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Limiting the stoke on an RC4

Discussion in 'Downhill & Freeride' started by BmxConvert, Feb 24, 2013.

  1. BmxConvert

    BmxConvert Monkey

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    I've got an RC4 hanging out here from a previous bike that I'd like to set up on my current trail bike.

    My RC4 is 7.875x2.25 and my current trail bike uses a 7.875x2 shock.
    If I remember correctly Specialized Demo 7's used a .25" spacer on the shock to limit the travel. Does anyone know where I can source one of those or have any recommendations as to limiting the shock's travel without reducing the eye to eye measurement?
     

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  2. 4130biker

    4130biker Turbo Monkey

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    I found some .125" thick nylon washers at my hardware store. Mcmaster carr should have them too. Just find the right ID for your shaft. After that I cut a slot at an angle into the center of the washer with a hacksaw, then squeeze them over the shaft. I've different sizes of these to space down a couple shocks and forks and it works great!
     
  3. PsyCro

    PsyCro Chimp

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    Personally, when the RC4 came out, i was extremely stoked with the performance compared to the old DHX 5. I refuse to limit my stoke! :p
     
  4. BmxConvert

    BmxConvert Monkey

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    How narrow was the OD of your spacer? I assume trying to get it the same as the OD of the bottom out bumper would be ideal.

    Touche! I hated the RC4 on my Demo, however it seems to be a treat on my Sunday and the other RC4 went a long way in curing the crap VPP on my TRc. We'll see how it does on my 5.7c.
     
  5. Freeridin'

    Freeridin' Monkey

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    Might be easier and neater to match the OD and drill out the ID.
     
  6. BmxConvert

    BmxConvert Monkey

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    That was the plan. I just wanted to see how wide or narrow he went.
     
  7. Sandwich

    Sandwich just shake your rump

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    'dja miss that one?
     
  8. 4130biker

    4130biker Turbo Monkey

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    The OD was the same, if not a tiny bit bigger than the bottom out bumper. I'll try to upload a pic- I was really surprised how perfect they are- and something like 50 cents a piece!
     
  9. 300hp

    300hp Chimp

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    did ya figure it out?

    I assume you've tried to cycle the bike thru the travel with the longer stroke shock....many of these frames that run a 7.87x2 could run a 2.25 but don't. Case in point, my old heckler and my current Nickel come oem with a 2" shock (I assume because the bike needed to fit into a certain travel segment for marketability) but runs a 2.25 just fine.

    You could also do what I did on my Van RC, I cut of the factory "bottom out bumper", in quotes because its really not a bottom out at all, and replaced it with the vivid bump stop kit. Didn't have to cut anything or dissassemble anything. Now I can run the stiff bottom out bumper that comes with the kid and one little spacer to limit the travel just enough and get a nice progressive ramp-up at the end.

    H