Bos IDYLLE RARE 2014 User manual - Manual (Page 5)

2.2. Coil spring (IDYLLE)
To get the best performance from your Idylle fork, it is necessary to set and occasionally preload the spring rate. By
default, your forks come with the orange spring within. Two extra springs (green and grey) come in the box in order
to adjust to most of the riders.
See the Idylle coil spring setting table below for reference. You may need to install a coil spring having a different
spring rate.
weight (kg/lbs) < 60 kg
< 132 lbs
de 60 à 80 kg
from 132 to 176 lbs
de 80 à 105 kg
from 176 to 231 lbs
> 105 kg
> 131 lbs
spring green orange grey purple
availibility extra origin extra option
Spring Preload
Generally, sag should be set to 15 – 25% of total fork travel (30 to 50mm)
1. The Idylle have an o-ring on the fork upper tube in order to measure the SAG position. Slide the o-ring down
against the scraper lip of the fork dust seal.
2. Dressed to ride, position your bike in dynamic situations (going down the hill for instance). Without
bouncing, mount your bicycle. Assume a normal riding position for at least 30 seconds, allowing the
suspension to fully settle.
3. Dismount your bike without bouncing downward, without further moving the o-ring. Measure the distance
between the seal and the o-ring. This measurement is your sag value.
4. Compare your sag measurement value to the sag recommendations: 30 to 50mm
If your sag measurement value is less than the sag recommendations, turn the preload knob counter-clockwise with
a 14mm wrench. Measure sag again and repeat adjustment if necessary.
If your sag measurement value is greater than the sag recommendations, turn the preload knob clockwise with a
14mm wrench. Measure sag again and repeat adjustment if necessary.
If the preload adjustment is greater than 20 clics, you need to install a coil spring with a stronger rate.
Changing the coil spring
1. With a 32 mm 6-point socket wrench, loosen and remove the preload top cap (top of left leg) (pictures 1 & 2)
2. Remove the black spring guide. (picture 3)
3. Compress the fork slightly and remove the coil spring. (picture 4)
4. Wipe the spring dry with a rag and check the color code.
5. Install the new spring by dropping it into the upper tube.
6. Install the black spring guide, then torque the top cap to 24 N.m.
7. Measure and set sag. Adjust the preload topcap adjustment, if necessary.
1 2 3 4