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  1. #1
    I dream skis
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    Any metallurgists?

    So Iím going to buy some head studs for my 1100, Kawasaki wants like 8 bucks a piece so Iím going to amazon or grainger. Stainless or regular steel? Aluminum cylinder...

  2. #2
    PWCToday.com Is My Home Away From Home Matt Jones's Avatar
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    Re: Any metallurgists?

    Im sure you could just find someone on this board that will send you a handful for very cheap. I used to have tons of head studs, but not any longer....cleaned up the shop.

  3. #3
    Top Dog bandit88's Avatar
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    Re: Any metallurgists?

    Ive seen cheap ones stretch and cause head gasket failures. I would use OEM or ARP. Not cheap, but cheaper than problems.
    -95 750SXI
    -86 440 with PJS800 conversion
    -90 TS650

  4. #4
    PWCToday.com Is My Home Away From Home theVetteman3's Avatar
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    Re: Any metallurgists?

    For watercraft applications, it's best to always shoot for stainless because they wont rust. The problem is regular steel is used for a reason, not only is it way cheaper, but alloy steel is much stronger than the most common 300 series / 18-8 grade of stainless steel. Torque values will go down if the strength of the stud or nut goes down. I'd be leery of using something that wasn't the proper strength for the head studs. For intake manifolds, I have used 18-8/ 300 series before with no issues.

    Simple answer, I'd try and find a oem set. I believe those are plated. Not sure how common plated studs are, but they will absolutely be better than the black oxide coated alloy steel ones. And for your reference, if cost is no object, high strength, heat and corrosion resistant stainless steel hardware, made out of A286, would be a great option. That's a fastener material that's pretty standard in aerospace for these reasons.
    1985 JS550/800 "Pretty Red": Newmiller 800, Rhaas 750 pump conv. [56.3mph gps]
    2009 1100 SJ:
    Kawi 1100
    2009 SJ MINT:
    KP steering adaptor, Worx 228 intake [45.6mph gps]
    1987 WJ650:
    6M6, JD Intake Grate, 17/20, cheater pipe [42.4mph gps]
    1994 XiR: 830cc Superstock, PJS side draft, 13/18 swirl [53.7mph gps]
    1998 SXI PRO:
    3DR hull mods [TBD]



  5. #5
    PWCToday.com Is My Home Away From Home BLRider's Avatar
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    Re: Any metallurgists?

    I am sure that I have a set at the house but I'll need a day to check. If you can wait, ill dig around.
    Never argue with an idiot, they will drag you down to their level then beat you with experience.

  6. #6
    PWCToday.com Is My Home Away From Home
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    Re: Any metallurgists?

    Just spread peanut butter on whatever you have.
    I'm only here to make you mad



    I'll tell your girl you said "hi".


  7. #7
    Top Dog
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    Re: Any metallurgists?

    Quote Originally Posted by whazguude View Post
    Just spread peanut butter on whatever you have.
    had a stud in my peanut butter once,never again.

  8. #8
    PWCToday.com Is My Home Away From Home mcn6's Avatar
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    Re: Any metallurgists?

    Been down this road a few times with head studs... Regular SS studs will stretch, steel studs will rust, ARP fasteners are cubic $$$, etc.

    Use OEM Kawi studs or Yami bolts.



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