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Thread: 700 SX Air Box Mod

  1. #1


    Default 700 SX Air Box Mod

    Been doing some searching on here, and see in old posts that many advise not to do the airbox mod on a 700.
    Strikes me as odd.
    I have it done on mine, and it is the best running, least finicky sled I own.
    Always runs great, regardless of temp.

    I have bender pipes, thinned head gasket, air box mod, reed spacers.

    Who has actually had a problem with this ?
    -------------------------
    1997 Yamaha XTC 600 - (700 redhead swap underway)
    Bender Porting, Aaen twin pipes, V-Force 3, Dual bulb conversion

    1997 700 SX
    Thinned head gasket, Gutted Airbox, Reed Spacers, Bender Pipes, Viper Shocks,
    51/43 helix 89L weights

    2004 Viper S
    SLP pipes, peak performance head,

    2001 SRX 700
    Stock?

    1997 Mountain Max 700
    Black XTC Hood, XTC Front End, Thinned Head Gasket, Gutted Air Box, Reed Stopper Notch, SLP Pipes

  2. #2
    Junior Member Mini
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    Default

    What do you run for jetting with the air box mod? And is it better than just cutting your airbox?

  3. #3
    Junior Member Mini
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    Default

    Quote Originally Posted by Yamitriple View Post
    What do you run for jetting with the air box mod? And is it better than just gutting your airbox?
    What kinda gains will you see? 2-4 hp? More or less?

  4. #4


    Default

    Air box mod is drilling holes on the top.
    My jetting is 150 mains, 47.5 pilots, stock needles if i recall correctly.
    -------------------------
    1997 Yamaha XTC 600 - (700 redhead swap underway)
    Bender Porting, Aaen twin pipes, V-Force 3, Dual bulb conversion

    1997 700 SX
    Thinned head gasket, Gutted Airbox, Reed Spacers, Bender Pipes, Viper Shocks,
    51/43 helix 89L weights

    2004 Viper S
    SLP pipes, peak performance head,

    2001 SRX 700
    Stock?

    1997 Mountain Max 700
    Black XTC Hood, XTC Front End, Thinned Head Gasket, Gutted Air Box, Reed Stopper Notch, SLP Pipes

  5. #5
    Senior Member Stock
    Join Date
    Jan 2010
    Location
    Michigan
    Posts
    166


    Default

    I believe the consensus was the holes in the top half of the airbox under the filter were more than safe, it was removing or modifying the shelf that typically made jetting finiky.

  6. #6


    Default

    I have both done, and it works great.
    -------------------------
    1997 Yamaha XTC 600 - (700 redhead swap underway)
    Bender Porting, Aaen twin pipes, V-Force 3, Dual bulb conversion

    1997 700 SX
    Thinned head gasket, Gutted Airbox, Reed Spacers, Bender Pipes, Viper Shocks,
    51/43 helix 89L weights

    2004 Viper S
    SLP pipes, peak performance head,

    2001 SRX 700
    Stock?

    1997 Mountain Max 700
    Black XTC Hood, XTC Front End, Thinned Head Gasket, Gutted Air Box, Reed Stopper Notch, SLP Pipes

  7. #7
    Site Admin/CEO MrSled's Avatar
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    Apr 2003
    Location
    Weston WI
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    8,853
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    3


    Default

    From what I remember adding the holes and jetting to compensate on the dyno the gain was not worth all the much for the work involved and the fuel consumption suffered as well as the throttle was not as crisp. I am only trying to remember and my age may be finally showing..LOL

    But if yours is working great and are happy, they I am happy for you.
    Castle X Gear and more...

  8. #8


    Default

    Yes, it does work well. I really couldn't be any happier with that sled.
    Its my ditch sled, and I ride it more than anything else.
    Hard to beat a redhead with long travel for the ditches !
    -------------------------
    1997 Yamaha XTC 600 - (700 redhead swap underway)
    Bender Porting, Aaen twin pipes, V-Force 3, Dual bulb conversion

    1997 700 SX
    Thinned head gasket, Gutted Airbox, Reed Spacers, Bender Pipes, Viper Shocks,
    51/43 helix 89L weights

    2004 Viper S
    SLP pipes, peak performance head,

    2001 SRX 700
    Stock?

    1997 Mountain Max 700
    Black XTC Hood, XTC Front End, Thinned Head Gasket, Gutted Air Box, Reed Stopper Notch, SLP Pipes

  9. #9
    Site Admin/CEO MrSled's Avatar
    Join Date
    Apr 2003
    Location
    Weston WI
    Posts
    8,853
    Blog Entries
    3


    Default

    Quote Originally Posted by MURDER YAMAHA View Post
    Yes, it does work well. I really couldn't be any happier with that sled.
    Its my ditch sled, and I ride it more than anything else.
    Hard to beat a redhead with long travel for the ditches !
    Sounds awesome!! I sure miss the one I had build years ago.
    Castle X Gear and more...

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