Suntour Epicon Sag

rpec
rpec Posts: 7
edited January 2011 in MTB workshop & tech
I've just bough a focus thunder which comes with the 100 -140mm travel SF9 Epicon XC TAD 15QLC fork. when the bike was delivered the fork seemed very soft and had much more sag than the 28-35mm reccomended in the suntour manual. I've used a shock pump to increase the air pressure but I have reached 180psi (max air pressure according to manual) and the sag is still measuring 48mm. my weight is 85kg so I cant understand why the sag is so much more than it should be. Is there something wrong with the fork or are there other factors I havent taken into consideration? does anyone have any experience with this fork?

Also, I can't seem to see how the remote travel adjust lever works? anyone used this one?

Comments

  • nicklouse
    nicklouse Posts: 50,675
    http://www.srsuntour-tuning-base.com/in ... ingID=108#

    and chose how to set the sag its the SF7 there is also travel adjust info.

    dont think we have one of those forks in the shop but will have a look.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • chedabob
    chedabob Posts: 1,133
    edited August 2010
    Sounds like something is messed up. I had mine at 5 bar (72 PSI) and it sagged to about 18mm when I was on it (I weigh about 55kg with my gear on).
  • nicklouse
    nicklouse Posts: 50,675
    just a thought. is the lock out on?
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • rpec
    rpec Posts: 7
    nicklouse wrote:
    just a thought. is the lock out on?

    No, no l;ockout on this model.. just the travel adjust, which I cant for the life of me figure out how to use!
  • chedabob
    chedabob Posts: 1,133
    rpec wrote:
    nicklouse wrote:
    just a thought. is the lock out on?

    No, no l;ockout on this model.. just the travel adjust, which I cant for the life of me figure out how to use!

    Pull the lever, compress the fork, then release the lever.

    http://dl.dropbox.com/u/24525/Owners_Ma ... 2009-2.pdf

    That's the manual.
  • rpec
    rpec Posts: 7
    chedabob wrote:
    rpec wrote:
    nicklouse wrote:
    just a thought. is the lock out on?

    No, no l;ockout on this model.. just the travel adjust, which I cant for the life of me figure out how to use!

    Pull the lever, compress the fork, then release the lever.

    http://dl.dropbox.com/u/24525/Owners_Ma ... 2009-2.pdf

    That's the manual.

    Yep - read that and tried that. guess must be faulty or not installed correctly. could faulty travel adjust have anything to do with too much sag :?:
  • peter413
    peter413 Posts: 5,120
    How are measuring the sag, with a zip tie?

    If so, are you sure you aren't knocking it every time you get on/off the bike
    Transition Patrol
    Cube LTD 29er

    Glentress Trailfairies
  • rpec
    rpec Posts: 7
    peter413 wrote:
    How are measuring the sag, with a zip tie?

    If so, are you sure you aren't knocking it every time you get on/off the bike

    Yeah, using a zip tie. being sooooooo careful and gentle getting on and off and consistently get a measurement of 45-50mm
  • rpec
    rpec Posts: 7
    Thanks for your thoughts.
    It seems there is nothing obvious I am missing so I'm sure must be a problem with the fork. I've e-mailed the shop and will wait to hear what they can do. just means the weekend of riding my new bike which I had planned is out the window :(
  • rpec
    rpec Posts: 7
    Just removed the cable from the remote travel adjust mechanism and now the fork works perfectly! have dropped the pressure back to 100psi to achieve corect sag and all seems good (other than not having the travel adjustment still)
  • Jack 123
    Jack 123 Posts: 118
    How do you like the fork ??

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