© Öhlins Racing AB. All rights reserved.
Any reprinting or unauthorized use without the
written permission of Öhlins Racing AB
is prohibited. Printed in Sweden.
Mounting Instruction YA 676_3 Issued 2008 06 16
These instructions and other documents
can be downloaded from
www.ohlins.com
Mounting Instructions
Kit Contents:
Part no. Pcs.
Shock absorber YA 676 2
C-spanner 00710-01 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 listed below. If
anything is missing, please contact
your nearest Öhlins dealer.
SHOCK ABSORBER YA 676
for Yamaha YFZ 450 - front
Read the Öhlins Owner’s Manual before installing this product
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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
with set-up data
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.
SET-UP DATA
General facts
Shock absorber length 398 mm
Stroke 111 mm
Recommended setting
Compression damping
Low speed 15 clicks
High speed 2 turns
Rebound Damping Adj 20 clicks
Recommended Free sag
Front 60 ± 5 mm
2½ ± ¼ “
Rear 30 ± 5 mm
1 ¼ ± ¼ “
Recommended Ride height
Front 80 ± 5 mm
3 ¼ ± ¼ “
Rear 105 ± 5 mm
4½ ± ¼ “
Short spring position 40 mm
Two springs
The shock absorbers have two springs
working in series. When both springs
are moving, the total spring stiffness is
lower than for each spring separately,
which provides extra progressive and
adjustable spring characteristics.
Between the springs an adjustable sliding
platform adjusts the short spring stroke.
Altering the stroke is a very effective
way of adjusting the spring stiffness
without changing the springs.
INSTALL THE SHOCK ABSORBER
WARNING!
It is advisable to have an Öhlins dealer install the
shock absorber.
WARNING!
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.
1
!
4
WARNING!
Make sure the vehicle is securely supported so
that it will not tip.
3
1
Raise the front end of the vehicle so that
the original shock absorbers are in a neutral
position.
2
Remove the original shock absorbers.
3
Install the Öhlins shock absorbers in the
same positions as the original units. Fasten
the upper attachment first. 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 fit.
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 specific shock absorber kit on the next
page.
3
4
Preload
A
B
A - B = Spring preload
See Set-up data in this folder for
correct preload.
ADJUSTMENTS
WARNING!
When delivered, the Öhlins shock absorber
is dialed to the recommended settings for the
specific brand and make of the motorcycle.
Before riding, always ensure that the basic
settings made by Öhlins are intact.
To set the adjuster:
The turn adjusters have a normal right hand
thread. Turn the damping adjusters clockwise
to fully closed (position zero [0]). Then, turn
counter clockwise to open, and count the
clicks until you reach the recommended
number of clicks. See Set-up data.
Do not use force, delicate sealing surfaces can
be damaged. Handtighten only.
Compression damping adjuster
Adjust on top of the reservoir.
Low speed adjuster: Slotted centre screw.
High speed adjuster: Hexagon screw.
Rebound damping adjuster
Adjust by turning the adjuster wheel
above the end eye.
1
2
3
4
1
2
3
4
Cross
over
Spring preload adjuster
Adjust by moving the upper spring seat
circlip to another groove.
Short spring stroke adjuster
- Cross over
The total spring characteristics can be
adjusted by moving the spring platforms
on the floating sleeve. The spring platform
position decides when the stroke for the
short spring is blocked. At this point, the
total spring stiffness will increase on com-
pression stroke. Lock the spring platforms
using C-spanners.
Spring platform
00154-02
Sleeve
03281-01
Washer
00115-01
Circlip
00131-01
/