Lynx RADIEN Trail Series Manual

WARNING
OPERATOR’S
GUIDE
619 900 989 Original Instructions
Includes
Safety, Vehicle and
Maintenance Information
Read this guide thoroughly.
It contains important safety information.
Minimum recommended age: Operator: 16 years old.
Keep this Operator’s Guide in the vehicle.
RADIEN
Trail / Crossover E-TEC®Series

WARNING
Disregarding any of the safety precautions and instructions
contained in this Operator's Guide,
SAFETY VIDEO and
on-product safety labels could cause injury including the pos-
sibility of death!
WARNING
This vehicle may exceed the performance of other vehicles
you may have ridden. Take time to familiarize yourself with
your new vehicle.
Lynx products are manufactured by Bombardier Recreational
Products Inc.
The following are trademarks of Bombardier Recreational Products
Inc. or its subsidiaries.
D.E.S.S.™ HPG™ RAVE™ ROTAX™
E-TEC®Lynx®RER™ XPS™
The KYB Pro series is a registered mark of KYB America LLC.
619900989 en ML
®™ and the BRP logo are trademarks of Bombardier Recreational Products Inc. or its affiliates.
©2021 Bombardier Recreational Products Inc. and BRP US Inc. All rights reserved.

FOREWORD
MODEL PACKAGE ENGINE
Enduro 600R E-TEC
600R E-TEC
Rave
RE 3500
850 E-TEC
600 EFI
3700
600R E-TEC
RE 3700 850 E-TEC
3900 600R E-TEC
RE 3900 850 E-TEC
600R E-TEC
Xterrain
PRO 3900
850 E-TEC
__________________ 1

FOREWORD
Deutsch
Dieses Handbuch ist möglicherweise in Ihrer Landessprache
verfügbar. Bitte wenden Sie sich an Ihren Händler oder besuchen Sie:
www.operatorsguides.brp.com
English This guide may be available in your language. Check with your dealer or
go to: www.operatorsguides.brp.com
Español Es posible que este manual esté disponible en su idioma. Consulte a su
distribuidor o visite: www.operatorsguides.brp.com
Français Ce guide peut être disponible dans votre langue. Vérifier avec votre
concessionnaire ou aller à: www.operatorsguides.brp.com
日本語
このガイドは、言語によって翻訳版が用意されています。.
ディーラーに問い合わせるか、次のアドレスでご確認ください：
www.operatorsguides.brp.com
Nederlands Deze handleiding kan beschikbaar zijn in uw taal. Vraag het aan uw dealer
of ga naar: www.operatorsguides.brp.com
Norsk Denne boken kan finnes tilgjengelig på ditt eget språk. Kontakt din
forhandler eller gå til: www.operatorsguides.brp.com
Português Este manual pode estar disponível em seu idioma. Fale com sua
concessionária ou visite o site: www.operatorsguides.brp.com
Suomi Käyttöohjekirja voi olla saatavissa omalla kielelläsi. Tarkista jälleenmyyjältä
tai käy osoitteessa: www.operatorsguides.brp.com
Svenska Denna bok kan finnas tillgänglig på ditt språk. Kontakta din återförsäljare
eller gå till: www.operatorsguides.brp.com
本手册可能有您的语种的翻译版本。请向经销商问询，或者登录
www.operatorsguides.brp.com
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Italiano Questa guida potrebbe essere disponibile nella propria lingua. Contattare
il concessionario o consultare:
Русский
Воспользуйтесь руководством на вашем языке. Узнайте
о его наличии у дилера или на странице по адресу
www.operatorsguides.brp.com
www.operatorsguides.brp.com
Congratulations on your purchase of a new Lynx®snowmobile.
Whatever model you have chosen, it is backed by the Bombardier
Recreational Products Inc. (BRP) warranty and a network of autho-
rized Lynx snowmobile dealers ready to provide the parts, service or
accessories you may require.
Your dealer is committed to your satisfaction. He has taken training
to perform the initial set-up and inspection of your snowmobile as
well as completed the final adjustment required to suit your specific
weight and riding environment before you took possession.
At delivery, you were informed of the warranty coverage and signed
the
PREDELIVERY CHECK LIST to ensure your new vehicle was pre-
pared to your entire satisfaction.
2__________________

FOREWORD
Know Before you Go
To learn how to reduce the risk for you, your passenger or bystanders
being injured or killed, read the following sections before you operate
the vehicle:
–
SAFETY INFORMATION
– VEHICLE INFORMATION .
Also read all safety labels on your snowmobile and watch atten-
tively your
SAFETY VIDEO located at www.brplynx.com/en/own-
ers/safety/safety-information.html.
We highly recommend that you take a safety riding course. Please
check with your dealer or local authorities for availability in your area.
Failure to follow the warnings contained in this Operator's Guide can
result in SERIOUS INJURY or DEATH.
The proper functioning of a snowmobile depends in part on the
surface on which it is driven. See
RIDING CONDITIONS AND YOUR
SNOWMOBILE
for details.
Safety Messages
The types of safety messages, what they look like and how they are
used in this guide are explained as follows:
The safety alert symbol indicates a potential injury hazard.
WARNING
Indicates a potential hazard, if not avoided, could result in se-
rious injury or death.
CAUTION Indicates a hazard situation which, if not avoided,
could result in minor or moderate injury.
NOTICE Indicates an instruction which, if not followed, could
severely damage vehicle components or other property.
__________________ 3

FOREWORD
About this Operator's Guide
This Operator's Guide has been prepared to acquaint the
owner/operator and passenger with this snowmobile and its various
controls, safe riding and maintenance instructions.
The following terminology in regards to operator, passenger and ve-
hicle configuration is used as follows throughout this guide:
–Operator: refers to the person being behind the controls and
driving the snowmobile.
–Passenger: refers to a person sitting behind the operator.
–1-UP: refers to a model designed for an operator only.
–2-UP: refers to a model designed to accommodate one passen-
ger.
Keep this Operator's Guide in the vehicle as you can refer to it for
things such as maintenance, troubleshooting and instructing others.
Note that this guide is available in several languages. In the event of
any discrepancy, the English version shall prevail.
If you want to view and/or print an extra copy of your
Operator's Guide, simply visit the following website
www.operatorsguides.brp.com.
The information contained in this document is correct at the time
of publication. BRP, however, maintains a policy of continuous
improvement of its products without imposing upon itself any obli-
gation to install them on products previously manufactured. Due to
late changes, some differences between the manufactured product
and the descriptions and/or specifications in this guide may occur.
BRP reserves the right at any time to discontinue or change speci-
fications, designs, features, models or equipment without incurring
any obligation upon itself.
This Operator's Guide should remain with the vehicle when it's sold.
4__________________

TABLE OF CONTENTS
FOREWORD ........................................................ 1
Know Before you Go............................................ 3
Safety Messages................................................ 3
About this Operator's Guide .................................... 4
SAFETY INFORMATION
GENERAL PRECAUTIONS ....................................... 12
Avoid Carbon Monoxide Poisoning . . .......................... 12
Avoid Gasoline Fires and Other Hazards....................... 12
Avoid Burns from Hot Parts.................................... 13
Accessories and Modifications ................................ 13
SPECIAL SAFETY MESSAGES .................................. 14
RIDING THE VEHICLE ............................................ 19
Pre-Ride Inspection ............................................ 19
How to Ride .................................................... 22
Carrying a Passenger........................................... 26
Terrain/Riding Variations........................................ 28
Environment.................................................... 35
TRACTION ENHANCING PRODUCTS........................... 38
Manoeuvrability . ............................................... 38
Acceleration . ................................................... 41
Braking.......................................................... 41
Important Safety Rules......................................... 41
Effects of Having a Studded Track on the Life of the
Snowmobile.................................................... 42
Installation of Studs on BRP Approved Tracks................. 42
Maintenance/Replacement .................................... 45
SAFETY INFORMATION ON THE VEHICLE..................... 46
Hang Tag(s)..................................................... 46
Vehicle Safety Labels .......................................... 48
Technical Information Labels................................... 58
VEHICLE INFORMATION
CONTROLS, INSTRUMENTS AND EQUIPMENT............... 64
Handlebar....................................................... 64
Throttle Lever .................................................. 65
Brake Lever..................................................... 67
Parking Brake Lever............................................ 68
__________________ 5

TABLE OF CONT ENTS
CONTROLS, INSTRUMENTS AND EQUIPMENT (cont’d)
Engine Cut-off Switch.......................................... 70
Emergency Engine Stop Switch . . .. . . ......................... 72
Console Switches (if equipped)................................ 75
Ignition Switch (if equipped) . . . ................................ 79
SHOT/Electric Start/Electronic Reverse (RER) Button (if
equipped) ....................................................... 80
Multifunction Switch (if equipped) . . . .......................... 81
Rewind Starter Handle (if equipped). . ......................... 87
Storage Compartment ......................................... 88
Operator's Guide............................................... 89
Seat............................................................. 89
Front and Rear Bumpers....................................... 90
Drive Belt Guard................................................ 92
Tools ............................................................ 95
Spare Drive Belt Holder........................................ 98
Upper Body Module . . . ....................................... 100
Side Panels ................................................... 105
Electric Visor Jack Connector (If Equipped) . . ............... 107
Mountain Strap (If Equipped) . . .............................. 108
Horn Button (Not illustrated on vehicle) ..................... 109
4.5" DIGITAL DISPLAY . . . ....................................... 110
Multifunction Display......................................... 110
Warning Lamps and Indicators............................... 113
Settings....................................................... 114
7.2" DIGITAL DISPLAY . . . ....................................... 116
Multifunction Display......................................... 116
Warning Lamps and Indicators............................... 119
Settings....................................................... 120
FUEL ............................................................. 123
Fuel Requirements . . . . . ...................................... 123
Vehicle Fueling Procedure ................................... 124
INJECTION OIL.................................................. 127
Recommended Injection Oil . . . .............................. 127
Injection Oil Level Verification ............................... 127
BREAK-IN PERIOD .............................................. 130
Operation During Break-In ................................... 130
6__________________

TABLE OF CONTENTS
BASIC PROCEDURES........................................... 131
Engine Starting Procedure . .................................. 131
Emergency Starting . . . . ...................................... 132
Vehicle Warm-Up............................................. 134
Reverse (RER)................................................ 135
Shutting Off the Engine...................................... 137
RIDING CONDITIONS AND YOUR SNOWMOBILE .......... 138
Altitude ....................................................... 138
Temperature.................................................. 138
Hard Packed Snow........................................... 138
SPECIAL OPERATION .......................................... 140
Towing an Accessory......................................... 140
Towing Another Snowmobile................................ 140
TUNE YOUR RIDE............................................... 141
Rear Suspension Adjustments............................... 142
Front Suspension Adjustments.............................. 149
Adjustment Tips According to Vehicle Behavior............. 155
Suspension Adjustment Table . .............................. 156
VEHICLE TRANSPORTATION.................................. 159
MAINTENANCE
MAINTENANCE SCHEDULE ................................... 162
MAINTENANCE PROCEDURES ............................... 165
Engine Coolant ............................................... 165
Exhaust System.............................................. 166
Spark Plugs................................................... 167
Brake Fluid.................................................... 167
Chaincase Oil................................................. 169
Drive Chain ................................................... 173
Drive Belt..................................................... 174
Drive Pulley................................................... 180
Track .......................................................... 185
Suspension . . ................................................. 194
Skis ........................................................... 195
Fuses ......................................................... 195
Headlights.................................................... 198
Battery (if equipped). . . . ...................................... 204
__________________ 7

TABLE OF CONTENTS
VEHICLE CARE.................................................. 207
Post-Operation Care.......................................... 207
Vehicle Cleaning and Protection ............................. 207
STORAGE........................................................ 208
Engine Storage Mode........................................ 208
TECHNICAL INFORMATION
VEHICLE IDENTIFICATION..................................... 216
Vehicle Description Decal.................................... 216
Identification Numbers . ...................................... 216
NOISE EMISSION AND VIBRATION VALUES................ 220
EC DECLARATION OF CONFORMITY ......................... 221
EAC DECLARATION OF CONFORMITY ....................... 222
RADIO FREQUENCY DIGITALLY ENCODED SECURITY SYSTEM
(RF D.E.S.S. KEY) . . ............................................. 223
SPECIFICATIONS (ENGINE).................................... 224
SPECIFICATIONS (VEHICLE)................................... 227
TROUBLE-SHOOTING
TROUBLESHOOTING GUIDELINES........................... 240
MONITORING SYSTEM . . ...................................... 243
Pilot Lamps, Messages and Beeper Codes .. ............... 243
WARRANTY
BRP FINLAND OY INTERNATIONAL LIMITED WARRANTY: 2021
LYNX®SNOWMOBILES........................................ 248
BRP FINLAND OY LIMITED WARRANTY FOR THE EUROPEAN
AND THE COMMONWEALTH OF THE INDEPENDENT STATES
(CIS) AREAS AND TURKEY : 2021 LYNX®SNOWMOBILES 253
MAINTENANCE RECORDS .................................... 259
CUSTOMER INFORMATION
PRIVACY INFORMATION....................................... 266
8__________________

TABLE OF CONTENTS
CONTACT US ................................................... 267
Asia........................................................... 267
Europe........................................................ 267
North America................................................ 268
Oceania....................................................... 268
South America................................................ 268
CHANGE OF ADDRESS/OWNERSHIP ........................ 269
__________________ 9

TABLE OF CONTENTS
10 __________________

SAFETY
INFORMATION
____ SAFETY INFORMATION ___ 11

GENERAL PRECAUTIONS
Avoid Carbon Monoxide Poisoning
All engine exhaust contains carbon monoxide, a deadly gas. Breath-
ing carbon monoxide can cause headaches, dizziness, drowsiness,
nausea, confusion and eventually death.
Carbon monoxide is a colorless, odorless, tasteless gas that may be
present even if you do not see or smell any engine exhaust. Deadly
levels of 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 poison-
ing, leave the area immediately, get fresh air and seek medical treat-
ment.
To prevent serious injury or death from carbon monoxide:
– Never run the vehicle in poorly ventilated or partially enclosed ar-
eas such as garages, carports or barns. Even if you try to venti-
late engine exhaust with fans or open windows and doors, carbon
monoxide can rapidly reach dangerous levels.
– Never run the vehicle outdoors where engine exhaust can be
drawn into a building through openings such as windows and
doors.
Avoid Gasoline Fires and Other Hazards
Gasoline is extremely flammable and highly explosive. Fuel vapors
can spread and be ignited by a spark or flame many feet away from
the engine. To reduce the risk of fire or explosion, follow these in-
structions:
– Use only an approved gasoline container to store fuel.
– Strictly adhere to instructions in
VEHICLE FUELING PROCE-
DURE
.
– Never start or operate the engine if the fuel cap is not properly in-
stalled.
Gasoline is poisonous and can cause injury or death.
– Never siphon gasoline by mouth.
– If you swallow gasoline, get any in your eye or inhale gasoline va-
por, see your doctor immediately.
If gasoline spills on you, wash with soap and water and change your
clothes.
12 ____SAFETY INFORMATION____

GENERAL PRECAUTIONS
Avoid Burns from Hot Parts
The exhaust system and engine become hot during operation. Avoid
contact during and shortly after operation to avoid burns.
Accessories and Modifications
Do not make unauthorized modifications, or use attachments or ac-
cessories that are not approved by BRP. Since these changes have
not been tested by BRP, they may increase the risk of crashes or in-
juries, and they can make the vehicle illegal.
Tunnel accessories must be loaded onto vehicle as per instructions
provided for each accessories.
Accessory passenger seats approved by BRP and conforming to
SSCC standards may be available for certain models. If such a seat
is used, you must follow the guidelines and recommendations in
regards to a passenger in this guide.
WARNING
Passenger seat must have a strap or handholds and must meet
SSCC standards.
See your authorized Lynx dealer for available accessories for your ve-
hicle.
____ SAFETY INFORMATION ___ 13

SPECIAL SAFETY MESSAGES
SEVERE INJURY OR DEATH can result if you do not follow these in-
structions:
– Always make a pre-ride inspection BEFORE you start the engine.
– Throttle mechanism should be checked for free movement and
return to idle position before starting engine.
– Always attach tether cord eyelet to clothing before starting the
engine.
– Never operate the engine without belt guard and brake disk
guard securely installed or, with hood or side panels opened
or removed. Never run the engine without drive belt installed.
Running an unloaded engine such as without drive belt or with
track raised, can be dangerous.
– Always engage parking brake before starting the engine.
– Everyone is a beginner the first time he sits behind the controls
of a snowmobile regardless of previous experience in driving any
other type of vehicle. The safe use of your snowmobile depends
on many conditions such as visibility, speed, weather, environ-
ment, traffic, vehicle condition and the condition of the operator.
– Basic training is required for the safe operation of any snow-
mobile. Study your operator's guide paying particular attention
to cautions and warnings. Join your local snowmobile club: its
social activities and trail systems are planned for both fun and
safety. Obtain basic instructions from your snowmobile dealer,
friend, fellow club member or enroll in your state or provincial
safety training program.
– Any new operator must read and understand all safety labels on
the snowmobile, the Operator's Guide and watch the
SAFETY
VIDEO
at www.brplynx.com/en/owners/safety/safety-informa-
tion.html before operating the snowmobile. Only allow a new
operator to operate the snowmobile in a restricted flat area, at
least until he is completely familiar with its operation. If snow-
mobile operator's training course is offered in your area, have
him enroll.
– The performance of some snowmobiles may significantly exceed
that of other snowmobiles you have operated. Therefore, use by
novice or inexperienced operators is not recommended.
– Snowmobiles are used in many areas and in many snow condi-
tions. Not all models perform the same in similar conditions. Al-
ways consult your snowmobile dealer when selecting the snow-
mobile model for your particular needs and uses.
14 ____SAFETY INFORMATION____

SPECIAL SAFETY MESSAGES
– Injury or death may result to the snowmobile operator, passenger
or bystander if the snowmobile is used in risky conditions which
are beyond the operator's, passenger's or snowmobile's capabil-
ities or intended use.
– BRP recommends the operator has at least 16 years old of age.
Verify also your local laws for age and training requirements.
– It is very important to inform any operator, regardless of his
experience, of the handling characteristics of this snowmobile.
The snowmobile configuration, such as ski stance, ski type, sus-
pension type, track length, width and type vary from a model to
another. The snowmobile handling is greatly influenced by these
characteristics.
– The novice operator should become familiar with the snowmobile
through practice on a level area at slow speeds before venturing
far afield.
– Know your local laws. Federal, state, provincial and local gov-
ernment agencies have enacted laws and regulations pertaining
to the safe use and operation of snowmobiles. It is your re-
sponsibility as a snowmobiler to learn and obey these laws and
regulations. Respect and observance will result in safer snow-
mobiling for all. Be aware of the liability property damages and
insurance laws regarding your equipment.
– Speeding can be fatal. In many cases, you cannot react or re-
spond quickly enough to the unexpected. Always ride at a speed
which is suitable to the trail, weather conditions and your own
ability. Know your local rules. Speed limit may be in effect and
meanttobeobserved.
– Always keep right hand side of the trail.
– Always keep a safe distance from other snowmobiles and by-
standers.
– Remember, promotional material may show risky maneuvers per-
formed by professional riders under ideal and/or controlled condi-
tions. You should never attempt any such risky maneuvers if they
are beyond your level of riding ability.
– Never use this vehicle with drugs or alcohol. They slow reaction
time and impair judgement.
– Your snowmobile is not designed to be operated on public
streets, roads or highways.
____ SAFETY INFORMATION ___ 15

SPECIAL SAFETY MESSAGES
– Avoid road traveling. If you must do so, and it is permitted, re-
duce speed. The snowmobile is not designed to operate or turn
on paving. When crossing a road, make a full stop, then look
carefully in both directions before crossing at a 90° angle. Be
wary of parked vehicles.
– Snowmobiling at night can be a delightful experience but be-
cause of reduced visibility, be extra cautious. Avoid unfamiliar
terrain and be sure your lights are working. Always carry a flash-
light and spare light bulbs.
– Never remove any original equipment from your snowmobile.
Each vehicle has many built in safety features. Such features
include various guards and consoles, plus reflective materials
and safety labels.
– Nature is wonderful but don't let it distract your attention from
driving. If you want to truly appreciate winter's scenery, stop
your snowmobile on the side of the trail so that you don't become
a hazard to others.
– Fences represent a very serious threat for both you and your
snowmobile. Give a wide berth to telephone poles or posts.
– Hidden wires unseen from a distance can cause serious acci-
dents.
– Always wear an approved safety helmet, eye protection and a
face shield. This also applies to your passenger.
– Be aware of inherent risks associated with riding off trails, such as
avalanche and other natural or man made hazards or obstacles.
– Tailgating another snowmobile should be avoided. If the snow-
mobile in front of you slows for any reason, its operator and
passenger could be harmed through your neglect. Maintain a
safe stopping distance between you and the snowmobile in front
of you. Depending on the terrain condition, stopping may require
a little more space than you think. Play it safe. Be prepared to
use evasive driving.
– Venturing out alone with your snowmobile could also be haz-
ardous. You could run out of fuel, have an accident, or damage
your snowmobile. Remember, your snowmobile is capable of
traveling further in half an hour than you may be able to walk
in a day. Use the “buddy system”. Always ride with a friend
or member of your snowmobile club. Even then, tell someone
where you are going and the approximate time you plan to return.
16 ____SAFETY INFORMATION____

SPECIAL SAFETY MESSAGES
– Meadows sometimes have low areas where water accumulate
and freezes over in winter. This ice is usually glare ice. Attempt-
ing to turn or brake on this surface could cause your vehicle to
spin out of control. Never brake or attempt speeding or turning
on glare ice. If you do happen to travel over such a condition,
reduce speed by carefully releasing the throttle.
– Never “jump” with your snowmobile.
– While on safari, do not “gun” the throttle. Snow and ice can be
thrown back into the path of a following snowmobile. In addition,
when “gunning” the throttle, the vehicle digs into and leaves an
irregular snow surface for others.
– Safaris are both fun and enjoyable but don't show off or overtake
others in the group. A less experienced operator might try to do
the same as you and fail. When riding with others, limit your abil-
ities to the experience of others.
– In an emergency, the snowmobile engine can be stopped by
pressing down on the emergency engine stop switch or by
pulling the tether cord cap from the engine cut-off switch, while
applying brake.
– Always engage parking brake when vehicle is not in use.
– Never run the engine in a non-ventilated area and/or if vehicle is
left unattended.
–Electric start models only: Never charge or boost a battery (if
equipped) while installed on snowmobile.
– Never attempt any fuel system or electrical system maintenance
or repair. Any maintenance or repair of these systems must be
performed by an authorized Lynx dealer.
– Ensure the path behind is clear of obstacles or bystanders before
proceeding in reverse.
– Always remove the tether cord cap from engine cut-off switch
when vehicle is not in operation in order to prevent accidental
engine starting, to avoid unauthorized use by children or others
or theft.
– NEVER stand behind or near a rotating track. Debris could be
projected causing severe injuries. To remove packed snow or
ice, stop engine, tilt and hold vehicle on its side and use wrench
tool on the belt guard.
– Do not stud the track unless it has been approved for studs. At
speed, a studded track that has not been approved for studs could
tear and separate from vehicle. See an authorized Lynx dealer for
current specific studding availability and applications.
____ SAFETY INFORMATION ___ 17

SPECIAL SAFETY MESSAGES
– You may stud the track on this vehicle model. However, you
MUST only use the BRP approved type stud for use on Lynx
snowmobiles. DO NOT EVER use conventional studs because
the track thickness is thinner then our standard tracks. The stud
could tear off of track and separate from vehicle.
– Always wear an approved helmet and follow the same dressing
guidelines as those recommended for the operator and described
in this guide.
– Make sure that you are able to achieve a stable stance, both feet
resting positively on the footboards of footrests with good grip,
and that you are able to hold on firmly to the handholds.
– When carrying a passenger, the operator is responsible for the
safety of the passenger. Always remember that the snowmobile
handling, stability and braking distance may be affected when
riding with a passenger.
– Before riding the vehicle, ask your passenger to inform you to
slowdown or stop immediately if he feels uncomfortable or in-
secure during the ride. Keep a watchful eye on your passenger
while riding.
18 ____SAFETY INFORMATION____