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  1. #1
    gtxscrider's Avatar
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    Best ultra 150 mods

    Im looking for some mods to add some topend to my ultra, Currently im geting 65mph gps with the engine cold. With heat fade that drops down to 63.8 . I Read somewhere that milling the heads for higher compresion only gives torque? Im Looking for 68-69mph constantly . Just trying to firgure how to go about it?


  2. #2
    thesepaperwings's Avatar
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    Shredmaster plate for sure. Also, your impeller is prob hurting you without any motor mods to spin it faster.

  3. #3
    thesepaperwings's Avatar
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    Motor wise, carbs will get you more on top end. A D3 or stealth pipe would also help on top.

  4. #4
    Are your carbs modded at all? Have you ever removed the carbs and checked them to see how many washers were on the slides or have you ever checked your plugs to see if their rich?

    I ask this because I think your carbs are too rich which is why your slower than most. I've seen more than one Ultra that was bought and slow only to find out that just adding heads woke it up again. These boats were modded before being sold and just had the heads taken off .

  5. #5
    btldigger's Avatar
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    If you havent already check the mods thread in my sig. I would go ahead and do heads, probably skiworx or ada.

  6. #6
    Skiworx Level 1 will get you 68-69 consistently

    Skiworx Level 1.5 will get you 70+ consistently

    btldigger has lots of good info in his post that is linked above.

    Also Ultra150.com, has a good list of after market shops that make parts for the 1200.

  7. #7
    thesepaperwings's Avatar
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    I'm going to have a stinger mod or a D3 pipe for sale soon. If my carbs can handle the D3 then the stinger mod will be up, if not then someone will 44's or 50's can take the D3.

  8. #8
    gtxscrider's Avatar
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    I knoe the shredmaster is a must have item for the ultra! So im thinking heads , and d3 or stealth pipe. Is it possible to get 69 with the stock cv?

  9. #9

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    Shredmaster, ADA head, and 48mm Blackjacks.

  10. #10
    Oh, and an RXP, too. Ballin Ultras's Avatar
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    Quote Originally Posted by btldigger View Post
    If you havent already check the mods thread in my sig. I would go ahead and do heads, probably skiworx or ada.
    This dude knows his shyte on the 150. Listen to him speak and take notes. In fact, take them twice.

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