Where do I find the tall head nuts?

Discussion in 'Motorized Bicycle General Discussion' started by Rudz, Jan 5, 2015.

  1. Rudz

    Rudz New Member

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    I don't know what they're specifically called, I just know they're m8 1.25 nuts
     
  2. 2door

    2door Moderator
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    I'm assuming you're talking about cylinder head fasteners on a Chinese 2 stroke?

    Standard hex nuts will work but I prefer what is called, 'flanged or shouldered' nuts. They have them in smooth or with locking teeth. I buy mine at Ace Hardware. Look in their metric fastener section.
    Just make sure to use a torque wrench when installing the head. 120 to 140 inch pounds.

    Tom
     
    #2 2door, Jan 5, 2015
    Last edited: Jan 5, 2015
  3. Davezilla

    Davezilla New Member

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    What 2 Door said... but if you can't find then locally, crmachine.com , Fred will most likely sell you a set of the ones he makes if you call him.
     
  4. crassius

    crassius Well-Known Member

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    I see them on some motors coming in for repair - about twice the height of usual - don't know what kits they're on tho. I doubt they'd ever give the binding problem.
     
  5. Flyman

    Flyman New Member

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    Those are acorn nuts.If they are bottoming out before they seat, just
    cut the top off.Problem fixed.

    Fly
     
  6. mapbike

    mapbike Active Member

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    Here ya go

    $10 shipped to your door for a full set.

    If your have a GT5 engine like a Grube like Gasbike.net sells, Kingmotorbikes or Piston bikes these may not be the correct thread, but if you have a PK-80 type engine these should fix you right up.

    I'm assuming you are looking for this tall of a nut like is used on some of the aftermarket heads.

    Yes Fred is a choice and also this seller has them.


    http://www.ebay.com/itm/MOTORIZED-B...994?pt=LH_DefaultDomain_0&hash=item418bd7195a
     
    #6 mapbike, Jan 8, 2015
    Last edited: Jan 8, 2015
  7. maniac57

    maniac57 Old, Fat, and still faster than you

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    My local Ace sells them. "Coupler nuts" in various sizes. Some stores even have them with the nice dome heads like the ones that come with a Fredhead.
     
  8. crassius

    crassius Well-Known Member

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    those ebay ones aren't what I'm seeing on some bikes - I sometimes see them with threaded portions that long, but also have nice acorn tops
     
  9. Rudz

    Rudz New Member

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    I like the mzmiami ones, thanks guys
     
  10. mapbike

    mapbike Active Member

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    You're welcome...
     

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