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  1. #1

    Carb Rebuild Help Needed

    1998 gp1200 new to me. Leaking fuel into cylinders - time for carb rebuild. I am at approximately 3000’. Should I be ok with stock jetting? I should disclose that I don’t have much experience tinkering with carbs. I’ve rebuilt a couple but never messed with jetting or mods. Thanks.

  2. #2

    CARBS OFF

    Having a difficult time determining which Minkuni carbs these are.. BN, SBN, BI-I, 44mm?????? Again 98 gp1200.
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  3. #3
    Do these reeds/cages look ok? The end one looks like it was torched at some point in the past and then cleaned up. Would you replace that cage?


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  4. #4
    Carbs out of a 98 gp1200 are they Mikuni STD BN or Super BN. Also 1.2 or 1.3 N/S? Should I rejet for our altitude 3000’ above sea level? Thanks.

  5. #5
    See my other post. Just use stock jetting. There are bigger gains for high elevation depending where you ride.

  6. #6
    mudslanger's Avatar
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    Quote Originally Posted by 12ozcurls View Post
    Do these reeds/cages look ok? The end one looks like it was torched at some point in the past and then cleaned up. Would you replace that cage?


    As far as I can see from the pics it looks like the number one reed set is not properly sealing but number three is sealing good number two looks like it’s barely sealing but is sealing a lot better than number one.

  7. #7
    @wire4money - thanks. I’ll try to find your thread.

  8. #8
    Sorry to ask but which end is #1? Also, when I look at the reeds they’re all seated. What am I missing Mudslanger? Beside glasses apparently. Ha.


  9. #9
    mudslanger's Avatar
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    #1 is the flywheel end. If you had them bolted back on the motor 1 would be the front reed. It just didn’t look like it was sealing from the pic. I might be looking at it from a bad angle.

  10. #10
    Mvpxspeedy's Avatar
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    If no mods then keep it factory...DO NOT move the low and high screws. You will have a head ache trying to tune back.Keep the same jets just skin a bread tie or whatever and make sure they are cleared out.The needle and seat is the problem your most likely having.Maybe bad tip or wore out spring.

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