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We thank you and congratulate you for choosing BOS products, designed and developed by
enthusiasts, and handmade with care in France.
Please refer to the user manual available in the download section at www.bosmtb.com. It contains
the important safety, maintenance, and warranty information you will need in order to safely install
and use your BOS suspension as well as detailed set-up, tuning, and service information.
Good knowledge of your BOS product will make its day to day usage more enjoyable.
Air pressure
Whatever your weight, the air pressure should be between 100 and 220 psi.
Note : Given pressures are for guidance only. You can adjust it ± 10 psi according to your use and your riding stile
Weight (kg/lbs)
60/132
Recreational Use :
Pressure (psi)
Racing Use :
Pressure (psi)
Balancing air chambers
It is important to balance the pressure of the air chambers after each pressure adjustment to ensure
optimum performance. To do this, compress and slowly release your fork for the first 10 mm of travel
a dozen times.
Starting adjustments: from the fully closed position
Rebound (A) :
Recreational use : 10 clicks
Racing use : 8 clicks
Compression (B) : 3 Positions
-­‐  Soft  :  comfort  
-­‐  Intermediate  :  hydraulic  and  grip  control
(Adjustable  intensity  :  refer  to  the  user    
manual).  
-­‐  Hard  :  pedaling  efficiency  
65/143
120
130
125
135
70/154
75/165
140
150
145
155
Important  :   R efer   t o   t he   u ser   m anual  
for   instructions   to   mount   the   axle.  
This  is  essential  for  your  security.
Handmade in France
80/176
85/187
160
170
165
175
A
B
Quickstart
.
90/198
180
185
Hard

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Summary of Contents for BOS Dizzy

  • Page 1 BOS suspension as well as detailed set-up, tuning, and service information. Good knowledge of your BOS product will make its day to day usage more enjoyable. Air pressure Whatever your weight, the air pressure should be between 100 and 220 psi.
  • Page 2                                         Model  year  2014                         USER  MANUAL        ...
  • Page 3: Warranty

      BOS   MTB   guarantees   to   the   original   purchaser   that   the   BOS   product   for   which   they   received   this   warranty   is   free   from   defects   in   material   and  ...
  • Page 4   1  .  Assembly       Fitting  your  Dizzy  onto  your  bike  requires  care  and  attention.  For  your  safety,  please  follow  these  instructions.     1.1  The  steer  tube     Before  cutting  the  steer  tube,  first  take  some  measurements:  height  of  the  headset,  length  of  the  headtube  of  the  frame,  height  ...
  • Page 5 1.4.  Disk  brake  installation     The  Dizzy  uses  standard  post  mount  160  (PM160)  mount  points.     To  assemble  the  disc  brakes,  follow  this  procedure:    1.  Install  the  disc  brake  caliper  according  to  disc  brake  manufacturer's  specifications.  ...
  • Page 6  called  sag,  can  vary  based  on  your  usage.  This  value  should  be  between  15mm  (smooth  terrain/climbs)  and  20mm   (rough   terrain/downhills)   for   the   100mm   Dizzy   and   between   20mm   (smooth   terrain/climbs)   and   25mm   (rough  ...
  • Page 7: Hydraulic Adjustments

    2.2  Hydraulic  adjustments     The  Dizzy  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.    ...
  • Page 8 The  H  position  considerably  stiffens  the  fork  in  an  effort  to  limit  suspension  oscillations  during  pedaling,  but  without  locking  out   the  fork  completely.  Thus,  BOS  remains  faithful  to  the  principle  of  keeping  an  active  fork,  even  in  its  restrained  state.  This  allows  ...
  • Page 9  and  the  seals.     The  Dizzy  uses  a  closed  damper  and  so  the  oil  changes  must  be  done  at  a  BOS  MTB  service  center.  This  oil  change  is  done  at  the   same  time  as  the  full  fork  rebuild.    ...
  • Page 10 The  fork  comes  with  a  slightly  play  on  stanchions  area,  what  should  I  do?   The  unique  alignment  of  the  bushings  of  the  BOS  forks  creates  a  slight  frontal  play.  If  the  play  is  abnormally  high,  please  contact   a  BOS  approved  service  center  for  expertise.  ...