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  1. #1

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    Riva stage 2 , 04 RXP

    I just got my full stage 2 minus the wedge and my first runs were 8050 to 8100 at 74 to 74.5 at about 90 degrees temp. with full tank of gas and I was happy. Then I went out and burned a little fuel and gpsed again with it getting close to a hundred temp and my rpms were down to 78 to 7950 and speed was 72 to 74 and then it got a little rough and started slowing down and speeding up which I think is the BOV but I did not plug it off to see yet. Anyone else seeing this problem.

    Thanks
    Steve


  2. #2
    INDY27's Avatar
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    Those are great numbers! I bet you would see 75+ with the wedge as long as it didnt porpoise! How long did you run you ski that day? Was it surging only at WOT?

  3. #3

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    The first time about 15 min. The next time it was down a 100 rpms, Then a friend came out with his new RXP and we were racinig and it was a little rough and I left him pretty good and then it felt like it was shutting down and then it would start to pick up, I think the bov was opening and closing. I am taking some vacume caps with me today to plug it off.

  4. #4
    INDY27's Avatar
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    If that does not take care of the problem its possible you may have a vacuum leak on the intake or the IC blockoff plate that is happening once the ski gets hot. Keep us posted!

  5. #5
    Jarrett's Avatar
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    That's what happened when my SC died the second time. RPMs up and down when holding WOT.

  6. #6

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    I pluged off the BOV and everything is good now.

  7. #7
    INDY27's Avatar
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    Are you still getting the same top speed and rpm?

  8. #8

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    yes I am, 8000 to 8100

  9. #9
    Vern's Avatar
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    Steve, what impeller are you running? The Riva 15/20, or?

  10. #10

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    I am running a stock 15/20 and I am thinking if I send it in I am going to 14.5 to 19.5 it seems a little tall to me.

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