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  1. #1
    SpeedJunky's Avatar
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    Question R1 VS R2 reflsah?

    I have read all the data on the 2 units and see the differences in peak rpm and max boost, but after that whats different.

    Both list the same boost to impeller to rpm ratings?
    Looks like the impeller and SC wheel are the 2 determining factors on what you will get or want out of the ski.

    So am I just making this to complicated or am I just missing something?

    Why pick the R1 over the R2 or why pick the R2 over the R1?


  2. #2
    RUSH.'s Avatar
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    Quote Originally Posted by SpeedJunky View Post
    I have read all the data on the 2 units and see the differences in peak rpm and max boost, but after that whats different.

    Both list the same boost to impeller to rpm ratings?
    Looks like the impeller and SC wheel are the 2 determining factors on what you will get or want out of the ski.

    So am I just making this to complicated or am I just missing something?

    Why pick the R1 over the R2 or why pick the R2 over the R1?
    Higher rev limit and more advanced timing=better acceleration.

  3. #3
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    DIFF

    The R-1 for me is if u dont go over 12lbs of boost and want to keep the ski mostly stock and still go very fast top speed
    R-2 modified alot and 12 lbs of boost or more- with pump modifications

  4. #4
    mjh3ides's Avatar
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    Quote Originally Posted by RUSH. View Post
    Higher rev limit and more advanced timing=better acceleration=even more cavitation with the stock pump.

    Oh well...gotta pay to play.

  5. #5
    Kevin I think you're going to want the R1, not the R2.

  6. #6
    Hydrotherapy's Avatar
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    my arse is sore from sitting on the R1/R2 fence...

    for ME its now the million $$ question...

  7. #7
    SpeedJunky's Avatar
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    Quote Originally Posted by Hydrotherapy View Post
    my arse is sore from sitting on the R1/R2 fence...

    for ME its now the million $$ question...
    Yep, on the fence too, the only thing I see is if you go with the R2 you will have to go with pump mods.

  8. #8
    SpeedJunky's Avatar
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    Quote Originally Posted by RXP-REX View Post
    Kevin I think you're going to want the R1, not the R2.

    R1 is for sure but may go to the R2, just undecided.

  9. #9
    mjh3ides's Avatar
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    Quote Originally Posted by SpeedJunky View Post
    Yep, on the fence too, the only thing I see is if you go with the R2 you will have to go with pump mods.
    I think a lot has to do with how much boost you plan on running.
    R1 with B1 wheel:
    Quote Originally Posted by BPnta View Post
    Using the dash tach, I was seeing somewhere around 8200 to 8300 RPM. Cavitation was pretty bad. I was hitting the limiter 5 or more times on holeshots.
    You might get away with keeping the stock liner/pump with the R1 if you stay with a stock or C1 wheel.

  10. #10
    Quote Originally Posted by SpeedJunky View Post
    R1 is for sure but may go to the R2, just undecided.
    Read the cavitation reports. Adjust your budget accordingly. With the R2 you're going to want a bigger SC wheel and IC. It's also turning more RPM. Personally I don't like the idea of running that close to 8600 RPM, considering that's what some people have quoted Yamaha as saying that's about the limit for the valve train. You're going to have a lot more cavitation issues, will probably take a new pump to fix it. Factor the additional costs, work, and maintenance in. I think the R1 will be a more everyday rec rider friendly setup.

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