Bos DEVILLE AM 2014 User manual - Manual (Page 5)

2.2 Hydraulic adjustments
The Deville AM offers suspension adjustments in rebound through a knob and in compression through a lever.
Rebound adjustment is done by rotating the red knob that can be found
at the bottom of the right fork leg.
The number of clicks is counted from the fully closed position while
unscrewing the knob.
Harder = tighten (close) / Softer = untighten (open)
Compression adjustment is done by the position of the red lever at the
top of the right fork leg. This lever has three positions. The total possible lever
movement is 180°; however, the start position may be offset by an angle of about 20° from vertical, as shown in Figure 1.
Figure 1 : Pedaling position H
Figure 2 : Intermediate position M Figure 3 : Comfort position S
The three positions are identified as S (soft), M (medium), and H (hard). The two extremes, S and H are reached at the
fully open and fully closed positions of the lever. The M position is the click when moving between the S and H position, for fast
and intuitive adjustment on the fly.
The advantage of BOS’s adjustments is that they are not based on a single rate curve, i.e. for low speed only. The BOS
adjustments are done based on both the low speed and high speed rate curves.
Therefore, by opting for one of the three positions, the rider is not only changing the low speed compression performance
of the fork, but actually changing the LS and HS curve completely. You can see in the graph below that the relationship between
LS and HS is not constant. The curve’s change is precisely defined to achieve the desired performance. Thus, a single lever controls
all 3 of the settings on the 3-way adjustable Deville (rebound, low-speed and high-speed compression).
Important :
Balancing the air chamber pressure:
It is important to balance the positive and negative chambers to ensure optimum operation of the fork every time you
adjust the pressure.
Proceed as follows:
After adjusting the pressure, cycle the fork slowly 3-4 times on the first inch of travel.
Thus, the air pressure is distributed equally between the chambers, and your fork is ready to roll!
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