RockShox 1999 Jett XC Manual Del Propietário página 5

the crown. The upper tubes, on clamp type crowns, must not extend above the crown more than 1mm.
8. Hangerless Reflector Bracket Installation: Orient black reflector bracket to the front of the
fork with the 90 degree bend under the fork brace. Place the .040" thick flat washers onto the hex bolt
and insert this assembly through the lowest oval hole in the bracket and through hole in brace. Place
star washer and thread nut onto bolt at back of brace. Torque to 60 in-lb. (6.8Nm).
Hangered Reflector Bracket Installation: Orient the black reflector bracket with the hook
of the bracket facing up and to the fork brace. Place the star washer onto the hex bolt and insert the
bolt, with star washer, through the rear hole on the hook of the bracket. Thread the bolt through the
hole on fork brace. Torque to 20in-lb. (2.3Nm).
Tuning Your Fork
RockShox Jett XC forks can be tuned to your particular weight, riding style, and terrain. Our forks are set up
for the 140 to 180lb (65 to 80kg), all-around rider who spends equal time riding every off-road terrain
imaginable. Because you're probably not that rider, you can benefit by making tuning adjustments to suit
your specific needs. For maximum tuning flexibility spring tuning kits are available.
When tuning suspension, always make one change at a time and write it down. Keeping a record lets you know
what changes you have tried and suggests what changes you might try. Ask a shop or local riders what they
have found works well. These resources are typically your best bet, but don't hesitate to call RockShox about
specific tuning needs. A list of phone numbers is on Page 17.
R H S
IDE EIGHT AND
Jett XC is designed to compress (sag) when you are sitting on the bike. This sag allows the front wheel to stay
in contact with the ground when braking and cornering over rough and uneven terrain. The optimum
settings are12 to 16mm sag for 63mm travel and14 to 18mm for 75mm travel.
Changing the preload alters the sag and firmness of the initial fork movement. To measure sag, slide the fork
boot up out of the way and install a zip tie on the upper tube so that it is flush against the Resi-wiper seal; sit
on the bike with normal riding apparel; then step off your bike and measure the bottom of the zip tie to the
top of the wiper. This measurement is the amount of sag. For example, heavier more aggressive riders need
more spring preload to maintain proper ride height and allow more of the fork's travel to be used during bump
impact.
To Change Preload: The top cap adjustment knob on each leg adjusts the sag of the fork (the preload on the
spring stack). When the adjustment knobs are turned full clockwise, the fork will sag the least and be the
firmest. Turning the adjustment knobs full counterclockwise makes the fork sag the most and be the softest.
I : DO NOT P A
MPORTANT TURN THE RELOAD
FIVE FULL TURNS FROM MINIMUM TO MAXIMUM PRELOAD
RESULT IN PREMATURE FAILURE OF THE PRELOAD ADJUSTER CAP ASSEMBLY
Quick Tip: Right and left side is determined when straddling the bicycle frame facing forward
O S
VERALL PRING
You want the fork to occasionally bottom out. If you are bottoming out too often or not using all the available
P 8
AGE
P A
PRING RELOAD DJUSTMENT
. T
DJUSTERS PAST THEIR LIMIT STOPS HERE ARE APPROXIMATELY
. F
AILURE TO OBSERVE THIS INSTRUCTION COULD
.
R A
ATE DJUSTMENT
PN 950-001827-00, R
travel then the overall spring rate should be changed.
Change the coil springs with ones of a higher or lower rate to alter the overall spring rate. The table below
indicates rider weights and the recommended spring kits for those weights. You may purchase kits through
your dealer.
T
O CHANGE COIL SPRINGS
1. Unscrew the top cap assemblies using a 24mm open-end wrench or socket.
2. Compress the fork fully and slowly remove the spring stack assemblies (top cap, spring spacer and coil
spring). See Fig. 2.
I : T
MPORTANT AKE CARE NOT TO LOSE OIL
3. Remove the spring spacer from the coil spring. To do this, pull the coil
spring from the spring spacer. Inspect the o-ring on the spacer and
replace if necessary.
4. Replace the springs with softer or firmer rated coil springs and
reassemble the spring stacks.
5. Install the cleaned and greased spring stack assemblies in the top of
the upper tubes, starting top cap threads by hand. Do not cross thread.
Tighten the top caps until they are flush with the upper tubes.
6. Using a 24mm socket and beam-style torque wrench, torque the top cap assemblies to 30 to 40in-lb
(3.4 to 4.5Nm).
7. After riding you may need to adjust the top cap knobs to obtain the correct sag/preload feel (see above).
A
PN 950-001827-00, R
EV
C C S R
HANGING THE OIL PRING ATE
:
. K - .
EEP THE FORK UP RIGHT
S R C
PRING ATE OLOR
Soft Yellow
Medium Red
Firm Black
A
EV
Fig. 2
P 9
AGE