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  1. #1
    Site Admin Green Hulk's Avatar
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    RIVA Supercharger Shaft and Impeller Install - Overview

    I installed my Riva supercharger shaft today and wanted to give you guys an overview of what's involved in doing this job. These superchargers are very easy to work on.

    The Riva heavy duty supercharger shaft comes with new bearings and a new impeller nut


    Once you get the supercharger removed from the ski you will remove the gear cover plate held on by 3 allen head screws




    Now remove the front cover. You will need to carefully tap the front cover with a rubber mallet once all the bolts are removed



    Remove the impeller by turning the nut CLOCKWISE as it has reverse threads. Apply a little heat to the nut first to break the loc tite. Once the nut is off apply a little heat to the impeller. This will make removing it from the shaft easier.

    Now you will remove the outer and inner cover plates behind the impeller. Once the inner cover plate is removed the front bearing will come right out. Replace it with the new bearing from the Riva shaft kit and then reassemble the inner and outer cover plates.



    To remove the rear bearing you will need to remove a snap ring.



    Install the new Riva bearing and put the snap ring back into it's groove.

    Drop the shaft in place and install the impeller. You will need to apply some heat to the impeller and then use a gloved hand to press the impeller down into place on the shaft.




    Apply a little red loc tite on the threads of the SC shaft and then tighten the new nut down to 70 INCH LBS (not foot pounds) Remember, the threads are reverse so you will turn the torque wrench counter clockwise to tighten the nut.

    Install the front cover onto the supercharger.

    Install the rear gear cover plate.

    Done! Now install the supercharger back into the ski.

    The actual instructions for the supercharger shaft can be found here
    http://www.rivamotorsports.com/instr...040_uk_6s5.pdf

    If you are only doing a supercharger impeller change then the instructions can be found here
    http://www.rivamotorsports.com/instr...y17040_sci.pdf

    Hope this helps!


  2. #2
    mjh3ides's Avatar
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    Cool...nice easy job! Glad I bought a snap ring tool when I put on the HKS.

  3. #3
    Addicted Member 5001craig's Avatar
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    Very nice Jerry--as always.

    Like the E1 wheel too.

  4. #4

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    What took you so long.

  5. #5
    hitman's Avatar
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    I've got to hand it to Riva on their instructions. I picked up an R&D cooling kit and I might as well use those instructions to get the grill going.

    Good info Jerry. I'll be doing this very soon.

  6. #6
    i will get all the rest i need when im dead corkycat's Avatar
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    +1 on the cooling kit instructions...
    they are about as much use as a chocolate tea pot!!!!

  7. #7
    hsdforever's Avatar
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    Thanks a lot for your post !

  8. #8
    Site Admin Green Hulk's Avatar
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    Quote Originally Posted by hsdforever View Post
    Thanks a lot for your post !
    You're welcome. Glad you enjoyed it!

  9. #9
    Bounty Hunter Carlos Thomas's Avatar
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    Jerry,

    Convince me why I need to buy this product.

  10. #10
    Site Admin Green Hulk's Avatar
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    Quote Originally Posted by Carlos Thomas View Post
    Jerry,

    Convince me why I need to buy this product.
    I wouldn't buy it just to change it. If you break your stock supercharger shaft then you would want to buy either the Riva or R&D shaft kit.... OE shafts are not available from Yamaha.

    There have been many people break their stock shafts changing supercharger impellers. You never read about it on the forum though

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