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5

Checking front ride height

A

Put your bike on a stand.
Arrange the stand so that the front wheel
is off the ground and the front fork fully
extended.
Measure the distance between the up-
per fork crown and the front wheel axle,
fig 4 distance A. Make a note of the
measurement.

B

Race dressed sit on the bike, straight
above the foot pegs, with the feet barely
touching the ground.
Have somebody to measure between
the same point as before, fig 4 distance
C.

C

The difference of the two measurements
should be 50 

±

 10 mm.

CAUTION!

Do not try to alter ride height by alter-
ing the spring preload. New springs
are needed.

D

If you need to change the springs, see
“Changing springs“ on page 9.

E

Stiffer springs are needed if the differ-
ence is 

more

 than 60 mm.

Softer springs if the difference is 

less

than 40 mm.
Consult your Öhlins dealer for the right
rate.

Checking rear ride height

A

Put your bike on a stand. Arrange the
stand so that the rear wheel is off the

ground and the rear suspension fully
extended.
Measure the distance between the rear
wheel axle and a point near the rear end
of the seat, for example a seat bolt, fig 4
distance A.
Make a note of the measurement.

B

Race dressed sit on the bike, straight
above the foot pegs, with the feet barely
touching the ground. Have somebody
to measure between the same point as
before, fig 4 distance C.

C

The difference of the two measurements
should be 115 

±

 10 mm.

CAUTION!

Do not try to alter ride height by alter-
ing the spring preload. A new spring
is needed.

D

A stiffer spring is needed if the differ-
ence is 

more

 than 110 mm.

A softer spring if the difference is 

less

than 90 mm.
Consult your Öhlins dealer for a spring
of the right rate.

Should you still experience excessive

bottoming or that the bike feels much
to stiff and suspension travel is not fully
used, harder/softer than normal springs
may be needed for the track you are
testing on.
Consult your Öhlins dealer for advice!

Fine-tuning the bike

Learning how to use the adjusters will
take time but you quickly appreciate
them once you know the tricks. Even

the specialists sometimes need a
specialist!

With the adjusters you optimize the

suspension for your riding style and the
track you are competing on.

The same basic guide lines goes for

both the front fork and the rear shock
absorber.

Too much compression damping will

give you a harsh ride as your bike
“jumps“ along the track.

With too much rebound damping your

bike will have difficulties with several
bumps in a row. The suspension will not
extend fast enough between bumps,
your bike will ride lower and lower and
eventually the suspension will bottom!

External adjusters

On the Öhlins front fork the adjusters
are bleed valves, totally separated from
each other.

The compression bleed valve controls

the flow in the cartridge tube during the
compression stroke, the rebound bleed
valve the flow during the rebound stroke.

CAUTION!

Using too much force when closing
the adjusters will destroy important
sealing surfaces.

Both the adjusters have a normal 

right-

hand

 thread.

Click position zero (0) is when the ad-
justers are turned 

clockwise

 to fully

closed.
The adjustment range, from fully
closed until maximum open valve
(anticlockwise), is 20 clicks.
In order not to click in the wrong di-
rection; always first close the adjuster,
then dial-in the new setting.

Setting up the bike

4.
Checking sag and ride height.

Front sag:
A - B = 30 

±

 10 mm.

Front ride height:
A - C = 50 

±

 10 mm.

Rear sag:
A - B = 35 

±

10 mm.

Rear ride height:
A - C = 100 

±

 10 mm.

A: Fully extended.

B: On the ground.

C: Rider on.

A: Fully extended.

B: On the ground.

C: Rider on.

Summary of Contents for FG 012 GasGas

Page 1: ...1 Owners manual hlins motocross front forks FG 012 GasGas Including Setting up your bike Fine tuning Service the fork General handling set up Technical info Spare parts tools...

Page 2: ...garding proper installation procedures contact an hlins dealer or other qualified person 3 The vehicle service manual must be referred to when installing the hlins front fork hlins products are subjec...

Page 3: ...an any other brand over 80 titles A well equipped network of author ised hlins service centres around the world with specially trained me chanics can help you with person ally tuned settings service r...

Page 4: ...ou some ba sic guidelines how to set up your bike with your new hlins front fork However remember that the front fork is just one part of your motorcy cle and to get the fork to work prop erly the who...

Page 5: ...experience excessive bottoming or that the bike feels much tostiffandsuspensiontravelisnotfully used harder softerthannormalsprings may be needed for the track you are testing on Consult your hlins de...

Page 6: ...vement go back to what you started with and double check to be sure Payattentiontochangesincon ditions like tires temperatures etc In general compression damping changes should be used to influence th...

Page 7: ...e compression damping Decrease the spring preload Clean the oil seals and scrapers Use hlins grease 148 01 for regreasing F Canhandlethefirstinaseriesofbumps but feels hard after a few more bumps Fron...

Page 8: ...screw the top cap use a 24 mm wrench 2 Put a box under the front wheel so that the springs are visible Remove the top cap from the damper rod extender Use a 16 and 24 mm wrench Remove the spring suppo...

Page 9: ...ort the preload washer and the spring For free spring length see technical information on page 13 7 NOTE Closing the compression and the rebound valves will keep the damper rod extended making it easi...

Page 10: ...gs are located The first bushings is located at the bottom end of the outer leg the sec ond approximately 150 mm further up the leg Between them is a sleeve to main tain the distance 12 Use the specia...

Page 11: ...rder on the bench Inspect all parts for wear and damage replace if necessary Clean all parts thoroughly Assemble the compression valve Assembling 16 Apply a thin layer of hlins green grease 148 01 on...

Page 12: ...topcapandthelocknut Tighten the top cap and the lock nut against each other use a 16 and 24 mm wrench Fit the fork legs on the motorcycle For tightening torques please see your bike s work shop manual...

Page 13: ...evel See mounting instruction for recommended oil level Adjustment range 90 130 mm CAUTION Use only hlins high performance front fork fluid No 5 1305 01 Loctite glue 542 for fork bottom thread and car...

Page 14: ...9 02021 01 4 Bushing lower 10 02325 01 2 Sleeve 11 02332 03 2 Cover Sticker hlins 12 01552 01 2 Washer 13 02336 01 2 Seal 14 02015 01 2 Circlip 15 02014 01 2 Scraper 17 02339 01 2 Cylinder tube cartri...

Page 15: ...27 02322 01 2 Spring 28 02320 03 2 Piston holder 29 00530 18 8 Shim washer see spec card notes 30 01149 01 6 Wave washer see spec card notes 31 Shims see spec card notes 32 02335 01 2 Rebound piston...

Page 16: ...ex More info www ohlins com The ultimate suspension site Find out everything about your suspension Download mounting instructions manuals and brochures And a lot more hlins Racing AB Box 722 S 194 27...

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