Owners Manual
Mounting instruction Öhlins front fork kit
FG 831 for Honda CRB 900 Fireblade
Rebound damping
adjuster
Compression
damping adjuster
Öhlins front fork 43
Your Öhlins front fork 43 is an upside down type
front fork featuring the following adjusters.
Compression damping adjuster
Adjustments are made at the bottom of the front
fork leg. Use a 3 mm allen key.
Rebound damping adjuster
Adjustments are made at the top of the fork leg.
Use a 3 mm allen key.
Spring preload adjuster
Adjustments are made by turning the nut at the
top of the fork leg. Clockwise for harder adjust-
ment, counter clockwise too release the preload.
Use a 17 mm wrench.
NOTE!
When delivered the Öhlins front fork is dialed to
recommended settings for the specific brand and
make of the motorcycle. If you have changed the
setting check like this:
The adjusters have a normal right hand thread. Turn
the damping adjusters clockwise to fully closed (pos.
zero [0]). Turn counter clockwise to open and count
the clicks until you reach the recommended number
of clicks. See Setup data at page 4.
CAUTION!
Do not use to much force, delicate sealing
surfaces can be damaged.
Spring preload
adjuster
Bike on a stand.
F1
R1
Bike on the ground.
F2
R2
Bike with rider on.
F3
R3
Set-up data:
Lenght 720 mm
Stroke 120 mm
Rebound adjustment 12 clicks
Compression adjustment 10 clicks
Spring pre-load 10 mm
Spring rate 9.5 N/mm
Oil level 85 mm
Checking sag and ride height
Front suspension
F1. Bike on a stand with the
suspension fully extended = ............
F2. Bike on the ground without rider = ............
F3. Bike on the ground with rider = ............
Free sag
F1 - F2 = ............
Ride height
F1 - F3 = ............
Rear suspension
R1.Bike on a stand with the
suspension fully extended = ............
R2.Bike on the ground without rider = ........... .
R3.Bike on the ground with rider = ............
Free sag
R1 - R2 = ............
Ride height
R1 - R3 = ............
NOTE!
If ride height is higher than recommended,
softer spring/springs must be used.
If ride height is lower than recommended,
harder spring/springs must be used.
Contact your Öhlins dealer for advice.
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
Part No. FG 831. Issued 02 04 17
Before installation
Öhlins Racing AB can not be held responsible for
any damage whatsoever to front fork 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 front fork, 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 front
fork. 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 front
fork 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 front fork
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, especially
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
front fork.
Kit contents
Before installing the front fork, 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.
Fork legs (pair) 1 01676-13
Caliper bracket LH 1 01677-13
Caliper bracket RH 1 01677-14
Fender bracket ring 2 01682-05
Fender bracket LH 1 01682-15
Fender bracket RH 1 01682-16
Fender bracket 2 01686-05
Bolt M4x14 4 01046-10
Screw M4x12 4 00382-04
Screw M5x25 4 05323-02
Nut M5 4 00430-04
Shaft sleeve 1 01687-03
Wheel axle screw 1 01691-02
Wheel axle spacer 1 01691-03
Shaft cap 1 01680-05
Sticker Öhlins 2 00194-10
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 ab-
sorber.
3. When working on a lifted vehicle it must be
securely supported to prevent it from falling.
Mounting instruction
1
Put the bike on a stand so that the front wheel
has ground clearance. Make sure it is steadily
positioned and will not fall over.
2
Release the brake caliper on each side and let
them hang by the brake hoses.
3
Remove the front wheel by loosening and pull-
ing the shaft out.
4
Remove the front fender.
5
Release the fasteners of the front legs in the lower
triple clamps and upper triple clamps.
6
Pull the fork legs out downwards and fit the Öhlins
fork legs. Fit them to the triple clamps. Do not
tighten until the legs are in correct posistion, see
Note!
NOTE !
The fork legs are to be mounted so that the sec-
ond groove is just visible above the edge of the
triple clamp.
7
First tighten the upper triple clamp, then the lower
one, to the correct torque. Refit the clip-on han-
dlebars. See the motorcycle's Workshop Manual.
CAUTION!
Do not overtighten. The legs may be deformed
and cause malfunction
8
Fit the brake caliper brackets with the screws
supplied.
8
NOTE!
Make sure that all bolts are tightened in correct
torque and that nothing restrains the front fork
when the suspension is being compressed.
Check with the Workshop manual of the motor-
cycle.
21
Continue your work according to the Owners
manual, section Adjustments.
5 Nm
7 Nm
25 Nm
5 Nm
20 Nm
9
Fit the circlip model flexible fender bracket by
first pressing it over the lower fork leg.
10
Then open it slightly so it can be slided to the
fork bottom.
11
Bolt the fender bracket to the brake caliper
bracket and fit the two forward fender brackets.
12
Fit the sticker to the fender bracket.
9
11
10
12
13
Fit the front fender.
14
Fit the sleeve to the right fork bottom.
15
Refit the wheel and the front wheel shaft together
with the wheel shaft spacer.
16
Fit the wheel axle screw. Do not tighten yet.
17
Fit the shaft cap to the left fork bottom.
18
Fit the brake calipers on both sides.
19
Lower the motorcycle. Use the brake on the front
wheel and push the front suspension down two
or three times. This will put the fork legs in a
parallell position.
NOTE!
Another way to align the front legs is to rotate
the wheel as fast as possible and bring it to a
sudden stop by braking. This will also bring the
legs to the correct position.
20
Tighten the wheel shaft and shaft clamps so the
fork legs are in a fixed position. See the Work-
shop manual.
17
15
16
14
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