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  1. #1

    What replacement bolts to use on carbs?

    I have 1999 1200xlt and after looking at some of the pics of the rebuilt carbs on this site Im thinking about replacing the carb bolts with the hex-head bolts I've seen in the photos. Does anyone know where I can obtain these bolts locally or online? Im assuming there will be 12 needed for the needle/seat side (shorter) and then 12 more needed for the fuel pump side. What are their exact sizes so I can look them up?

    Thanks


  2. #2
    Fumatelo tokeytokertin's Avatar
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    This is where i got my screws to rebuild my carbs.

    http://www.jetskisolutions.com/p64_s...ikuni_sbn.html
    Last edited by tokeytokertin; 06-29-2009 at 02:00 PM.

  3. #3
    Moderator OsideBill's Avatar
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    I use M5 x 35mm SST SHCS on the fuel pump side and M5 x 12mm SST SHCS on the metering side. I use SST flat and lock washers on them. I buy mine from Mcmaster.

  4. #4
    Great info thanks!

    The ones I found from mcmaster are here:

    M5x35
    http://www.mcmaster.com/#91292a193/=2fnwyo
    M5x12
    http://www.mcmaster.com/#91292a125/=2fnxdy

    Does this look correct?

  5. #5
    Moderator OsideBill's Avatar
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    Yep, don't forget the SST flat and lock washers, they are a necessary part of this.

  6. #6
    Moderator OsideBill's Avatar
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    Quote Originally Posted by partybob99 View Post
    Great info thanks!

    The ones I found from mcmaster are here:

    M5x35
    http://www.mcmaster.com/#91292a193/=2fnwyo
    M5x12
    http://www.mcmaster.com/#91292a125/=2fnxdy

    Does this look correct?
    These are the correct length for the GPR carbs Mikuni SBN-I body.

    The older SBN's take a M5 x 30mm on the pump side, metering side is same as above M5 x 12mm

  7. #7
    All hail the Chief! fullboogie's Avatar
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    Actually, if you measure the metering side bolts, they are not 12mm. They are 13mm or slightly more. Two of them could not grab enough threads on one of my carbs and stripped. I had to re-install the stock screws. In retrospect, I should have used my digital thingy to get the proper bolt hole depth.

    Bill, have you run into this problem?

  8. #8
    The four bolts that go into carb #3 (with the accelerator pump) has a thicker back cover. Those measure 13mm in length. The other screws for the other covers measure 9mm. I suspect Bill gets them a few mm longer (12mm) to account for the thickness of the flat and lock washer.

  9. #9
    Bill do you normally get the 8-18 stainless or the corrosive resistant 316 variety?

  10. #10
    Moderator OsideBill's Avatar
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    18-8 is perfect for this app.

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