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  1. #1
    Tturbonegro's Avatar
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    Open filters instead of air box?

    What's the deal with open filters instead of the big bulky oem air box?
    Any pros or cons ?
    What's needed to do it?

    ( 99 951 GSX limited )


  2. #2
    canuck's Avatar
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    These are Proks on my 98 GTXL.

    I mainly wanted to get rid of the clutter of the factory airbox and get better access to the carbs. I did have to rejet it was a few years ago so I don't remember the jetting specs. These were installed after a full rebuild so I can't say if there was a performance increase as I bought the ski not running.
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  3. #3
    Tturbonegro's Avatar
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    What's your speedo say at max speed and rpm?

  4. #4
    open filters are more suseptable to water injestion, and 951's don't tolerate water well.

  5. #5
    canuck's Avatar
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    Quote Originally Posted by Tturbonegro View Post
    What's your speedo say at max speed and rpm?
    I need a new speedo wheel so no idea there. Max RPM is around 7K I believe I don't pay too much attention to it this is a rec ski not a racer.

  6. #6
    canuck's Avatar
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    Quote Originally Posted by slociviccoupe View Post
    open filters are more suseptable to water injestion, and 951's don't tolerate water well.
    That's why I have outerwares on there. It's been five years since the rebuild and Prok installation with no problems.

  7. #7
    svtnos's Avatar
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    mine is an all rec ski.. Im constantly starring at the tach.. 7k is good for a 951

  8. #8
    i was told by a very well respected race mechanic that the stock air box is better than open filter (even with the waterproof housing) as it causes lean spots

  9. #9

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    on 951's only?or also to the other engines?

  10. #10
    Tturbonegro's Avatar
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    Mine is also a rec ski and I always look at speedo ...

    I thought about the water thing...and looking at the bulky box its easy to see it's designed to bring in air but try to keep wate out at the same time....I have another question that may be silly...is there supposed to be a filter in the stock air box? Mine never had one...and I've never really noticed them listed on parts sites...am I missing it or am I asking a dumb question?

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