Advertise on Bikeforums.net



User Tag List

Page 1 of 2 12 LastLast
Results 1 to 25 of 29
  1. #1
    Junior Member
    Join Date
    Sep 2005
    Location
    Lansing, Michigan
    My Bikes
    '99 Raleigh M80
    Posts
    13
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    MX Comp Coil question

    Does anyone know if the MX comp coil is supposed to make a clicking noise as you are riding over rough terrain? I just installed one on my bike and took it for it's maiden voyage last weekend. It sounded like a loose headset, I stopped several times to check it and the headset is tight. No leaks or other strange things with the fork, just the clicking noise. Is it normal? Thanks in advance.

  2. #2
    Ouch!!!
    Join Date
    Apr 2005
    Location
    Canada
    Posts
    453
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    How do you know you're not simply hearing the rough terrain????

    There's no WAY I can isolate a click when I'm bombing over rocks.

    Assuming you have super-human hearing and can tell the difference between a pebble clicking off your rims or frame, and the sound your fork is making - no, your fork is not supposed to click.
    "Do, or do not - there is no 'try'."
    Yoda

    RIP sydney.

  3. #3
    Senior Member iamthetas's Avatar
    Join Date
    Aug 2003
    Location
    colonial heights Va
    My Bikes
    Devinci Guzzler, 04 Canadian version
    Posts
    1,200
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    mine did that when new also. I lowered the air a smidge. problem solved.it was the rebound set too fast on the air side. later on I slowed the rebound down(pain in the rump on an 04 model) but not because of the clicking. it is long gone
    for the creation was subjected to futility,not willingly , but because of Him who subjected it in hope...that he might be the firstborn among many brethren. Romans 8:20-29
    the truth may not always be popular but its always true
    http://mysite.verizon.net/vzer3fnu/p...pcomingevents/

  4. #4
    Junior Member
    Join Date
    Sep 2005
    Location
    Lansing, Michigan
    My Bikes
    '99 Raleigh M80
    Posts
    13
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Thanks for the info about the rebound setting. It wasn't rocky terrain, it was hardpack trails with lots of tree roots and stutter bumps so there were no rocks or pebbles bouncing off the rim.

  5. #5
    Senior Member arboc!'s Avatar
    Join Date
    Nov 2004
    Location
    Spokane WA
    My Bikes
    specialized p.1, redline single x
    Posts
    1,462
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    this click could also be caused by the springs flexing out and hitting the sides of the stanction.

  6. #6
    Ouch!!!
    Join Date
    Apr 2005
    Location
    Canada
    Posts
    453
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Steve Russell
    It wasn't rocky terrain, it was hardpack trails with lots of tree roots and stutter bumps so there were no rocks or pebbles bouncing off the rim.
    In that case, please excuse my presumptuousness!

    (Your fork still shouldn't click, however.)
    "Do, or do not - there is no 'try'."
    Yoda

    RIP sydney.

  7. #7
    Pain Cleanseth Feltup's Avatar
    Join Date
    Mar 2003
    Location
    The only drug in me is beer.
    My Bikes
    On*One Imbred (commuter), Specialized Rockcombo(commuter)
    Posts
    1,066
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I just put a MX Pro on mine and it does the samething. I think it is just the spring bouncing around.
    It is better to lose clean then win dirty. Don't ride dirty

  8. #8
    Senior Member iamthetas's Avatar
    Join Date
    Aug 2003
    Location
    colonial heights Va
    My Bikes
    Devinci Guzzler, 04 Canadian version
    Posts
    1,200
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Steve Russell
    Thanks for the info about the rebound setting. It wasn't rocky terrain, it was hardpack trails with lots of tree roots and stutter bumps so there were no rocks or pebbles bouncing off the rim.
    mine made NO noise on big hits but roots, small bumps at high speed and stutter bumps were noisy. like said it could be the spring hitting( as mine was from a rapid reboound) do you have ETA?
    for the creation was subjected to futility,not willingly , but because of Him who subjected it in hope...that he might be the firstborn among many brethren. Romans 8:20-29
    the truth may not always be popular but its always true
    http://mysite.verizon.net/vzer3fnu/p...pcomingevents/

  9. #9
    Junior Member
    Join Date
    Sep 2005
    Location
    Lansing, Michigan
    My Bikes
    '99 Raleigh M80
    Posts
    13
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    No ETA on mine, just the basic fork. I slowed the rebound down a touch. I am also waiting for my firm springs to arrive so I can swap them out. Another question, how much air preload are you using. I noticed that they get very firm with very little air preload.

  10. #10
    Pain Cleanseth Feltup's Avatar
    Join Date
    Mar 2003
    Location
    The only drug in me is beer.
    My Bikes
    On*One Imbred (commuter), Specialized Rockcombo(commuter)
    Posts
    1,066
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I use about 52 psi.
    It is better to lose clean then win dirty. Don't ride dirty

  11. #11
    Junior Member
    Join Date
    Sep 2005
    Location
    Lansing, Michigan
    My Bikes
    '99 Raleigh M80
    Posts
    13
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Is yours the coil fork or air fork? I was looking at the manual that came with mine and for the preload on the coil spring fork they recommend 0-15psi. 52psi seems like a lot of pressure for the preload. Also would like to find a pump with an accurate gauge that reads that low, it is a pain in the a** to try to read that low on the gauge on my shock pump.

  12. #12
    Ouch!!!
    Join Date
    Apr 2005
    Location
    Canada
    Posts
    453
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Steve Russell
    52psi seems like a lot of pressure for the preload.
    It depends on the rider's weight, but 52 PSI is TOO MUCH - it needs to be between 0 - 15 PSI.

    http://www.marzocchi.com/spa/mtb/pro...LN=UK&Sito=mtb

    Marzocchi's chart (and manual) is confusing. The actual air pressure that you put in via your pump needs to be anywhere from 0 PSI to 15 PSI. Where the confusion lay is that the chart above shows you POSTIVE AIR PRESSURE - not the PSI you are supposed to inflate to. Postive air pressure is simply the weight that should be present on the fork by body weight, assuming you want ~20-25% of your total body weight to preload the fork. This corresponds to about 20-25% of your fork's total travel to be used up by preload (ie. just sitting static on your bike) - also known as sag.

    So - long story short - add as much PSI between 0 and 15 to achieve about 20 % of your fork's total travel to be consumed by sag (just sitting on your bike).

    Of course you can fine tune to your liking - it is not an exact science - but do NOT be mistaken in thinking that the chart above shows how much PSI to inflate to - it does not. Again, it only shows by rider weight, how much of your body weight is being used to preload the fork to roughly 25% sag.

    I don't know why Marzocchi even needs to keep showing this misleading chart in their manual.

    Again, for the MX Comp - the only thing you need to worry about is adding air between 0 - 15 PSI to give you roughly 20 - 25% sag.

    Somebody oughta sticky this.
    Last edited by shane45; 10-21-05 at 12:51 PM.
    "Do, or do not - there is no 'try'."
    Yoda

    RIP sydney.

  13. #13
    Ouch!!!
    Join Date
    Apr 2005
    Location
    Canada
    Posts
    453
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Feltup
    I use about 52 psi.
    WAAAAAYYYYY too much. See my post above. Does your fork even sag when you sit on it? There's no way you are using the full travel of your fork with that much air in it. I would suspect you have limited your fork to about an inch of travel.
    Last edited by shane45; 10-21-05 at 02:28 PM.
    "Do, or do not - there is no 'try'."
    Yoda

    RIP sydney.

  14. #14
    Junior Member
    Join Date
    Sep 2005
    Location
    Lansing, Michigan
    My Bikes
    '99 Raleigh M80
    Posts
    13
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    I thought that sounded like too much, my fork starts getting stiff even with 15psi preload in it. Thanks for the info about preload vs. sag, that helps.

  15. #15
    Ouch!!!
    Join Date
    Apr 2005
    Location
    Canada
    Posts
    453
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    It's the least I can do, considering I sounded a bit like a jerk in my first post in your thread.
    "Do, or do not - there is no 'try'."
    Yoda

    RIP sydney.

  16. #16
    Senior Member iamthetas's Avatar
    Join Date
    Aug 2003
    Location
    colonial heights Va
    My Bikes
    Devinci Guzzler, 04 Canadian version
    Posts
    1,200
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    what year fork are yall speaking of? Ive got an 04 ad it says for people my weight I should be using 45-52PSI. I keep it down at about 40 for plushness but anything below that and Im very squishy and cant climb worth a turd, even with the ETA engaged. its a 120mm with ETA
    for the creation was subjected to futility,not willingly , but because of Him who subjected it in hope...that he might be the firstborn among many brethren. Romans 8:20-29
    the truth may not always be popular but its always true
    http://mysite.verizon.net/vzer3fnu/p...pcomingevents/

  17. #17
    Ouch!!!
    Join Date
    Apr 2005
    Location
    Canada
    Posts
    453
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by iamthetas
    I should be using 45-52PSI.
    Read my post above. I bet you what you are reading does NOT say PSI - it says Lbs. There's a difference.

    The chart in my link above is for 2005 models, but I don't believe there was any difference on the '04's - you need to put 0 - 15 PSI in your fork in order to have 45-52 pounds (not PSI) of weight on your fork to preload it.

    If you are not using close to the full amount of your 120mm travel on moderate to bumpy terrain, you have too much air in it.

    It's simple really - add enough (or take out!) air in order to have 20 - 25 % of your fork's total travel used up just by sitting motionless on your bike (sag).
    Last edited by shane45; 10-21-05 at 04:14 PM.
    "Do, or do not - there is no 'try'."
    Yoda

    RIP sydney.

  18. #18
    Pain Cleanseth Feltup's Avatar
    Join Date
    Mar 2003
    Location
    The only drug in me is beer.
    My Bikes
    On*One Imbred (commuter), Specialized Rockcombo(commuter)
    Posts
    1,066
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    You all are smoking CRACK! Do you even know what PSI stands for? There is no other way to measure air pressure besides PSI(unless you use the metric scale). You are confused by your pump gauge. The gauge says LB/in2 which is pounds per square inch. 52 psi correct.
    Last edited by Feltup; 10-21-05 at 06:20 PM.
    It is better to lose clean then win dirty. Don't ride dirty

  19. #19
    Pain Cleanseth Feltup's Avatar
    Join Date
    Mar 2003
    Location
    The only drug in me is beer.
    My Bikes
    On*One Imbred (commuter), Specialized Rockcombo(commuter)
    Posts
    1,066
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    There is a difference between positive and preload pressure. The MX Pro only has positive which needs anywhere between 30-65psi or lbs. It is easier to look at the bar scale which is betweeb 0-4,50. 1bar is close to 15psi that is what the manual says to put in the MX comp coil an the MX pro coil, nether have ETA and they have air on both legs. For positive it says to put 2,90-3,80 bar(42-52psi or lbs). This is for the MX comp air, MX comp with ETA, MX Pro air and the MX Pro with ETA. This is in both legs unless it is ETA.

    I was wrong because the MX comp coil only has preload air and it only needs 0-15psi.
    It is better to lose clean then win dirty. Don't ride dirty

  20. #20
    fanatik Speedub.Nate's Avatar
    Join Date
    Mar 2005
    Location
    SF Bay Area, California
    Posts
    413
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by shane45
    Read my post above. I bet you what you are reading does NOT say PSI - it says Lbs. There's a difference.

    The chart in my link above is for 2005 models, but I don't believe there was any difference on the '04's - you need to put 0 - 15 PSI in your fork in order to have 45-52 pounds (not PSI) of weight on your fork to preload it.

    Shane, you are most definitely confusing this issue for everyone reading, my friend.

    Their coil forks use 0 to 15 psi (that's air pressure) for their preload. That's an indication read directly off the face of the pump guage. This is based on rider preference and not directly tied to weight.

    The air forks use 25 to 65 psi (again, air pressure) for main chamber pressure (positive pressure, they call it). Again, that's an indication directly from the guage. This is based on rider weight and should be set to achieve the desired amount of sag (typically 20 to 30%).

  21. #21
    Ouch!!!
    Join Date
    Apr 2005
    Location
    Canada
    Posts
    453
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    No my friends - call Marzocchi and find out for yourself.
    "Do, or do not - there is no 'try'."
    Yoda

    RIP sydney.

  22. #22
    Ouch!!!
    Join Date
    Apr 2005
    Location
    Canada
    Posts
    453
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by Speedub.Nate
    The air forks use 25 to 65 psi (again, air pressure) for main chamber pressure (positive pressure, they call it). Again, that's an indication directly from the guage. This is based on rider weight and should be set to achieve the desired amount of sag (typically 20 to 30%).
    No way is anyone going to get 20 - 30% sag with 65 PSI.

    Remember, I am talking about MX COMP forks here - not Marzocchi's entire line. The thread is about MX Comp - and nothing more.
    "Do, or do not - there is no 'try'."
    Yoda

    RIP sydney.

  23. #23
    Pain Cleanseth Feltup's Avatar
    Join Date
    Mar 2003
    Location
    The only drug in me is beer.
    My Bikes
    On*One Imbred (commuter), Specialized Rockcombo(commuter)
    Posts
    1,066
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Quote Originally Posted by shane45
    No way is anyone going to get 20 - 30% sag with 65 PSI.

    Remember, I am talking about MX COMP forks here - not Marzocchi's entire line. The thread is about MX Comp - and nothing more.

    Do you not understand the difference between postive air adjustment and preload air adjustment? First you said that pounds and PSI were two different things. Some Comp forks have positive which requires more pressure and some only have preload which requires low pressure. You really need to go back the middle school and learn some basic math skills. Here is the page from the manual, I hope you can read.
    It is better to lose clean then win dirty. Don't ride dirty

  24. #24
    Pain Cleanseth Feltup's Avatar
    Join Date
    Mar 2003
    Location
    The only drug in me is beer.
    My Bikes
    On*One Imbred (commuter), Specialized Rockcombo(commuter)
    Posts
    1,066
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    Here is the page.
    It is better to lose clean then win dirty. Don't ride dirty

  25. #25
    Senior Member iamthetas's Avatar
    Join Date
    Aug 2003
    Location
    colonial heights Va
    My Bikes
    Devinci Guzzler, 04 Canadian version
    Posts
    1,200
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    For positive it says to put 2,90-3,80 bar(42-52psi or lbs). This is for the MX comp air, MX comp with ETA, MX Pro air and the MX Pro with ETA. This is in both legs unless it is ETA.
    thank you for clearing that up. I thought it was PSI(pounds per square inch) as positive air and not preload.
    for the creation was subjected to futility,not willingly , but because of Him who subjected it in hope...that he might be the firstborn among many brethren. Romans 8:20-29
    the truth may not always be popular but its always true
    http://mysite.verizon.net/vzer3fnu/p...pcomingevents/

Page 1 of 2 12 LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •