Question about triple tree alignment

Discussion in 'Airheads' started by DiabloADV, Jun 9, 2012.

  1. DiabloADV

    DiabloADV Semi-Occasional

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    My R90/6 has what we think are XR600R forks and triples. The top tree has stripped threads, so I ordered a nifty billet one:

    http://www.rswracing.com/xr600r.htm

    But this part has about 3mm more offset than the one on my bike. The fork and stem holes are the right size, and the right distance side-to-side, but the fork holes are ~3mm farther forward than mine.

    Am I right in assuming I can't use this? It doesn't line up with the bottom triple, and that would cause bad stresses if I tried to use it, correct?

    If that's the case, I'll have to return it.
    #1
  2. Cogswell

    Cogswell Spudly Adventurer

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    If it doesn't line up properly it will put your tubes in a bind.:deal


    Mike
    #2
  3. DiabloADV

    DiabloADV Semi-Occasional

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    That's what I thought. I emailed the vendor to try and figure out what triples I have.
    #3
  4. pommie john

    pommie john Long timer

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    If you're prepared to spend a bit more money you could get it fixed.

    I had the same problem with an old Honda I'm restoring, I bought a top triple clamp off ebay and it was from the same model, but a different year and the offset was 4mm different.
    I took it to a good machine shop and they bored the centre hole bigger , but offset by 4mm and then made a sleeve to take it down to the original size.
    Worked a treat and cost $50
    #4
  5. hardwaregrrl

    hardwaregrrl ignore list

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    Man! That must've been a while ago, machine shops in the us routinely charge $150 an hour!:huh
    #5
  6. DiabloADV

    DiabloADV Semi-Occasional

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    I've now figured out that I have triples from a late-80's CR125R (before they went to USD forks on those). They have less offset than the XR600R, but same fork and stem sizes. Plenty listed on Ebay...if I can't find a nifty milled one, I'll get a used cast one and clean it up.

    Those CR125's used the same forks as an XR600R.
    #6
  7. pommie john

    pommie john Long timer

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    Last month!

    The guy who did it used to spanner for Phil Read and always helps out racers.
    #7