BOMBARDIER 1996 Ski-doo Formula III User manual

Type
User manual
1996 RACER HANDBOOK
TABLE OF CONTENTS
HOW TO COMMUNICATE mmmmmmmmmmmmmmmmm ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■
01-3
WHATS NEW FOR 1996 ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ mmmmmmmmmmmmammmmm m
02-1
CHASSIS PREPARATION
■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ mmmmmm=mmmmmmmmmmm ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ 9
03-1
ENGINE PREPARATION
■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■
04-1
TRANSMISSION SYSTEM ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ● mmmmmmmmmmmmmmmmmm mmmmammmmmmmmmmm
05-1
COMPETITION BULLETINS - RACING PARTS . . . . . . . . . . . . . . . . . . . . . . 06-1
COMPETITION PREPARATION
mmmmmmm
mmmmmmm
mmmmm9m
mmmmmmm
mmmmmmmmmmmmmmmmmm
07-1
+
WARNING : This information relates to the preparation and use of snowmobiles in
competitive events. Bombardier Inc. disclaims liability for all damages and / or injuries
resulting from the improper use of the contents. We strongly recommend that these modifica-
tions be carried out and / or verified by a highly-skilled professional racing mechanic. It is
understood that racing or modifications of any Bombardier-made snowmobile voids the vehicle
warranty and that such modifications may render use of the vehicle illegal in other than sanc-
tioned racing events under existing federal, provincial and state regulations.
KEEPING YOUR MACHINE LEGAL IS YOUR RESPONSIBILITY
Read and know your rule books.
01-1
Section 01 HOW TO COMMUNICATE
If you have any suggestions on new information and ideas to improve next year’s handbook,
including any errors or omissions, please mail or fax to;
Ski
Doo
Race Department
Bombardier Corp.,
PO B
OX 8035
Wausau, Wise.
54402-8035.
For additional information or to pass on your feedback and suggestions please contact the
following people (by fax only) using the racer report format.
Your information is important to us
Ovals, Drags, Speed runs
Bill
Rader
Phone hotline
715-847-6884
Fax hotline
715-847-6869
Mountain, hill climb, deep snow
Mark Thompson
Fax hotline
801-752-8249
Cross-Country, Sno Cross
Bill
Rader
Phone hotline
715-847-6884
Fax hotline
715-847-6869
To ensure timely and accurate response to questions we will respond by fax, whenever possible.
A wide range of excellent publications and special tools are available to support your racing
activities.
See Section 06-1, Competition bulletins-racing parts, useful publications.
NOTE : Order all items through your local Ski
Doo
dealer.
01-3
Section 01 HOW TO COMMUNICATE
12
B
OVAL,
AITN
:
FAX : 715-847-6869
Date :
Driver Name :
Driver Phone
RAGS,
RADAR RUNS
II Rader
.
.
Dealership Name : Dealer Phone Number :
Vehicle Type :
Odometer Reading : Serial Number:
Race Type :
Class :
Location :
Finish Position :
Temperature :
Altitude : Main Jet :
Surface Conditions :
Top Speed Observed :
RPM Observed :
OPTIONAL :
TRA: Spring :
DRIVEN :
Spring :
Ramps : Cam :
Adjuster Position :
Pre-Load
:
Pins :
CHAINCASE
Top
:
GEARING :
Arm Type :
Bottom :
LIST PROBLEMS OBSERVED AND RECOMMENDED SOLUTIONS OR SUGGESTIONS,
PLEASE INCLUDE SKETCHES :
“Your information is important to us”.
01-4
Section 01 HOW TO COMMUNICATE
MOUNTAIN
HILLCLIMB,
AITN
: Mark Thompson
FAX : 801-752-8249
Date :
Driver Name : Driver Phone Number :
Dealership Name : Dealer Phone Number :
Vehicle Type :
Odometer Reading : Serial Number :
Race Type :
Class :
Location : Finish Position :
Temperature :
Altitude : Main Jet :
Surface Conditions :
Top Speed Observed :
RPM Observed :
OPTIONAL :
TRA : Spring :
DRIVEN :
Spring :
Ramps :
Cam :
Adjuster Position :
Pre-Load :
Pins :
CHAINCASE
Top
:
GEARING :
Arm Type :
Bottom :
LIST PROBLEMS OBSERVED AND RECOMMENDED SOLUTIONS OR SUGGESTIONS,
PLEASE INCLUDE SKETCHES :
“Your information is important to us”.
01-5
Section 01 HOW TO COMMUNICATE
CROSS-COUNTRY, SNO CROSS
ATTN : Bill Rader
FAX : 715-847-6869
Date :
Driver Name :
Driver
Phone Number:
Dealership Name :
Dealer Phone Number :
Vehicle Type :
Odometer Reading : Serial Number:
Race Type :
Class :
Location :
Finish Position :
Temperature :
Altitude : Main Jet :
Surface Conditions :
Top Speed Observed :
RPM Observed :
OPTIONAL :
TRA : Spring :
DRIVEN :
Spring :
Ramps :
Cam :
Adjuster Position :
Pre-Load
:
Pins :
CHAINCASE
Top
:
GEARING :
Arm Type :
Bottom :
LIST PROBLEMS OBSERVED AND RECOMMENDED SOLUTIONS OR SUGGESTIONS,
PLEASE INCLUDE SKETCHES :
“Your information is important to us”.
01-6
Section 02 WHATS NEW FOR 1996
Table of Contents
MX Z 440
m..
,..
,..
.,.
,.,
,,,
,,.
`,,
.,.
,,.
,,m.
.,,
,.,
.,,
,,.
...
.,.
,,.
..,
,..
..,
.,,
..,
,,.
.,,
.,.
.., ...
m
.. ...
.mmmmm.
m.mm.
mm
02-3
MX Z 583
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.
02-3
SUMMIT 670
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.
02-4
FORMULA SS
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.
02-5
SUMMIT 583
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
02-6
FORMULA Ill
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
02-7
FORMULA
SLS
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.
02-8
GRAND TOURING 500 . . . . . . . . . . . . . . . . .
.m.
... ... ...
.m.
m.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
02-8
SUMMIT 500
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.
02-8
GRAND TOURING 580
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.
02-8
FORMULA
STX,
STX LT
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.
02-8
GRAND TOURING SE
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.
02-9
MACH 1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.m.
... ... m.. .. m... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
02-9
FORMULA
SLS
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
02-10
GRAND TOURING 500
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.
02-10
SUMMIT 500
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.
02-10
GRAND TOURING 580
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.
02-10
FORMULA
STX
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.
02-11
FORMULA
STX
LT
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.
02-11
GRAND TOURING SE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
02-11
MACH 1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
.
02-11
02-1
Section 02 WHATS NEW FOR 1996
@
Engine speed at which maximum power is achieved.
BTDC: Before Top Dead Center
@
At 6000 RPM (engine cold) with headlamp turned on. ATDC : After Top Dead Center
@
Force applied midway between pulleys to obtain specified deflection.
PTO : Power Take OFF side
MAG : Magneto side
02-3
Section 02 WHATS NEW FOR 1996
A dot (0) on right indicates changes from
1995
model.
8
0
0
0
4
MODEL SUMMIT 670
Ermine
Tv~e
I
670
Maximum
HP RPM
0
RPM
I
7600-7800
Rotary Valve
P/N
Opening
(BTDC)
/
420924500
Closing
(ATDC)
144°
J
72°
Carburetor Type
PTO
VM 40-81
MAG
VM 40-82
Main Jet
PTO
380
MAG
370
Needle Jet
224 AA -2
Pilot Jet
I
75
Needle Identification
cliD
r30sition
7DP11
-3
Slide Cut-away
2.5
Float Adjustment
mm (in) 19.6 (.77)
Air Screw Adjustment
~
1/16
turn
2.25
Idle %eed
RPM
1800-2000
Gas Grade / Pump Octane Number
(R + M)/ 2 Unleaded /87
Gas / Oil Ratio
Oil
Iniection
Ignition Timing
BTDC
@
mm (in) 1.93 (.076)
Trigger Coil Air-Gap
mm 0.55-1.45
(in)
(.022 - .057)
Gear Ratio
teeth
I
23/44
Engagement Speed
RPM
3800-4000
Drive Pulley Calibration Screw Position
See label on belt guard
Pulley Distance
z
(+
0,- 1) mm
16.5
(+
0,- 1/32 in)
(21/32)
Offset
x
*
().4
mm
35.0
(t
1/64 in)
(1 -3/8)
Y
Dimension Y must exceed X from
1 mm (1/32 in) to 2 mm (5/64 in)
Drive Belt Adjustment
I
Deflection
mm
(in)
I
(1-:;4
)
I
Force@
Iw
(Ibf)
I
6.8 (15)
Driven Pulley Preload
kg
(Ibf)
5.4 to 6.8 (12 to 15)
Drive Chain Tension
Fully tighten adjusting screw by hand then back OFF
only far enough for hair pin installation
Track Adjustment Deflection
mm
45 to 50 (1-3/4 -2)
(in)
with a 7.3 kg (16 lb) downward pull
qNOTE
: See end of specifications for foot notes.
0
Engine speed at which maximum power is achieved.
@
At 6000 RPM (engine cold) with headlamp turned on.
@
Force applied midway between pulleys to obtain specified deflection.
~
H.A.C.
: High Altitude Compensator.
BTDC: Before Top Dead Center
ATDC: After Top Dead Center
PTO: Power Take OFF side
MAG
: Magneto side
02-4
Section 02 WHATS NEW FOR 1996
A dot (o) on right indicates changes from
1995
model.
o
NOTE : See end of specifications for foot notes.
02-5
Section 02 WHATS NEW FOR 1996
A dot (0) on right indicates changes from 1995 model.
o
NOTE : See end of specifications for foot notes.
02-6
Section 02 WHATS NEW FOR 1996
@
Engine speed at which maximum power is achieved.
@
At 6000 RPM (engine cold) with headlamp turned on.
0
Force applied midway between pulleys to obtain specified deflection.
BTDC: Before Top Dead Center.
ATDC: After Top Dead Center.
PTO : Power Take Off side.
CTR : Center.
MAG : Magneto side.
02-7
Section 02 WHATS NEW FOR 1996
02-8
Section 02 WHATS NEW FOR 1996
02-9
Section 02 WHATS NEW FOR 1996
VEHICLE MODEL
FORMULA
GRAND SUMMIT
GRAND
SLS
TOURING 500
TOURING
500
580
ENGINE TYPE
494
494
494
582
Chain Drive Ratio
25/44
23/44
22/44
25144
Chain Pitch
(m)
3/8 3/8 3/8 3/8
Type, Links - Plates
CNy
Sdent
74-11
Silent
72-11
Silent 72-11
Silent 74-11
Drwe
Pulley Type of
Drwe
Pulley
TRAC
TRAC TRAC
TRAC
Ramp Identlflcatlon 287
@
228
=
287
G
228
C)
Cahbratlon
Screw
Poslt!on
or
Cahbratton
DISC
C)uanmy
4
3 5 3
Spring Color
G,een/O!ws Green/Blue P“l.lv.%,e
Ydlmv/Re5
Spring Length
* 1.5 mm
1474
1474
1245
121.1
(+
0060
m)
(5.80)
(5 80)
(4 90)
(4
77)
Clutch Engagement
RPM
4400-4600 4400-4600
4700-4900
3100-3300
Drwen
Pulley Spring Preload
kg (lb)
6.1 -7.5 (13.4 - 16.5)
5.4-
6,8(lJ.9 - 14.9) 61 -7.5 (134 - 165)
5.4-6 8(11 9- 149)
Cam Angle
degree
50” 47” 50”
Pulley Distance Z
(+0,
-1 ) mm
165 165
@
165 165
((+0,
-1/32)
m)
(21/32)
(21/32)
(21/32)
(21/32)
o
Offset
x
*
0.4 mm
350
(* 1/84
m)
350
350
(1-3/8)
350
(1-3/8) (1-3/8)
(1-3/8)
Y-x 10-20
1,0- 2.0
(0.039 -0 079)
1.0- 2.0
10-2.0
(o 039-0 079)
(o 039- 0.079)
(0.039 -0 079)
Drwe
Belt Part Number (P / N)
414860700 414860700
414860700
414860700
Drwe
Belt Width (new)
0
mm
3490
3490
34.90
(m)
(1-3jE)
3490
(1-3/8) (1-3/8) (1-3/8)
Drwe
Belt Adjustment
DeflectIon mm
(m)
(13;4)
(1%4) (1:?4)
(13;4)
Force
@
6.8
(1%
(15)
(%
(%?)
(!:)
Track
Width cm
38.1
(m)
(1:80)
38.1
381
(15.0)
Length
(15.0) (15 o)
cm 307
3455
3455
(m)
(121)
(135 83)
345.5
(135 83)
(136)
Adjustment
DeflectIon mm
45-50 45-50
45-50
45-50
(m)
(1-3/4 - 1-31/32)
(1-3/4 - 1-31/32)
(1-3/4 - 1-31/32)
(1-3/4 - 1-31/32)
Force
@
7,3
(1$8
(16)
;:)
;:)
K?)
Suspension Type
Track
SC1O
%
10
9310
x
!0
Swt
Tw,,ng
Tw,,ng
Tcwrw
Skl
D%
D%
D% 0s4
Length
cm
272
2919
291.9
(m)
302
(107.1)
(1 14.9)
(114
9)
(1 19)
Width
cm
115.6 115.6
(m)
108
(45,5)
1156
(45.5)
(42 5) (45 5)
Height
cm
112 122 112
1283
(In)
(44)
(48)
(44)
(50.5)
Skl
Stance cm
101.6 101.6
1016
(In)
(%
a
~~;~~~ntactArea
(400)
(400)
(400)
211
232
(k!
218
(484)
255
(510)
(479)
(560)
cm2
6503 7227.2
7479,2
(ln~
(1008) (1 120.2)
7479.2
(1 159.2)
(1 159.2)
Ground Contact Pressure
kPa
3.18
315
(Psi)
286
(.461)
334
(
457)
( 415) ( 484)
Frame Material
Alumlnum Alummwm Alummum Alumlnum
Bottom Pan Material
Illwtcm.
UllMct-er
hwaacaxdym
!mpxiew’dwnel
Cab Material
RR(M
RRIM
BRIM
RRIM
Nose
Piece
Material N
A,
NA
NA
N.A
Battery
(A*:
NA
(E)
NA
(;;)
Headllght
w
H4
60/55
H4 60/55 H4 60/55
H4 60/55
jrl
Tallllght
and
Stopllght
w
8t27
8j27
6/27
.%27
+
Tachometer and Speedometer Bulb
w
2x3
2x3
2x3
2x3
Fuel and Temperature Gauge Bulb
w NA NA
NA
3,3
Fuse
Starter
Solenold
A
NA 33
NA
30
Tachometer
A
N.A
NA
NA
N A.
Fuel Tank
u
(US. ga;
(1:06)
421
(1:06)
(1;06) (11
,1)
Chamcase
/
Gearfmx
250 250
(Us
%
250
(85)
250
(8.5)
(85)
(8.5)
Coohng
System
4
(Us. 0$
5.0 5.0
(f5L)
(169)
(169)
(:6:)
InjectIon
011
Reserwr
2.8
(u s
0;
(94.7) (:487)
(:487)
(l:d.7)
02-10
Section 02 WHATS NEW FOR 1996
02-11
Section 03 CHASSIS PREPARATION
SUSPENSION OPERATION / WEIGHT TRANSFER
The purpose of any suspension system is to isolate the rider from the terrain while still allowing for
complete control of the vehicle. A snowmobile rear suspension has the added requirements of
providing weight transfer and maintaining correct track tension.
Weight transfer is essentially the shifting of weight to the track for better traction during accelera-
tion, and to the skis for positive handling during cornering.
The physics that apply to all rear suspensions are basically the same. As we apply torque from the
engine to the drive axle, the torque is transferred to the track and pulls it for forward. That energy
enters the suspension system at the rear axle and tries to pull it forward (force “C” in following
illustration). The rear arm is a pivoting or sliding linkage that only provides vertical forces at the
rear of the chassis, therefore, none of force “C” enters the chassis at the rear arm.
1
+
x
AOIFIVS
1. Drive axel torque
The front arm is mounted with a pivot to both the runners and the chassis. It is through this arm
that the major reaction to the engine torque is applied. As the front arm begins to swivel from the
load of force “C”, it pushes down on the front of the track (force “X” in illustration). This reduces
weight on the skis and applies more weight on the track for better traction. The rest of the force “C”
enters the chassis through the front arm and accelerates the vehicle (force “Z”).
If we keep force “C” constant, we can then vary the size of the vertical and horizontal forces at the
front arm by varying angle “A”. As angle “A” is made smaller, force “X” decreases, and force “Z”
increases. This reduces the amount of torque reaction and more weight stays on the skis. As angle
“A” is increased, force “X” increases. The skis then tend to lift more during acceleration and more
weight is placed on the track.
We can vary angle “A”, within limits, by adjusting the length of the limiter strap. The limiter strap
is just that, a strap to limit the extension of the front of the suspension. Shortening the strap
decreases angle “A” and is what we would do to set up a machine for more ski pressure. For more
track pressure we would want to lengthen the strap to increase angle “A”. The limiter adjustment
has the largest affect on controlling the amount of weight transfer.
03-2
Section 03 CHASSIS PREPARATION
o
NOTE : A shorter nylon limiter strap is available for vehicles equipped with the strap and
bolt style limiter. P / N 486056200.
0
NOTE : Track tension must be checked whenever a major change is made to the limiter
length.
Front arm spring pressure will also affect weight transfer. A stiffer spring and/or more
preload will
transfer more weight to the track. A softer spring and/or less
preload
will keep more weight on the
skis. Springs must also be selected to provide absorption to the intended size of bumps to be
encountered. A soft spring will increase ski pressure but may “bottom out” on large bumps, while
a stiff spring will provide more track pressure but may produce a harsh ride.
o
NOTE : In this and other Ski-Doo texts, we refer to the front arm of the rear suspension
and it’s spring and shock absorber, as the center of the vehicle. The ski suspension is
considered the front of the vehicle and the rear arm of the rear suspension and it’s spring(s) and
shock(s) are indicated as the rear of the vehicle.
Also, think of the center arm as a pivot point. During acceleration the rear arm will want to
compress and the front suspension will want to extend (possibly raising the skis off the ground).
Because of this “pivoting” affect, the rear spring and
preload
will also affect weight transfer ( to a
lesser amount than center arm changes). A softer rear spring and/or less
preload
will allow more
weight transfer to the track and less ski pressure, while stiffer rear springs and /or more
preload
will allow less weight transfer to the track and more ski pressure.
Contrary to popular belief, it is not necessary to have the skis 2 feet off the ground to achieve good
weight transfer. In fact, the energy used to lift the front of the vehicle is not available to push the
vehicle forward.
The main function of the rear arm is to support the weight of the vehicle and rider, yet provide
usable travel to absorb bumps and jumps. The springs are chosen depending on the linkage
design of the rear arm and the intended load to be applied. Stiffer springs will be used on vehicles
intended to carry heavier loads and on vehicles that plan to encounter large bumps, while vehicles
used for lighter loads and on smaller bumps will use softer springs.
Springs for the front suspension are chosen in a similar fashion. A softer spring will provide less
ski pressure and will be used on lighter vehicles while stiffer springs will provide more ski pressure
and be used on heavier vehicles.
o
NOTE : Shock absorber valving and the type of shock used will also affect weight
transfer. Refer to the shock absorber section for details.
03-3
Section 03 CHASSIS PREPARATION
SPRINGS
Generally, 2 types of springs are used on our suspensions. Coil springs and torsional springs.
Refer to following illustration.
5
,
4[
4
Number
3
of coils
2
1
J
I
3
Number
of coils
1
2
Torsional spring
Coil spring
AOOFOOS
1. Wire diameter
2. Free length
3. Wire diameter
4. Opening angle
Several factors are used to determine the characteristics of a spring and they are similar for both
the coil and torsional spring types. Wire diameter, material type, the number of coils and the
physical shape of a spring all determine how a spring will act. Once these characteristics are built
into a spring, they determine the spring rate and the free length in a coil spring or the opening
angle and spring rate in a torsional spring.
03-4
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BOMBARDIER 1996 Ski-doo Formula III User manual

Type
User manual

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