Yamaha 6M6 44SBN and 61X 44SBN differences??
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  1. #1
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    Yamaha 6M6 44SBN and 61X 44SBN differences??

    Ok, so other than the obvious jetting differences between OEM 44SBN carbs found on the 650 and 701 single carb motors is that the extent of the differences? I had thought that I read somewhere that the internal circuitry is different on the 6M6 (also 61L) 650 carbs from the circuitry on the 61X 701 carbs. I am wanting to use a 650 carb on a 701 and do not want to waste my time with rejetting if they are different internally. Anybody have any advice or experience?
    06 SXR Limited, a couple of modded RNs, and WAY too much other crap !!!!!!

  2. #2
    PWCToday.com Is My Home Away From Home fox river pwc's Avatar
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    Re: Yamaha 6M6 44SBN and 61X 44SBN differences??

    They are different internally.

    I believe Harry Klemm explains the details on his groupK website somewhere.

    I've used them interchangeably without issues many times.
    Last edited by fox river pwc; 08-13-2019 at 04:32 PM.


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  3. #3
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    Re: Yamaha 6M6 44SBN and 61X 44SBN differences??

    Quote Originally Posted by fox river pwc View Post
    They are different internally.

    I believe Harry Klemm explains the details on his groupK website somewhere.

    I've used them interchangeably without issues many times.
    Fox River - thanks for your input! I am going to try it based on that alone
    06 SXR Limited, a couple of modded RNs, and WAY too much other crap !!!!!!

  4. #4
    Resident Guru bored&stroked's Avatar
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    Re: Yamaha 6M6 44SBN and 61X 44SBN differences??

    Internal differences are slight, you won't notice any difference once jetted.
    Its like going from an oem 44 to a strait from mikuni 44. Yes, they are different. But they are the same.
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  5. #5
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    Re: Yamaha 6M6 44SBN and 61X 44SBN differences??

    Quote Originally Posted by bored&stroked View Post
    Internal differences are slight, you won't notice any difference once jetted.
    Its like going from an oem 44 to a strait from mikuni 44. Yes, they are different. But they are the same.
    Ok, I feel much better about using the one I have on hand. Appreciate the input!.
    06 SXR Limited, a couple of modded RNs, and WAY too much other crap !!!!!!

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