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  1. #1
    2017 RXT-X 300 zone 5's Avatar
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    Riva Power Filter on the RXT

    I've seen a lot about the rear filter on the RXP, but not too much on the RXT.

    Does anyone have any results of this added by itself to an other wise stock RXT (except it has metal washers)? speed gain rpm gain etc?


  2. #2
    Site Admin Green Hulk's Avatar
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    The power filter is good for about 150 RPMs.
    The stock air intake is very restrictive.

    Just so there is no confusion. Riva doesn't make a rear air intake for the RXT. what im talking about is the Riva Power Filter.
    http://www.4-tecperformance.com/inde...roducts_id=297
    Last edited by Green Hulk; 11-09-2007 at 05:01 PM.

  3. #3
    2017 RXT-X 300 zone 5's Avatar
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    Thanks Jerry!

    WIll these make a difference on the top end in the hot summer? With water temps in the mid 70's, I run 63-63 at 7900. I took the ski out 2 weeks ago in 50* water and turned 67 @ 8100.

    So could I see 8100 in the 70++ water temp, or will the heat still hurt?

  4. #4
    Site Admin Green Hulk's Avatar
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    Yes, by increasing RPM's you wont be as affected by dreaded heat fade. You should easily see 8100 in the hot summer months.

  5. #5
    My new toys at work bruinsrme's Avatar
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    Is that what its called. Heat fade. I assume that is why during the first 30 minutes I can get 8140 to 8150 then it drops to 8040. hmmmmm

  6. #6
    Site Admin Green Hulk's Avatar
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    Yep, thats heat fade.

    Also, installing a cooler thermostat such as the Riva kit or the Rotax Racing replacment reduces heat fade.

  7. #7
    My new toys at work bruinsrme's Avatar
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    Quote Originally Posted by Green Hulk View Post
    Yep, thats heat fade.

    Also, installing a cooler thermostat such as the Riva kit or the Rotax Racing replacment reduces heat fade.
    STOP IT YOU !!!!!

    Send me a shorty and I will consider it.


    Actually I need to get the air intake, intercooler, shorty (when it gets here) installed and the ski back together before i do anyting else. then do the wedge and prop.

    then maybe the thermostat. I figure it will take me a few days to even find the thing

    but almost a sure thing before the summer time.

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