BOMBARDIER ski-doo Nordic 640ER 1974 User manual

1959
THE YEAR
OF OUR MILLIONTH
MACHINE
Wewish J. Armand Bombardier could be around to see that
millionth machine come off the production line this year. What
would the inventor of the snowmobile think about todav's jet-
age styling? Or the incredible technical advances under the
sleek cowling? We
think he'd be amazed - and proud.
In this year of the millionth machine, J. Armand Bombardier
would have a lot to be proud about. First of all, a million isan
impressive number of machines. But there's something more
important than quantity. The Ski-Doo" line-up of today reflects
all the experience and
know-how gained from the making of a
million machines.
At Bombardier, we've had time to learn all the tricks of
power and flotation. We've found out the pitfalls of operating
an engine in freezing conditions over every conceivable winter
terrain. And our experience shows. It shows in Ski-Doo* styling,
performance and dependability.
Another thing our founder wouldn't recognize is the factory.
From its start in a small garage, it's grown into the most advanced
snowmobile factory in the world. Bombardier employs designers,
engineers, specialists and craftsmen by the thousand. They
put
every Ski-Doo* through its paces, both in the versatile test labora-
tory, and on our outdoor speed track.
We've discovered that the best testing ground of all is the race
track. We're in racing
not only to win, but to learn. This year,
we've been able to make some pretty impressive technical improve-
ments to all our machines -- improvements made on the track to
help you on the trail.
It adds up to a machine you can depend on, all the time.
Your
Ski-Doo* will give you excellent performance in all weathers, on
all terrains.
Look after it well, and it will serveyou well. Your
Ski-Doo dealer is always ready with information, parts and acces-
sories. He is backed up by an international Ski-Doo distributor
and Dealer network whose factory trained personnel are equipped
to give you prompt and efficient service wherever you are in
snow
country.
Ride safe ... and have fun!
Laurent Beaudoin
President
Bombardier
Limited
•Registered Trademark of Bombardier Limited

Itns rnenuet has been nnhli.coh,C2rfh\l
Technical lntormation Center
Service Department
BC)~vlBA,R[)IER LIMITED
Valcourt. P,O. Canada"
Bomberdier
Elite
Everest
*The following are trademarks of Bombardier
Lirnited.
Ski-Doo
Ski·Boose
Nordic Blizzard
Alpine Carry·Boos'!!
PATENTS and DESIGNS
This vehiCle is cover-ed by one or more of the
following patents and design registrations.
Canadian Patents: 605, 317 . 710, 592· 724,
395··853,505·895,749·891,747 914,
457·916,204
United States Patents; 2,899,242· 3,066,546 .
3,536, 53 . 3,637,254 . 3.666,323 .
3,673,884 . 3,693,884 . 3,693,992
3,704,918.
Cenadian De£igns: 01/217 F/28172 ·Dl/249
F/31317 end 316" -032;479 - 032,535 -
D32,655 to 657 . D32,661 to '669 33,982
·33,933 34,006 and '007,
United States Design Patents:
Des. 221,332 to '334-
Des 221.637 and '638·
Des. 222,244 to '247
Others: Swedish Design :--·jo. 6038-
Swiss Design No. 104;756-
Norvvegl2n Des!-;;n No. 5'1,,444.
Other patent and dastgn appHcations pending.
WHAT YOU SHOULD KNOW
BEFORE fiRST RmE 2
SERViCE AREAS ,
:3
DO'S ,..".." 4
DONT'S " , 5
GOOD DRIViNG TECHNiQUE 6,1
CONTROLSIiNSTRUMENTS 8.9
FUEL MiXING " 10,1 '1
BREAK-iN PERiOD,
PRE·START CHECK 12,13
iN CASE Of EMERGENCY 13
STARTING PROCEDURE " 14
LUBRICATION m15,16
MAINTENANCE 8,19,20,21
w • _
EMERGENCY GUIDE ......m ••• 22
TROUBLE SHOOTING
23,24
OFF SEASON
STORAGE "
GiJ, • .e:.'U"e:,u ,,::,u
Ali TiJ!,ts rese,vecl 'L-Boml':;:mJier Limited 1973

to
road or
it
@ Your snowmobile is not ri",,,irmr-,ri
be driven or on black
earth. or other abrasive surfaces,
mal and excessive wear of critical parts
is inevitable
o
mobile
iocal laws the
@ Maintain your vehicle in top mechani-
cal condition at ail times.
Please read and understand all other
contained elsewh:ere in
this mar-Ill,,!.
parts of your snowmobile
@Your snowmobile is not desionec
be on streets,
ruqnwavs. In most States and Pr,;,.:,.".-,oo
is considered an operation.
e
Hidden guy Wires or road-
side ditches can cause serious
aceidents.
over
and/or
driver
backOf passenger
weakness
$Gasoline is f!amrnable and
under certain conditions.
in a weil 'ventilated area. Do
not smoke or allow open flames or sparks
;n the fumes are no-
the cause should be
determined and corrected without
e Under no circl.lmst1:lrlc6$ should you
,,'lear loose or scarves that
could become
erun the engine at R.P.M.
when the tracks of the vehicle are raised
off the
@ it can be dangerous to run with
the cab open.
without drive belt
an unloaded
that
must be
. ali aimed toward a more en-
season
tions. snow surfaces,
habits and vehicle have consider-
able affects VVe ask you familiarize
yourself with them. , . i"Slad the owner's
manual: has been to ac-
you vVlththe operation of
your ve-
its aspects and as
as nce
To many of us, Winter is a revealinq ex,
Weather, condi-
@ Throttle mechanism should be
checked for free movement before

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Ski-Doo
at both enos.
trader hitch and
cham are secure and that brake,
fiashers, and parking I are
a~! ~ n
protect
®Use a hitch or tow-bar when
any sled or trailer behind
your Ski-
snowmobile. Rhitches prevent
collision when
downhill or
on sudden stops.
e Be careful
when chli-
ride more and check
Small chlloren, are far safer
e:,r~.i-tlOO:3e sled than on the seat
new
of re-
eyou are to
areas; leave word of your approximate
whereabouts and estimated
turn with someone
make a fui! stop then look
"",n:,) ,iliv in both directions before cross-
\IVhen in or Hi a
,group, have one member direct the oth-
ers across
Qtravel with at least one other
snowmobile. in unfamihar ter-
rain or on fides. Even in snow-
mobilina.e beats one of a kind.
@\Nhen with others, limit your actions
to the of the main body
Show the driver how to
nrc)oF,rlv handle a snowmobile
snowmobile
landowners allow snow-
or, their property. '(au can
as much run, even more so,
tr~!v(~I;no elsewhere
@Obtain your State or Provincia! book-
let on It valuable
information on the na,nhhn,
mobile trails and the laws
snowmobilmq in your particular
@your Ski-Doo snowmobile at
your nearest Bureau, where
State or Provincia! l.aws it and
affix to the vehicle, Carry
your certificate with you, It
provides proof of the event
that the vehicle becomes lost or stolen,
'Trademark Bombardier LimltBj
4

switch
thieves and a
@ Don't get hands or feet In track or
parts If your vehicle ,"b09-
.stand to one squeeze
lift the rear grab
out the machine
@ "If you drink don't snowmobile! if
yOll snowmobile, don't drtnk!" Re-
member alcohol and don't rrux
$> Don't lend your snowmobile to
inexperienced or drivers In
manv cases it IS the
owner and
not the rider
that is for
mishaps Check State or Provincial min-
imum age limits for drivers
of those
$ Don't cross a river or lake without first
being that the thickness of the
ice IS sufficient to support both you and
vehicle. Your life may depend 011
If at ali in doubt, take an alternate
Unless you are certain of a
never travel
further than '12 of the
tank. Even then,
Remem-
does not neces-
travel the same distance each
time on the same amount of fuel. Alot
ri",np,nrk, on snow conditions of
the rail and adjustment of the
carburetor.
of the
!I stunt" men
law
@Never cut th,-nllnh fences or attempt
to run 0\/6r them
mobile
should be
@ Never ride
sound of your
out noise of
approachinq
vehicle
track
Provinces
<!III Don't risk or damage to
machine with needless and ish
Don't your snow-
snowrnobili
the ana
@Don't cut across in front of the line of
travel of another snowmobile
Don't tad-
gate; collision. or the threat of It, IS
serious with any vehicle
5

for
find
pressmq
footboard
the seat
hdi
one foot on each s!de,
Wa,fflil'm: Side hills and steep are
flot recommended for a beginner.
Sloe of the
site knee on the seat then lean Into
smon and one that is frf'irll'ien,tl'j
to both knees on the seal, w.t
a short stretch
when manoeuvennq
this pos.non however.
knees 'flexed
shocks
the best
Drivii1j'] Positions.
There are three
snowmobile-c-Standmq ':"0,01,0,",
Each presents "'""",,,,0' ""oc
rlrrnn,~,nn on the nature of the terrain,
condrnons. the turns desire or
the o~ dnver
pre-
snowmobile
rnanoeuvers
I li'Jll,l.J:_3"iy know your
it betore at
to go about it Here
ferred methods
;3

Ion recorn-
vehicle con-
ight changes .n
acceleration. vou are safe enough to 6X-
nevv areas, If not, turn in as wide
an arc as and look for firmer
trails
icy Surtace,
ice or snow can
be difficult to as both skis and
track do not have much traction. Best
advice is to slow down and avoid
acceleration or braking
Snow.
Use the stB
mended earher
nnues to make reasonable neaowav. re-
into the
snow surface
oller
andior
driver Of pliJ$$fln~r
back wea!<ru:!ss.
an normal
on the footboards.
way back on the seat Avoid
your foot inside the support braces
the footboard.

UP Before starting
engine
DOWN To stop
eng~ne
pops up
this vehicle should farni-
vVlth the function of th~,s
it several times en first
mentalI,!
"«o,,""c.orl
for emergency situations
f.lJter such a
malfunction should be
corrected before
activate,
automaticallv when lit,
position swirc
, turn
position im-
HElsdl!<linp DimmGi" Switch
The dimmer switch allows correct selec-
tion of beam. To obtain Hi or
Low beam switch A H~
beam indicator mounted In the ta-
chometer dial.
Note: The
beam has been pre-adjusted
Should you eadjustrnent
01" lower a'-'I"Q'U"H
obtain desired beam position
Kill BlJUcm
For ernergencv stops, press button
down into !l::lW«'»f nn<;ITlnn Before re-
button
to the
lever.
returns to rts onqllial position
i10tation of
the handlebar
U[1:""'''' .. 11' action on the <::t~,ocinl""1
the skis to turn in the re-
Brake lever
When lever the brake is
applied When released. rt automaticaltv
effect IS
pressure on
lever controls the
and the
of
the traru.missiOI1. When is re-
leased the returns auto-
rnancauv to
8