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  1. #1

    Rotax thru hull VS Riva thru hull???

    I`m sure there is info here somewhere, but what is everyones opinions about both pipes, the pro`s and con`s, the fit? the couplers?

    I have the rotax retrofit pipe with the riva outlet. It does sound good, but the couplers are a little short for my liking. you got to have it just so, no margine either way.
    Does the new riva metal pipe still use the long coupler?
    any comments are appreciated...PR...


  2. #2

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    PR,I have installed 3 of the riva systems with the new metal pipe and it still uses the long coupler but when you install the pipe it fits right up to the outlet IMO it is an easy install and very good quality I dont have any experiance with the rotax racing set up but im sure it also is a quality piece.

  3. #3
    Site Admin Green Hulk's Avatar
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    There is no such thing as a Rotax Racing thru hull exhaust. It was Race Tech who is a Rotax Racing distributor that was making these. Last i heard Mark ran out of a source for tips so they are no longer in production.

  4. #4
    Scotty's Avatar
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    Jerry,
    Do you have an idea when the 4-tech perf. billet tip is going to be in the store. I am going to order a thru hull kit and didn't want to driil extra holes to change tips.
    Thank you,
    Scott

  5. #5
    Site Admin Green Hulk's Avatar
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    Scott, unless we can have them built cheaper they will never be in the store. Dont look for this tip to be available anytime soon

  6. #6
    Scotty's Avatar
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    Ok thanks Jerry. I may have a piece of material to make a shiny one out of.

  7. #7
    Quote Originally Posted by Green Hulk View Post
    Scott, unless we can have them built cheaper they will never be in the store. Dont look for this tip to be available anytime soon
    just out of curiousity!? what would they have cost?
    is it bc you can`t find a machine shop to produce these cost effectively?...PR...

  8. #8
    Quote Originally Posted by Green Hulk View Post
    There is no such thing as a Rotax Racing thru hull exhaust. It was Race Tech who is a Rotax Racing distributor that was making these. Last i heard Mark ran out of a source for tips so they are no longer in production.
    Oops! Yes, Mark made my thru hull pipe for use with the Riva outlet. It is spot on!... I did get a Rotax Racing decal with it tho ,

    anyways the retro pipe is 2.5 and I think the Riva is a solid 3" diam.
    How does pipe diameter help performance? I have to say that I didn`t have any performance issues with the 2.5 diameter pipe, But I`m thinking that the Riva pipe is for all of the stage kits, yes?...PR...

  9. #9
    EZ Dock of Long Island Shibby1485's Avatar
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    pretty positive riva pipe is not 3"... the pipe would slide right over the waterbox outlet if it was..

    mark's pipe and Riva's pipe are either 1/8" or 1/4" different, i forget... doesn't really matter... bottom line is you still have a 2" inner pipe in the j-pipe

  10. #10
    Quote Originally Posted by Shibby1485 View Post
    pretty positive riva pipe is not 3"... the pipe would slide right over the waterbox outlet if it was..

    mark's pipe and Riva's pipe are either 1/8" or 1/4" different, i forget.
    it was just a guess Marks pipes use a reducer coupler ...PR...

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