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Thread: 300sx mods?

  1. #1
    Spongebob PWCToday.com Is My Home Away From Home attnondeck's Avatar
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    300sx mods?

    what mods can i do to a 300sx to make it a bit faster? i know a kerker pipe would be the best mod but i cant afford that right now. so what affordable mods are there for the 300sx? thanks!
    Brendan

    1990 SN SJ 701 1990 SN Super Jet 650 Winter build
    1990 550SX
    1990 300SX





  2. #2
    PWCToday.com Is My Home Away From Home vshockey10's Avatar
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    Re: 300sx mods?

    whats on it now? before my 750 motor a 15.5 and big bore nozzle helped most. I have a aftermarket waterbox you can have if you want it.. but as Im sure you know its not really a power factor

  3. #3
    Banned motoman96's Avatar
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    Re: 300sx mods?

    buy a superjet!

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    PWCToday.com Is My Home Away From Home fastlife23's Avatar
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    Re: 300sx mods?

    damn it Kelli you beat me to it!
    88 kawasaki Ocean Pro 650sx http://www.pwctoday.com/showthread.php?t=199374For Saleat SkeTech in Des Plaines great shop!!!! (847-699-0363)
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    evatime you see me post in yo thread I say Snapperrrrrrrrrrrrrrrrrrrrrrrrrrr, you can damn well bet yo threads in the crappeerrrrrrrrrrrrrrrrrrrrrrrrrrr,

  5. #5
    Spongebob PWCToday.com Is My Home Away From Home attnondeck's Avatar
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    Re: 300sx mods?

    skat 16 prop. mariner ride plate. i think thats it.... anything motor wise i can do. maybe different reeds or stuffers?
    Brendan

    1990 SN SJ 701 1990 SN Super Jet 650 Winter build
    1990 550SX
    1990 300SX





  6. #6
    Top Dog 84kawi550's Avatar
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    Re: 300sx mods?

    you can always take a dremel to the ports.

    milling the head to bump up the compression would work too. i think 1mm off the head adds 25psi compression...at least thats what i read.
    timing advance for more bottom end might help too.
    Jeep, Arctic Cat, and Kawasaki, just about sums it up.

    Co-founder of the First Church Of Internal Combustion.

    '84 JS550, 1mm reed motor, PJS half pipe, SBN44, skat 15
    '92 750sx, custom curved connecting rod.

  7. #7
    resident guru aweebitofjt69's Avatar
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    Re: 300sx mods?

    mill the head
    2004 Honda Cr 125
    1985 js 550 stock for now

  8. #8
    PWCToday.com Is My Home Away From Home vshockey10's Avatar
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    Re: 300sx mods?

    carb off a wr500 would be a better idea... I would take your nozzle off and see how large you can bore if if you want to stay cheap

    a 300 motor is half a 650 motor so if you want aftermarket reeds and stuffers look for 1 650 one

  9. #9
    PWCToday.com Is My Home Away From Home vshockey10's Avatar
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    Re: 300sx mods?

    you can really mess your ski up if you dont know what you are doing with porting.. do research first on it dont just hack away hah

  10. #10
    Spongebob PWCToday.com Is My Home Away From Home attnondeck's Avatar
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    Re: 300sx mods?

    Quote Originally Posted by vshockey10 View Post
    carb off a wr500 would be a better idea... I would take your nozzle off and see how large you can bore if if you want to stay cheap

    a 300 motor is half a 650 motor so if you want aftermarket reeds and stuffers look for 1 650 one

    ah sweet!! good to know!!!! any idea what the stock nozzle bore is?
    Brendan

    1990 SN SJ 701 1990 SN Super Jet 650 Winter build
    1990 550SX
    1990 300SX





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