Did I screw up these Honda C70 fork bushings?

Discussion in 'The Garage' started by nick2ny, Nov 19, 2012.

  1. nick2ny

    nick2ny Been here awhile

    Joined:
    Mar 5, 2009
    Oddometer:
    550
    Howdy--I'm nearly done refreshing the fork on my C70. I got a kit from DRATV kit, removed all the old parts, and put in the new parts. I pressed in the outer bushings and now the inner ones don't fit (I used a press, and they went straight in with a little force. It felt fine).

    They would probably go in with pressure, but then the suspension wouldn't work very well.

    Was I supposed to use heat on the suspension arms and get the interference fit to work with heat? I can't imagine I damaged them with the press, they went in really easily. The inner pieces also fit easily before I pressed the outer pieces in. Ugh.

    The bike!
    [​IMG]

    The suspension arms, still on the bike
    [​IMG]

    That stupid press that I thought I was so lucky to find.
    [​IMG]

    The old, worn bushings.
    [​IMG]

    Success! (or so I thought)
    [​IMG]

    It looks so easy. Look how loose the tolerances are.
    [​IMG]

    The mess I'm in now.
    [​IMG]
    #1
  2. CycleDoc59

    CycleDoc59 Wrench Rider

    Joined:
    May 24, 2006
    Oddometer:
    984
    Location:
    East Virginia
    I expect the fit of the inner bushing within the outer is very close, so
    as to not have play or looseness. You say the two fit together ok before
    installation of the outer bushing..? Then perhaps the pressing procedure
    upset the edge of the outer bushing a bit. It would take very little to do so.
    So, look carefully at the outer bushing edges(s), and remove any imperfections....
    #2
  3. nick2ny

    nick2ny Been here awhile

    Joined:
    Mar 5, 2009
    Oddometer:
    550
    Thanks for the reply. Pressing didn't mess up the edges though. The rims of the outer bushings have a ~0.5mm chamfer, and it isn't deformed or damaged or nicked all the way around, either on the inside or outside edge of the chamfer.

    It's like the outer bushings are either squished in 0.001", or are slightly ovalized.

    Woe!
    #3
  4. GreaseMonkey

    GreaseMonkey Preshrunk & Cottony

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    Jun 16, 2006
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    Location:
    The only county in Illinois with no train tracks
    #4
  5. ttpete

    ttpete Rectum Non Bustibus

    Joined:
    May 13, 2009
    Oddometer:
    6,188
    Location:
    Dearborn, MI
    Better yet, go to an automotive machine shop and have them hone the bushings on their Sunnen honing machine. Bring a pin so they can check the fit. It should only take a few minutes.
    #5
  6. ragtoplvr

    ragtoplvr Long timer

    Joined:
    Oct 18, 2007
    Oddometer:
    6,696
    Location:
    central USA
    brake hone. They only cost a few dollars.

    Rod
    #6