert to
changing terrain conditions when operating the
ATV.
Never operate on excessively rough, slippery or
loose terrain until you have learned and prac-
ticed the skills necessary to control the ATV on
such terrain. Always be especially cautious on
these kinds of terrain.
Always follow proper procedures for turning as
described in this manual. Practice turning at low
speeds before attempting to turn at faster
speeds and never turn at excessive speeds.
Never operate the ATV on hills too steep for the
ATV or for your abilities. Practice on smaller hills
before attempting larger hills.
Always follow proper procedures for climbing
hills as described in this manual. Check the ter-
rain carefully before you start up any hill. Never
climb hills with excessively slippery or loose sur-
faces. Shift your weight forward. Never open the
throttle suddenly or make sudden gear changes.
Never go over the top of a hill at high speed.
Always follow proper procedures for going down
hills and for braking on hills as described in this
manual. Check the terrain carefully before you
start down any hill. Shift your weight backward.
Never go down a hill at high speed. Avoid going
down a hill at an angle that would cause the ve-
hicle to lean sharply to one side. Go straight
down the hill where possible.
Always follow proper procedures for crossing
the side of a hill as described in this manual.
Avoid hills with excessively slippery or loose sur-
faces. Shift your weight to the uphill side of the
ATV. Never attempt to turn the ATV around on
any hill until you have mastered the turning tech-
nique described in this manual on level ground.
Avoid crossing the side of a steep hill if possible.
Always use proper procedures if you stall or roll
backwards when climbing a hill. To avoid stall-

1
1-3
ing, use the proper gear and maintain a steady
speed when climbing a hill. If you stall or roll
backwards, follow the special procedure for
braking described in this manual. Dismount on
the uphill side or to a side if pointed straight up-
hill. Turn the ATV around and remount, following
the procedure described in this manual.
Always check for obstacles before operating in a
new area.
Never attempt to operate over large obstacles,
such as large rocks or fallen trees. Always follow
proper procedures when operating over obsta-
cles as described in this manual.
Always be careful when skidding or sliding.
Learn to safely control skidding or sliding by
practicing at low speeds and on level, smooth
terrain. On extremely slippery surfaces, such as
ice, go slowly and be very cautious in order to re-
duce the chance of skidding or sliding out of con-
trol.
Never operate an ATV in fast flowing water or in
water deeper than that recommended in this
manual. Remember that wet brakes may have
reduced stopping ability. Test your brakes after
leaving water. If necessary, apply them several
times to let friction dry out the linings.
Always use the size and type of tires specified in
this manual.
Always maintain proper tire pressure as de-
scribed in this manual.
Never modify an ATV through improper installa-
tion or use of accessories.
Never exceed the stated load capacity for an
ATV. Cargo should be properly distributed and
securely attached. Reduce speed and follow in-
structions in this manual for carrying cargo or
pulling a trailer. Allow greater distance for brak-
ing.
When transporting the ATV in another vehicle,
be sure it is kept upright and that the fuel cock
is in the “OFF” position. Otherwise, fuel may leak
out of the carburetor or fuel tank.

1-4
1
Avoid Carbon Monoxide Poisoning
carbon monoxide can collect rapidly and you can
quickly be overcome and unable to save yourself.
Also, deadly levels of carbon monoxide can linger
for hours or days in enclosed or poorly ventilated
areas. If you experience any symptoms of carbon
monoxide poisoning, leave the area immediately,
get fresh air, and SEEK MEDICAL TREATMENT.
Do not run engine indoors. Even if you try to
ventilate engine exhaust with fans or open win-
dows and doors, carbon monoxide can rapidly
reach dangerous levels.
Do not run engine in poorly ventilated or partially
enclosed areas such as barns, garages, or car-
ports.
Do not run engine outdoors where engine exh-
aust can be drawn into a building through open-
ings such as windows and doors.
All engine exhaust contains carbon monoxide, a
deadly gas. Breathing carbon monoxide can cause
headaches, dizziness, drowsiness, nausea, con-
fusion, and eventually death.
Carbon Monoxide is a colorless, odorless, tasteless
gas which may be present even if you do not see
or smell any engine exhaust. Deadly levels of

1
1-5
Down load your free copy of E-TON’s
ATV Rider Safety Handbook
From www.etonamerica.com

LOCATION OF THE WARNING AND SPECIFICATION LABELS
1
2
3
4
5 (Only for Europe)
6 (Only for Europe)
2-1
2
Read and understand all of the labels on your ATV. These labels contain important information for safe and
proper operation.
Never remove any labels from your ATV. If a label becomes difficult to read or comes off, request a replace-
ment label from your E-TON dealer.

2-2
2
21
H7101-FID0-0000
I
I

2-3
2
43
56

3-1
3
DESCRIPTION
1. Fuel cock
2. Rear wheel
3. Footrest
4. Front wheel
1. Spark arrester
2. Seat
3. Footrest
Right view
3
12
2
3
1
4
Left view

3-2
3
10 11
12
Controls and instruments
1. Rear brake lever
2. Parking brake
3. Front brake lever
4. Throttle lever
5. Main switch
6. Fuel tank cap
8. Handlebar switches
7. Auxiliary 12v DC Electrical Outlet
9. Choke
TIP
The ATV you have purchased may differ slightly
from the figures shown in this manual.
10. Fuel Gauge
11. Transmission gear indicator light
12. Transmission gear Shift Shaft
5
12
8 76
3
9
4

4-1
4
INSTRUMENT AND CONTROL FUNCTIONS
Main switch
The positions of the main switch are as follows:
ON
All electrical systems are supplied with power, and
the engine can be started. The key cannot be re-
moved.
OFF
All electrical systems are off. The key can be re-
moved.
a. Main switch
O F F
O
I
I
T
I
N
G
N
a
1
0
A WARNING indicates a hazardous situation
which, if not avoided, could result in death
or serious injury.
WARNING

4-2
4
N
FR
Handlebar switches
Engine stop switch “ENG. STOP”
Set this switch to “ ” before starting the engine.
The engine stop switch controls the ignition and
stops the engine when it is running. Use this switch
to stop the engine in an emergency situation. The
engine will not start or run when this switch is set
to “ ”.
Transmission gear indicator light
Neutral indicator light “F”
This indicator light comes on when the transmis-
sion is in the forward position.
1. Forward indicator light “F”
231
2. Neutral indicator light “N”
3. Reverse indicator light “R”
Neutral indicator light “N”
This indicator light comes on when the transmis-
sion is in the neutral position.
Neutral indicator light “R”
This indicator light comes on when the transmis-
sion is in the reverse position.
3. Engine stop switch “ENG. STOP”
4. Horn switch “HORN”
1. Start switch “START”
2. Light switch “LIGHTS”
2
4
13