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Adjusting Ahead-set headsets
All Porsche Bikes feature an Ahead-set headset. With
Ahead-set headsets, the stem rests on the fork shaft
and is clamped onto it. The stem clamp secures the
headset setting.
To adjust your Ahead-set headset, you will need an
M4/M5 Allen key, Torx T25 [ Bike RX/RS] and a torque
wrench.
Open the stem clamp on the side by turning it around
once or twice. You can now adjust the headset in the
headset cover using the Allen screw.
Check the headset play by repeating the process
described at the beginning of this chapter until
the play has been set properly. Use an M5 Allen
key for this.
Once the play has been set correctly, align the stem
with the front wheel. Tighten the clamping screws
in the stem by applying the designated tightening
torques.
Only specialists should adjust the headset.
Have the headset adjusted by a bike specialist.
Risk of damage to the headset bearing if set too
tight.
Carefully adjust the headset play in quarter
revolutions. Do not in any case excessively tighten the
screw.
Loose stem. A loose stem may cause a crash.
Check to make sure the stem is securely positioned by
holding the front wheel between your legs and turning
the handlebars. The handlebars must not twist in the
process.
PLEASE NOTE
PLEASE NOTE
WARNING
INFORMATION
Suspension fork
Your Porsche Bike RX and Porsche Bike is fitted with
a suspension fork to provide you with the greatest
possible comfort and safety on different surface condi-
tions. Impact on the wrist joints caused by uneven
surfaces is reduced significantly and your bike is
noticeably easier to control on rough stretches or in
the countryside. Impacts caused by rough terrain
are generally transmitted to a spring element integrated
in the left-hand fork leg [ when viewed in the direction
of travel ]. To ensure optimum performance from the
suspension fork, you need to adjust the suspension
fork to your body weight and your style of riding.
Positioning the DT Swiss XMM Fork
You can continuously adjust the suspension stiffness
by regulating the air pressure. Undo the cap on the
left-hand fork leg and attach a suitable air pump to the
air valve.
Positioning the SR Suntour NCX D-Lo Fork
You can adjust the suspension stiffness by regulating
the spring pre-load. To do so, turn the cap on the
left-hand fork leg; the overall adjustment range com-
prises around 15 clicks. You can increase the spring
pre-load by turning in a clockwise direction and
reduce it by turning in an anti-clockwise direction.
Negative spring travel
The fork should compress about 10 – 20 % when you
sit on your bike. Use a cable tie or ask someone to
help you to measure how far the suspension fork
compresses when you sit on the bike.
Attach a cable tie around one of the fork legs.
To do so, you first need to remove any load from the
fork. Push the cable tie onto the very bottom of the
plunger tube. Now mount your bike. The fork will now
compress and the cable tie is pushed upwards. You
can thus measure the spring travel quickly and easily.
If the suspension fork compresses too much, increase
the spring pre-load to the specified level.
Excessive air pressure.
Never fill your suspension
fork with a compressor or an air pump not specifically
designed for this purpose as these may cause exces-
sive pressure levels. Always use special damper/sus-
pension fork pumps.
WARNING
INFORMATION
Risk of damage to the stem and fork shaft.
Please observe the prescribed tightening torques.
Headset
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