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Thread: rpm's

  1. #1

    rpm's

    Hi, my friends got an 07 rxt completely stock, what rpms are normal for that ski. reason asking is the ski lost like 2 mph. thankx


  2. #2

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    Quote Originally Posted by GPR View Post
    Hi, my friends got an 07 rxt completely stock, what rpms are normal for that ski. reason asking is the ski lost like 2 mph. thankx
    my 06 stock was 8080/8100 thats where you want to be.

  3. #3
    that's exactly the problem ,ski only turned 7700. As you can see i'am not familiar with these motors, but i heard something about torque on the sc, Any hints on what the problem might be, were to start looking at?

  4. #4
    Moderator Snoman's Avatar
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    Quote Originally Posted by GPR View Post
    Any hints on what the problem might be, were to start looking at?




    Wear ring.....

  5. #5

    wear ring

    It's plastic on the seadoos right.

  6. #6
    Moderator Snoman's Avatar
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    Correct..

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    monaroman76's Avatar
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    Quote Originally Posted by GPR View Post
    that's exactly the problem ,ski only turned 7700. As you can see i'am not familiar with these motors, but i heard something about torque on the sc, Any hints on what the problem might be, were to start looking at?
    What you are referring to with the s/cers is the clutch slip.. As the clutches in the s/c wear the slip can become low enough to the point where boost numbers decrease hence the lower rpms. To check the slip you either pull the s/c out to get the most accurate reading or there are a few ways to check the slip while the s/c is still on the ski, a common method is to jam the prop with a broom stick and put a dial type torque wrench on the nut that sits on the front of the s/c impeller and turn the wrench COUNTER clockwise until the impeller spins, this is the point at which the clutch is slipping..
    I think like 7-8in/lbs is right for an rxt, but im sure someone else will correct me if im wrong..

  8. #8
    monaroman76's Avatar
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    Quote Originally Posted by GPR View Post
    Hi, my friends got an 07 rxt completely stock, what rpms are normal for that ski. reason asking is the ski lost like 2 mph. thankx

    Also where abouts are you riding and what temps are you riding in. Elevation, heat, humidity, and water temp can all effect rpms quite significantly

  9. #9
    Quote Originally Posted by monaroman76 View Post
    What you are referring to with the s/cers is the clutch slip.. As the clutches in the s/c wear the slip can become low enough to the point where boost numbers decrease hence the lower rpms. To check the slip you either pull the s/c out to get the most accurate reading or there are a few ways to check the slip while the s/c is still on the ski, a common method is to jam the prop with a broom stick and put a dial type torque wrench on the nut that sits on the front of the s/c impeller and turn the wrench COUNTER clockwise until the impeller spins, this is the point at which the clutch is slipping..
    I think like 7-8in/lbs is right for an rxt, but im sure someone else will correct me if im wrong..
    Thanks buddy, Exactly what i was refering to, is this a common problem on these ski and i'am guessing this could be the reason for the rpm's that are missing (400).

  10. #10
    skipSC's Avatar
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    Quote Originally Posted by Snoman View Post
    Wear ring.....
    +1

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