Owners Manual
Installation instructions Öhlins shock absorber kit
YA 331 for Yamaha SX-R Viper, center
© Öhlins Racing AB. All rights reserved. Any reprinting or unauthorized use without the
written permission of Öhlins Racing AB is prohibited. Printed in Sweden.
Öhlins shock absorber type 46 HRX
Adjusters
Your Öhlins shock absorber type 46 HRX features the
following adjusters:
Compression damping
Adjustments are made on top of the reservoir.
Low speed adjustments: Slotted centre screw.
High speed adjustments: Hexagon screw.
Rebound damping
Adjuster wheel on the piston shaft above the end
bracket.
Spring pre-load
Adjustment made by nuts on cylinder tube.
Use C-spanner.
When delivered, the Öhlins shock absorber is dialed to
recommended settings for the specific brand and make
of the snowmobile. If you have changed the setting,
check like this:
The adjusters have a normal right hand thread. Turn
clockwise to fully closed. Turn counter clockwise to open
and count the clicks until you reach the recommended
number of clicks.
Do not use to much force, delicate sealing surfaces
can be damaged. Use fingers only.
Spring
pre-load
adjuster
Rebound
damping
adjuster
Compression
adjuster
High speed
compression
adjustment
Low speed
compression
adjustment
Öhlins Racing AB, Box 722, S-194 27 Upplands Väsby, Sweden.
Phone +46 8 590 025 00. Fax +46 8 590 025 80.
www.ohlins.com
YA 331, issued 02 10 25
Setup data
Length 329.5 mm
Stroke 89.5 mm
Rebound adjustment 15 clicks
Compression adjustment 16 clicks
High speed comp. adj 1
1
/
2
turns
Preload 0 mm
Free spring length 190 mm
NOTE!
The adjustments must be carried out on a flat sur-
face with the snowmobile preferably being indoors,
so that the vehicle is not cold and the suspension
runs easily.
Rear ride height and suspension comfort
It is very important that the rear ride height is
adjusted correctly. Due to the coupling device in
the rear suspension, the rear ride height and com-
fort are linked together. If the ride height is not
within the right range, the center and rear shock
absorbers may start working parallel in unwanted
situations, thus creating a too stiff suspension
and a harsh ride.
NOTE!
The spring pre-load affects the ride height, it does
not affect bottoming.
It might be necessary to increase the rebound
damping somewhat when using more spring
pre-load than the delivered setting.
If you experience the suspension bottoming out
too often, do not increase spring pre-load. It will
not fix your problem, and your ride height might
make your coupling adjuster run out of the range
described above, thus creating a harsh ride. In-
stead, change to a stiffer spring and again ad-
just your spring pre-load as described above.
If you experience that the suspension is too stiff,
do not decrease spring pre-load. It will not fix your
problem, and your ride height might make your
coupling adjuster run out of the range described
above, thus creating a harsh ride. Instead, change
to a softer spring and again adjust your spring pre-
load as described above.
Equal distance
Recommended rear ride height
When you sit on the snowmobile in riding posi-
tion, wearing all your riding gear, we recommend
the coupling adjuster free play to be equal in both
directions (see fig.), assuming that the coupling
adjuster is in its standard setting.
Increase or decrease the spring pre-load until you
have reached the middle position of the coupling
adjuster.
Of course, if you carry heavy luggage, or a pas-
senger on a 2-seater, you will need to do this
adjustment with these in place.
Before installation
Öhlins Racing AB can not be held responsible for
any damage whatsoever to shock absorber or
vehicle, or injury to persons, if the instructions for
fitting and maintenance are not followed exactly.
Similarly, the warranty will become null and void
if the instructions are not adhered to.
WARNING!
1. Installing a shock absorber, that is not
approved by the vehicle manufacturer, may
affect the stability of your vehicle. Öhlins
Racing AB cannot be held responsible for
any personal injury or damage whatsoever
that may occur after fitting the shock
absorber. Contact an Öhlins dealer or other
qualified person for advice.
2. Please study and make certain that you
fully understand all the mounting instructions
and the owners manuals before handling this
shock absorber kit. If you have any questions
regarding proper installation procedures,
contact an Öhlins dealer or other qualified
person.
3. The vehicle service manual must be
referred to when installing the Öhlins shock
absorber
Safety signals
Important information concerning safety is
distinguished in this manual by the
following notations:
The Safety alert symbol means:
Caution! Your safety is involved.
WARNING!
Failure to follow warning instructions
could result in severe or fatal injury
to anyone working with, inspecting or
using the suspension, or to bystanders.
CAUTION!
Caution indicates that special pre-
cautions must be taken to avoid dam-
age to the suspension.
NOTE!
This indicates information that is of
importance with regard to procedures.
Öhlins products are subject to continual improve-
ment and development. Consequently, although
these instructions include the most up-to-date
information available at the time of printing, there
may be minor differences between your suspen-
sion and this manual. Please consult your Öhlins
dealer if you have any questions with regard to
the contents of the manual.
NOTE!
During storage and transportation, espe-
cially at high ambient temperature, the oil
and grease used for assembling may run out
inside the packing and damage the
expanded polystyrene packing material. This
is not unusual and is in no way detrimental
to the shock absorber.
Kit contents
Before installing the shock absorber, please
check the contents of the kit, listed on the front
page of this instruction. If anything is missing,
contact your Öhlins dealer.
Description Pcs. Part No.
Shock absorber 1 YA331
C-spanner 1 00710-02
Washer 8.4/16/1.5 2 00153-01
Tie-rap 4 00231-01
Nut M8 2 00430-05
Bolt M8x35 2 00432-01
Sticker "Öhlins" 2 00197-01
Sticker "Memo notes" 1 01180-01
Owners Manual 1
Notes
WARNING!
1. It´s advisable to have an Öhlins dealer or other
qualified person to fit your shock absorber.
2. Instructions in the vehicle service manual are
to be followed when changing the shock
absorber.
3. When working on a lifted vehicle it must be
securely supported to prevent it from falling.
Mounting instruction
1
Loosen the screws, on the control rod on both
sides of the snowmobile. Unscrew the screws
approximately 15 mm, it is not necessary to re-
move them.
1
Screw attached to
control rod
5
2
Lift the rear end of the snowmobile so the rear sus-
pension has ground clearance. Make sure it is
steadily positioned and will not fall down.
3
Loosen the limiter straps around the cross member.
4
Loosen and remove the upper and lower shock
absorber bolts. Remove the stock shock absorber.
CAUTION!
It is vital that the reservoir of the rear shock absorber
is turned to the right side. If not, the reservoirs of the
centre and rear shock absorbers will collide.
5
Install the Öhlins shock absorber. Route the hose
as shown in the illustrations.
Notes
8 mm holes
Left side slide
Nut
Washer
Slide
Bolts shall
be mounted
from the
outside of
the slide
7
Reservoir
Pull rod
6
The reservoir shall be mounted to the left sliding
rail. Two holes (Ø 8 mm) must be drilled accord-
ing to the illustration.
7
Use nuts, screws and washer provided.
6
CAUTION!
The reservoir must be turned against the rail so that
only a narrow gap (2-3 mm) remains. Check that
the reservoir and the pull rod do not interfere with
each other when the suspension is compressed.
See fig. below.
8
Tie-raps
Reservoir
Hose
Cross
member
Tie-rap
Limiter
strap
9
8
Fix the hose to the spring with two tie-raps.
9
Fix the hose to the cross member with two tie-
raps, so that the tie-raps cross each other.
10
Tighten the screws of the control rods, on both
sides of snowmobile. Set the limiter strap to the
standard length.
11
Check that the spring holds the upper spring
retainer with some pressure. If not, increase the
pre-load with the ring nuts.
NOTE!
Make sure that all bolts are tightened to the correct
torque and that nothing fouls or restricts the move-
ment of the shock absorber when the suspension
is being fully compressed or extended.
12
Continue your work according to the Öhlins Owners
Manual, section Settings.
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