setting up a DHX 5.0 on a cove g-spot

lachoman
lachoman Posts: 371
edited July 2008 in MTB workshop & tech
I got my g-spot recently, and it's my first full sus, so therefore the first time i've set up a shock. As i understand, the red dial at the bottom is rebound damping, the propedal is low speed(?) compression damping, the preload is simply the turning of the spring. I have no idea what the bottom out adjuster or the schraeder valve are for though! can anybody advise me on setting up the shock nicely, and tell me what these two adjustments do? Many thanks.
<hr noshade size="1">You bend it, you mend it.

Comments

  • nicklouse
    nicklouse Posts: 50,673
    set your sag. add air between the pressures stated and tweek the knobs till you get it like you want.

    Please note only 2 turns on the collar for preload. if you can not get the correct sag with the current spring change it.

    Also read the manual.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • lachoman
    lachoman Posts: 371
    The pressure is 75-200psi, this is quite a big range. What does the air pressure actually do? Knowing that will allow me to set the air pressure to my liking. Is that 2 turns from when the spring is at full length? No manual, anywhere i can get it on the web? Couldn't find it on fox's website.
    <hr noshade size="1">You bend it, you mend it.
  • lachoman
    lachoman Posts: 371
    The calculator gives values for single pivot and 4 bar linkages, i presume the cove is a 4 bar. The spring on the bike is 550 weight and the calc recomends a 695 weight, so presumeably i need a new spring. Does anywhere offer a spring exchange service? Where do people recomend getting one? The current spring is a 550*2.25 progressive suspension technology one so do i need a 700*2.25?
    <hr noshade size="1">You bend it, you mend it.
  • nicklouse
    nicklouse Posts: 50,673
    lachoman wrote:
    No manual, anywhere i can get it on the web? Couldn't find it on fox's website.

    look harder. eg look here
    http://www.bikeradar.com/forum/viewtopic.php?t=12534925

    which give you this link
    http://www.foxracingshox.com/fox_tech_center/index.htm

    oh what there? manuals.

    so what doe the air do? from the manual
    Boost Valve

    The Boost Valve creates a position-sensitive damping scheme that allows for a seamless transition from efficient ProPedal to square-edge bump absorption to a bottomless end-of-stroke feel. The Boost Valve also decouples the ProPedal and bottom-out adjustments, enabling ProPedal platform adjustments to be made without affecting the changes made to the bottom-out adjustment.

    The Boost Valve is not adjusted directly. Instead, its behavior and performance characteristics are influenced by the air pressure setting in the reservoir and by adjusting the ProPedal knob.

    To change the compression damping Oil or air damping resistance felt when trying to compress a shock or fork. characteristics of your DHX 4.0 shock, attach a FOX High Pressure Pump to the air valve on the reservoir:

    For a firmer ride, add 10 – 15 pounds of air pressure.

    For a softer ride, decrease the shock’s air pressure 10 – 15 pounds by using the pump’s bleed valve.

    Ride your bike and verify the settings before repeating the procedure

    but it is the last thing you set you need to set the rest and then tweek the pressure to what is right for you.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • lachoman
    lachoman Posts: 371
    cheers nick. i forgot to search the forum, only google.
    <hr noshade size="1">You bend it, you mend it.
  • nicklouse
    nicklouse Posts: 50,673
    have a read as it does go through the set up fairly well.

    re the spring for get the calc. can you get the sag right? if not then call Mojo and get the correct spring.

    that is the first thing you do (after making sure there is more that 75psi in the piggy back).
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown