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  1. #11
    Hydrotoys's Avatar
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    Good info.

    Moved it into it's own thread in the FAQ section.


  2. #12
    can any of you guys cut the prop side splines on a blank shaft? I can't find any info online anywhere on the spline size, od, spline root, angle or spline count. need a custom shaft machined with seadoo 28m splines on one end. preferably straight splines and not the stock crowned splines. any help is appreciated.

  3. #13

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    Quote Originally Posted by addicted View Post
    The thread fit and profile are cut to match the OEM yamaha shaft. Yhe work is done at a precision machine shop. I don't cut them myself. The shafts are checked for runout before and after the threads are cut.

    The splined part of the yamaha midshaft is heat treated from the factory, and the front half of the gpr midshaft is not. Diameter of the SD shafts is the same as the gpr midshaft. Wall thickness where the threads are is unchanged. It is simply a disassembled GPR midshaft.

    To clarify, Stock 02+ gpr goes
    engine> coupler> threads> shaft> threads> female spline

    Teds shaft
    Engine> spline> shaft> female spline

    My Shaft
    Engine>spline> threads> female Spline

    So essentially, it's the same as the stock 02+ gpr midshaft, just without the coupler damper.

    Does the same principal apply for the earlier GP shafts (pre 02) ie screw off internal thread?

  4. #14
    cheatin' piston popper addicted's Avatar
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    Just saw this. I actually have a gp1200 shaft here and the answer is no. The splines are in an intermediate piece and not the part that presses into the bearing. Click image for larger version. 

Name:	ImageUploadedByTapatalk1407968646.481350.jpg 
Views:	125 
Size:	286.3 KB 
ID:	338753Click image for larger version. 

Name:	ImageUploadedByTapatalk1407968662.286554.jpg 
Views:	102 
Size:	54.0 KB 
ID:	338754

    I'll sell this one cheap if you want to mess with it.

  5. #15

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    Quote Originally Posted by addicted View Post
    Just saw this. I actually have a gp1200 shaft here and the answer is no. The splines are in an intermediate piece and not the part that presses into the bearing. Click image for larger version. 

Name:	ImageUploadedByTapatalk1407968646.481350.jpg 
Views:	125 
Size:	286.3 KB 
ID:	338753Click image for larger version. 

Name:	ImageUploadedByTapatalk1407968662.286554.jpg 
Views:	102 
Size:	54.0 KB 
ID:	338754

    I'll sell this one cheap if you want to mess with it.
    Just to clarify, the longer on is the 02+ piece and the shorter one is the early one?

  6. #16
    cheatin' piston popper addicted's Avatar
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    No. All pictured are part of the go1200 shaft. The 02+ piece looks like the longer one pictured, but has the splines in it.

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