Exa 291R shock refill

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  • เผยแพร่เมื่อ 29 ธ.ค. 2024

ความคิดเห็น • 6

  • @mikewormsman
    @mikewormsman 4 หลายเดือนก่อน +1

    When you gonna fill it up parts 2 ?

  • @eliasbnh1211
    @eliasbnh1211 4 หลายเดือนก่อน

    thanks, when will you upload the part 2 plz ?

  • @iamengineer9795
    @iamengineer9795  4 หลายเดือนก่อน

    Maybe today, I must upload video.

    • @imho7250
      @imho7250 3 หลายเดือนก่อน

      Where’s the video showing how to service it? Lol
      I just ordered one and it will arrive today. I saw one good video on disassembling and refilling the oil and read some bits and pieces and now have a basic idea how it works.
      I was mainly looking for something showing what effect mounting it with the rebound adjustment on the bottom. Can’t find anything official but I saw something saying it can be mounted at 70 degree angle, but it doesn’t specify if just doesn’t like being horizontal or if it doesn’t like being anything other that rebound on top +/- 70 degrees.
      If I understand it correctly, the air chamber and its expensive floating piston is replaced with a piece of closed cell foam that acts as the air chamber and never gets soggy.
      So to refill it you need to get all the air out except what air is inside that piece of foam, such that after its all tightened back up, the air in the foam will compress as the shock rod goes in, taking up more volume, and as the shock rod withdraws, the foam quickly expands back because the air is high pressure now.
      In theory if you can burp all the air out with the foam fully expanded while the rod is withdrawn, the main damping piston should stay totally submerged in oil and give designed compression damping and give the rebound damping you dialed in.
      I think the foam is the key to understanding this shock and how to service it. Everything else is basic seals and o-rings.

    • @iamengineer9795
      @iamengineer9795  3 หลายเดือนก่อน +1

      @@imho7250 I just add oil as you described. Some disassemble maybe later, I would not destroy slightly leaking shock.

    • @imho7250
      @imho7250 3 หลายเดือนก่อน

      @@iamengineer9795 , I don’t think you will destroy the shock by opening it. There are a few videos showing how to do it.
      I think the key to making that shock absorber work good for your application (horizontally mounted) is using the proper viscosity fork oil and getting all free air bubbles out, while allowing the air bubbles in that foam to remain sufficient for the shock rod’s volume as the shock is compressed.
      My shock is brand new, not yet leaking, and I’m still testing if it has adequate damping. My initial impression is that it has virtually no compression damping and to get barely acceptable rebound damping I have to close the rebound valve fully.
      This tells me that it needs higher viscosity oil to get the rebound adjustment ideal while the adjustment knob is about halfway between fully open and fully shut.
      In the videos I saw they didn’t show if it actually had any significant compression damping built in or not. Its quite possible the compression damping port is fully open so that the foam doesn’t just instantly compress fully. I have no idea because I didn’t take it apart yet and none of videos show the main piston fully disassembled.