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Thread: 38s vs 44s

  1. #1
    BigDaddyPT's Avatar
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    38s vs 44s

    xlint mentioned to me that my 38s might choke out on me on the top end side. Any other feedback on this? I'll have a rebuilt 780 motor with a pro CDI, premix and the carbs are all going to be rebuilt prior to use.


  2. #2

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    With a stock single pipe I think you will be fine. You might get good benefits from running 40's or 44's etc.. But I dont see an absolute need to run the bigger carbs.

    38's will give you better response and low end punch where the 44's will be a better topend carb, but may create a sluggish low end. If you put bigger carbs on and feel a poor throttle response, you may want to look into heads with less cc's.

    Edit: This all assuming you cannot tune out the any bugs.
    Last edited by RedlineR6; 02-23-2007 at 03:59 PM.

  3. #3
    cheatin' piston popper addicted's Avatar
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    like redline said, yo'll probably gain some up to at the expense of bottom end if you are mostly stock. Midrange will likely umprove too. You will be pulling them frequently to rejet. untill they are set up properly. You will also use roughly 2x the gas if you are on it alot.

    Maybe have the 38's taper bored for a good comprimise?

  4. #4
    BigDaddyPT's Avatar
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    Quote Originally Posted by addicted View Post
    Maybe have the 38's taper bored for a good comprimise?
    I have no idea what that means...lol

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    Connecticut CrazyA's Avatar
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    MOST people, (generally speaking) not all, feel the need to go bigger and half of them are running around over-carburated.

  6. #6
    Bing-A-Ding-Ding-Ding, Brrrrrap! Brrrrrrrrrap!!! Polaris_Nut#1's Avatar
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    38 and 44 refer to the size of the bore or the opening when you look down the carb. boring would make it a tad bigger. It just flows more air volume. Take the chokes out of your 38's for better flow and run a primer. My 2 cents and I'm cheap.

  7. #7
    qbzonk's Avatar
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    Quote Originally Posted by addicted View Post
    You will also use roughly 2x the gas if you are on it alot.
    Ain't that the truth. I got 44s on my GP and it's a pig on gas.

  8. #8
    BigDaddyPT's Avatar
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    Quote Originally Posted by Polaris_Nut#1 View Post
    38 and 44 refer to the size of the bore or the opening when you look down the carb. boring would make it a tad bigger. It just flows more air volume. Take the chokes out of your 38's for better flow and run a primer. My 2 cents and I'm cheap.
    thanks....i got a primer kit coming from Zig as we speak.

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    She likes the bike. But the ski gets her wet!!!! xlint89's Avatar
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    I dun told ya!

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