DBP ported 6m6 cylinder R&D girdled head
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  1. #1
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    DBP ported 6m6 cylinder R&D girdled head

    any one know about this cylinder or what this chamber is? 650 or 701. a 701 head gasget fits the head better than the 650
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  2. #2

    Re: DBP ported 6m6 cylinder R&D girdled head

    Those cylinders run VERY well! Dallas Baker Products ("DBP"aka Pro-tec). What's the bore size and can you post a pic of the exhaust port?

  3. #3
    PWCToday.com Is My Home Away From Home fastgtfairlane's Avatar
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    Re: DBP ported 6m6 cylinder R&D girdled head

    if its over 81mm bore than its at least a 701. i think the 6m6 is 77mm bore stock. from what ive read, a 61x cylinder is just a big bore 6m6 cylinder
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  4. #4

    Re: DBP ported 6m6 cylinder R&D girdled head

    Superjet I rode had that cylinder at 81mm, 650 cases,single 44 and protec pipe. 51mph
    Last edited by 2strokesmoke; 08-29-2020 at 04:19 PM.

  5. #5
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    Re: DBP ported 6m6 cylinder R&D girdled head

    stock bore 650,thats a 701 gasket on top of 650 gasket just for reference there is a #3 engraved on top what does that mean?
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    Last edited by jrddillon; 08-30-2020 at 01:53 PM.

  6. #6
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    Re: DBP ported 6m6 cylinder R&D girdled head

    porting
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  7. #7
    PWCToday.com Is My Home Away From Home Myself's Avatar
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    Re: DBP ported 6m6 cylinder R&D girdled head

    I've seen tunneled out exhaust ports like that before.
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  8. #8
    PWCToday.com Is My Home Away From Home Waxhead's Avatar
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    Re: DBP ported 6m6 cylinder R&D girdled head

    Its a 650 superjet chamber. they go ok, not has good as the 701 chambers
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    PWCToday.com Is My Home Away From Home jdpilot's Avatar
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    Re: DBP ported 6m6 cylinder R&D girdled head

    Quote Originally Posted by jrddillon View Post
    any one know about this cylinder or what this chamber is? 650 or 701. a 701 head gasget fits the head better than the 650
    how much?

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  10. #10
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    Re: DBP ported 6m6 cylinder R&D girdled head

    I have no idea what its worth

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