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  1. #1
    wakewhornc's Avatar
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    GPR air silencers/air box mods?

    I pulled the engine out of my 04 1300 and was just looking over things and got to thinking of what to do with the air intake. To me it looks like the silencers should be removed to get more air in. Any problems with doing this? What do you guys do with your intakes, and the pros/cons of different setups. I ride in the surf alot so water intake is a concern. I did a search and didnt come up with a good answer, and im sure im just not using the right words in the search cause everything has already been covered about these things. This forum is a life/money saver


  2. #2
    hmmm, I know where there is an R&D power plenum air filter for sale here!

    if you must use the stock box, open it up and remove the screens only, install a flame arrestor on the end of the box, done...

    many have ridden surf without the box completely, but you have to be comfortable with that choice...

  3. #3
    Altezza01's Avatar
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    i ride in rough salt water and water intrusion is a concern for me as well. alot of people keep the oem air box but take out the metal screens which are restrictive and remove all the tubing connected to the front. this is what i did with great results.

  4. #4
    wakewhornc's Avatar
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    Quote Originally Posted by Pale Rider View Post
    hmmm, I know where there is an R&D power plenum air filter for sale here!

    if you must use the stock box, open it up and remove the screens only, install a flame arrestor on the end of the box, done...

    many have ridden surf without the box completely, but you have to be comfortable with that choice...
    i have seen a couple for sale but im trying to do it poor white boy style
    but i was thinking of putting some flexable intake hose and putting a flame arrestor and mounting it up around the oil tank. where can i find tapered flame arrestors?

  5. #5
    Altezza01's Avatar
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    here is a pic
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  6. #6
    Stop staring at my tits NJJer's Avatar
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    Quote Originally Posted by wakewhornc View Post
    where can i find tapered flame arrestors?
    I am looking at 9 of them right now.

    Check the classifieds, there should be some there.

  7. #7
    i took off the lid and left the metal screens

  8. #8
    Altezza01's Avatar
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    Quote Originally Posted by skyline2962 View Post
    i took off the lid and left the metal screens
    the screens are still restricting airflow....you should take them off

  9. #9
    improvised tmg97gp's Avatar
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    What size filter do you clamp on the front of the airbox?

  10. #10
    Flame arrestors do absolutely nothing to prevent water intrusion into the engine. Their sole purpose in life is to extinguish a flame in case of a sneeze or backfire.
    The steel mesh screens on the factory air box are for that exact purpose, to extinguish a flame, nothing else.
    The factory uses a series of air ducts to divert water away from the throttle bodies in case of a roll over. They dont attempt to use a flame arrestor, or air filter to prevent water intrusion because they know it doesnt work.
    If your paraniod about getting water in the engine, or worried about flipping the ski in the surf, remove the screen mesh from the airbox, which will give you minor gains, then reassemble the airbox and factory ductwork.. It is the only thing that will work to prevent water intrusion.

    Using anything else as an alternative to stop water, is as effective as using nothing at all.

    If you have excessive amounts of water in your hull when riding, of course, find and fix the leak.

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