Öhlins Racing AB
Box 722
S-194 27 Upplands Väsby, Sweden
Phone +46 8 590 025 00
fax +46 8 590 025 80
© Öhlins Racing AB. All rights
reserved. Any reprinting or
unauthorized use without the written
permission of Öhlins Racing AB
is prohibited.
www.ohlins.com
Öhlins products are subject to
continuous improvement and
development, therefore, although
these instructions include the most
up-to-date information available at
the time of printing, minor updates
may occur.
To find the latest information contact
your Öhlins distributor. Please
consult your Öhlins dealer if you
have any questions regarding the
contents in this document.
Shock Absorber for ATV Yamaha YFZ 450R Front
YA 971
Mounting Instructions
Part No Pcs
Shock absorber YA 971 2
C-spanner 00710-01 2
Stop washer 00115-01 2
Spring clip 00116-03 2
Circlip 00131-01 2
Spring platform 00154-02 4
Support sleeve 00417-02 2
Sleeve 03281-01 2
Öhlins Sticker 00197-01 2
Memo Notes Sticker 01180-01 1
Owner’s Manual ATV 07235-01 1
Before installing this product, check the
contents of the kit. If anything is missing, please
contact your nearest Öhlins dealer.
Kit Contents
Recommended set-up
Rebound damping 20 clicks
Compression damping
Low speed 15 clicks
High speed 1½ turns
Shock absorber data
Length 462 mm
Stroke 140 mm
Free sag and Ride height
Free sag, front 60±5 mm
2½±¼’’
Free sag, rear 30±5 mm
1¼±¼’’
Ride height, front 80±5 mm
3¼±¼’’
Ride height, rear 105±5 mm
4½±¼’’
Set-up Data
Please note that during storage and
transportation, especially at high ambient
temperature, some of the oil and grease used for
assembling may leak and stain the packaging.
This is in no way detrimental to the product,
wipe off the excessive oil/grease with a cloth.
Part no. YA971_0
Issued 2008-12-15
Warning!
Before installing this product, read the Öhlins
Owner’s Manual. The shock absorber is an
important part of your vehicle and may affect the
stability.
Rider’s weight A-arm: Standard A-arm: Standard Mount +2’’
75kg /165Lb Long spring 06390-03 Long spring 06390-04
Spring rate Prog 18-27 N/mm Spring rate Prog 21-30 N/mm
Short spring 4060-40 Short spring 4060-40
Spring rate 40 N/mm Spring rate 40 N/mm
85kg /187Lb Long spring 06390-04 Long spring 06390-05
Spring rate Prog 21-30 N/mm Spring rate Prog 24-33 N/mm
Short spring 4060-40 Short spring 4060-40
Spring rate 40 N/mm Spring rate 40 N/mm
95kg /209Lb Long spring 06390-05 Long spring 06390-06
Spring rate Prog 24-33 N/mm Spring rate 27-36 N/mm
Short spring 4060-40 Short spring 4060-40
Spring rate 40 N/mm Spring rate 40 N/mm
Total spring preload: 4 mm Total spring preload: 4 mm
Cross-over 18 mm Cross-over 18 mm
Spring Guide
1 2
Install Spring How to install
Note!
Before installing the shock absorber, make sure
that the correct spring is installed.
Warning!
It is advisable to have an Öhlins dealer install the
shock absorber.
When installing, consult your Vehicle Service
Manual.
1
Raise the front end of the vehicle so that
the original shock absorbers are in a neutral
position.
Warning!
Make sure the vehicle is securely supported so
that it will not tip.
2
Remove the original shock absorbers.
3
Install the Öhlins shock absorbers in the
same positions as the original units. Fasten
the upper attachment rst. The piggy back
reservoirs should be at the top and facing
outwards.
4
Fasten the lower attachment. Raise or lower
the wheels slightly to make the attachment t.
1
Note!
Before you install the shock absorber on the
vehicle you need to install the correct spring.
See spring guide in this manual.
1
Insert the circlip (00131-01) in the correct
groove.
Groove No 1
Groove No 2
and so on...
2
Install the short and long springs, the
surrounding parts but not the spring clip
(00116-03).
3
Measure the free length of the springs and
surrounding parts (without the spring clip
00116-03) according to g. 3 (A).
4
Install the spring clip (00116-03) and, again,
measure the length of the springs and
surrounding parts according to g. 4 (B).
5
Set the short spring stroke position - “Cross
over” according to the Spring Guide in this
folder.
Circlip 00131-01
Washer 00115-01
Short spring
Spring platform
00154-02
Long spring
Spring clip
00116-03
Sleeve 03281-01
Support sleeve
00417-02
2
3
4
Preload
A
B
A - B = Spring preload
Adjust the total preload by moving the
upper spring seat circlip (00131-01)
to another groove. See Set-up data in
this folder for correct preload.
4
3
5
Tighten the attachment screws to the correct
torque. Consult your ATV Owners manual.
6
Check sag and ride height according to the
Öhlins owners manual. See also Set-up data
for this specic shock absorber kit on the
next page.
Caution!
Make sure that all screws are tightened to the
correct torque and that nothing fouls or restricts
movement of the shock absorber when the
suspension is fully compressed or extended.
Adjustments
Rebound
Damping Adjuster
Warning!
Before riding, always make sure that the
basic settings made by Öhlins are according
to recommended Set-up Data. Read about
adjustments and setting up in the Öhlins
Owner’s Manual before you make any
adjustments. Contact an Öhlins dealer if you
have any questions about setting up the shock
absorber.
Spring Preload
Adjuster
Compression
Damping Adjuster
- Low speed
- High speed
/