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  1. #21
    Quote Originally Posted by DSR View Post
    Hi RideH2O,

    I wasn't familiar with the Seadoo shafts, so I googled them....
    YIKES!! I've got some machining experience so I got to ask a rhetorical question.....WTF were they thinking when they came up with that?!?!?
    Do the couplers require that the splines be shaped like that I assume?
    The rounded spines are so you don't have to line the driveline up dead on. You can be off a teeny bit and stil be good. The older Seadoos that used couplers had straight splines at the couplers.

  2. #22
    When you cant find a machine shop willing to do it....
    You make your own!



    I'm into this shaft $75 and 2hrs on a lathe at our local KTM shop.
    Suck on that all you local machine shops that said you didn't have time...lol

  3. #23
    Ziggy's Avatar
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    Very nice! What material did you use?

  4. #24
    Quote Originally Posted by Ziggy View Post
    Very nice! What material did you use?
    4130 chromoly

  5. #25
    My name is Sean and I am addicted to STXs smokeysevin's Avatar
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    Quote Originally Posted by RIDEH2O View Post
    4130 chromoly
    Is it a tube sleeve over the original cut shaft?

    I am going to need a cut stock doo' shaft at some point in the next 6ish months for a project.

    Sean

  6. #26
    Quote Originally Posted by smokeysevin View Post
    Is it a tube sleeve over the original cut shaft?

    I am going to need a cut stock doo' shaft at some point in the next 6ish months for a project.

    Sean
    From my build thread on PWCT...
    I got tired of waiting on machine shops to get back to me. So I just made it myself.
    4130 .125 wall chromoly ID was .883. I cut a OEM driveshaft in half, lathed down 4" on each piece to .887, used a 50ton press and pressed it together. It was a little scary...took a good 40 of the 50 tons to do it...lol. It came out dead nutz straight! I will weld the shoulders and DirtTricks will put a coating on it for corrosion protection. This should be well enough for a 120hp Spark motor

  7. #27

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    Quote Originally Posted by RIDEH2O View Post
    From my build thread on PWCT...
    I got tired of waiting on machine shops to get back to me. So I just made it myself.
    4130 .125 wall chromoly ID was .883. I cut a OEM driveshaft in half, lathed down 4" on each piece to .887, used a 50ton press and pressed it together. It was a little scary...took a good 40 of the 50 tons to do it...lol. It came out dead nutz straight! I will weld the shoulders and DirtTricks will put a coating on it for corrosion protection. This should be well enough for a 120hp Spark motor
    nice work, I was thinking to myself, damn he made that on a lathe as in all the splines and shoulders, etc..

  8. #28
    My name is Sean and I am addicted to STXs smokeysevin's Avatar
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    Quote Originally Posted by RIDEH2O View Post
    From my build thread on PWCT...
    I got tired of waiting on machine shops to get back to me. So I just made it myself.
    4130 .125 wall chromoly ID was .883. I cut a OEM driveshaft in half, lathed down 4" on each piece to .887, used a 50ton press and pressed it together. It was a little scary...took a good 40 of the 50 tons to do it...lol. It came out dead nutz straight! I will weld the shoulders and DirtTricks will put a coating on it for corrosion protection. This should be well enough for a 120hp Spark motor
    Very nice. Any specs on the Coating? It looks like TiN used on drillbits.

    Sean


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