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  1. #1
    cfratt's Avatar
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    Riva XX Charger-RXT

    I understand i need rrfp and 42, o2 sensor, and 14/19 prop, is there anything else? What speed are people seeing with Riva xx on an rxt?


  2. #2
    West Texas RXP skoepp's Avatar
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    I think you will need a 15/20 prop.
    42,s may not be enough.

    On my RXT I'm running a rrrfpr, and 48's with riva pro x charger with good AFR.
    42,s were too lean.
    75 mph.

  3. #3

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    Skoepp, on my 05 rxt I'm running a seadoo x charger, 42's, fizzle he ic, 4" intake, Riva thru hull exhaust, rrfpr, mtx-l. Are the 42's going to be enough, I know it's not the Riva xx charger. And roughly what should I be running on my A/F gauge at idle as well as WOT? Thanks for any help.

  4. #4
    monaroman76's Avatar
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    The 42's will be fine for your application. It is a tried and proven setup you are running there.
    Around 13 at idle and mid and high 11's at WOT is where you want to be.

  5. #5

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    Thank you for that information. I'm about as green as green can be with these 4 stroke jet ski motors. But this forum has a tremendous amount of very good information that certainly helps guys like me. My son has 2 skis (modded xp and a jacked up gtx) and I just can't let him beat me.

  6. #6
    monaroman76's Avatar
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    Quote Originally Posted by JohnW View Post
    Thank you for that information. I'm about as green as green can be with these 4 stroke jet ski motors. But this forum has a tremendous amount of very good information that certainly helps guys like me. My son has 2 skis (modded xp and a jacked up gtx) and I just can't let him beat me.
    Thats the competitive spirit!! You've done all the right things with your ski, you just need to get it on the water and adjust your fuel pressure until it is dialled in nicely and it will go well. Your sons xp wont have much of a chance, but the gtx might depending on his level of mods.

  7. #7
    imp0ster's Avatar
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    Quote Originally Posted by monaroman76 View Post
    The 42's will be fine for your application. It is a tried and proven setup you are running there.
    Around 13 at idle and mid and high 11's at WOT is where you want to be.
    Factory X skis are running low 13s. Why can't a 215 with the X upgrades run high 12's?

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