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  1. #1
    Site Admin Green Hulk's Avatar
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    Attention: Owners of 2013 and newer Yamaha SHO/SVHO skis please read!!!

    While not a big concern for stock skis, If you modify the ski for more RPM and more boost then there are two issues that cause some concern.

    One issue is on 2015 and newer skis the supercharger gear is pressed on the shaft and can move causing damage to the supercharger.
    If you are going to modify your 2015 or newer ski to turn more RPM then it's a great idea to upgrade the supercharger shaft.
    If you install a higher boost supercharger impeller then you must also upgrade the supercharger shaft.

    There are two options. Either the R&D shaft, or Riva supercharger shaft upgrade. You can save 10% off either option in the GreenHulk Store, by using the discount code: greenhulk


    RIVA SVHO/SHO Supercharger Shaft Upgrade Kit

    Our Super-Duty GEN-3 Supercharger Shaft Kit provides the ultimate in reliability for high boost applications. Kit features a revolutionary hydraulic...
    RY17040-UK-6S5-3 $494.95

    R & D Yamaha Billet Supercharger Shaft Kit

    R&D's new High Performance Billet Supercharger Shaft eliminates the weak design features of the OEM and aftermarket HKS supercharger shafts. After...
    612-25020 $339.95







    The second issue is the 2013 & newer supercharger front housing. (2012 and older housings need not be concerned)
    The front housing is 2 pieces and has the volute pressed into the outer housing. There are known cases where the volute moves back and makes contact with the supercharger impeller causing damage. It's a good idea to drill and tap the front housing and install a set screw as shown in the below pictures to prevent the front housing pieces from moving apart.

    Hope this helps!
    Jerry


    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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  2. #2
    Slamdcoop0428's Avatar
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    How would the front cover walk back against the impeller if it's already bolted down tight the supercharger itself?

  3. #3

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    its the volute inside that walks back

  4. #4
    Site Admin Green Hulk's Avatar
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    Quote Originally Posted by SilentShooter View Post
    its the volute inside that walks back

    Correct!

  5. #5
    Smokes's Avatar
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    Thanks for the heads up

  6. #6
    zone5's Avatar
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    Indeed, tnx Jerry...

  7. #7
    Slamdcoop0428's Avatar
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    Oh ok, I got it now.

  8. #8
    powerstroke specialist mikegp's Avatar
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    if im not mistaken there was a member with this problem already ,never followed so im not sure about the outcome .

  9. #9
    Will Willfzs's Avatar
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  10. #10
    formerly Gold06RXP Turbo Nick's Avatar
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    I just did this mod. Easy to do. Drilled and taped cover for 6-32 SS screw. Not going anywhere now.

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