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  1. #1
    PWCToday Newbie
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    2000 SUV Carb rebuild

    Rebuilt carbs. Stock jetting, new 1.2 NS, Mikuni kits. Pop off set to 42 psi. Started like a champ. Noticed fuel dripping from the upper Venturi at idle on all three carbs. Bad NSís? Need more pop off?

  2. #2
    Frequent Poster Firebird!'s Avatar
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    Re: 2000 SUV Carb rebuild

    You should have been able to see if the N/S we're bad or not during the pop-off test, when you rebuild the carbs, checked the operation and make sure the o-ring around the seat ain't leaking. So, if you did, than it is pop-off needs to be higher.

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    $8 pop-off pressure gauge

  3. #3
    PWCToday.com Is My Home Away From Home Grumpy Old Guy's Avatar
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    Re: 2000 SUV Carb rebuild

    Its is normal for 1200NPV to drip fuel during idle.

  4. #4
    PWCToday.com Is My Home Away From Home
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    Re: 2000 SUV Carb rebuild

    Quote Originally Posted by Grumpy Old Guy View Post
    Its is normal for 1200NPV to drip fuel during idle.
    Don't listen to the self-proclaimed carb genius, he obviously has no clue when it comes to the 65u.

    They are not supposed to drip fuel at idle. They have 1.2 needle and seat to get your pop off pressure up in the 60/70 range for stock set up's. Check your check valves in the pump body the clear circular desk and look for creases. Only use genuine Mikuni rebuild kits and needle and seats.
    Do yourself a favor and do outside bills carb balance mod. You can find the how to thread on greenhulk site. The balance Mod is a must do imo. I personally own a 65u and have spent four years trying to tune it.

  5. #5
    PWCToday Newbie
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    Re: 2000 SUV Carb rebuild

    Everything I could find said pop off should be 38-42 so I went with it. Obviously that was wrong. I will go with the heavier spring and see what that does. Thanks!

  6. #6
    PWCToday.com Is My Home Away From Home
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    Re: 2000 SUV Carb rebuild

    55 is The absolute lowest pop off you can have on the 65u even with the balance and other carb mods.

    Like I said I've spent four years tuning A 65u. I just change my set up tonight rotated my carbs 90į. If your butterfly shaft bushing's are not worn by now they soon will be. Since I had them apart put in new needle and seats one of my cylinders were dribbling. The way the stock Linkages pulll against the carburetors it's very difficult to get them in sync group K talks about this on their website. Plus it wears out butterfly shaft bushings quickly. IMG_2199.JPG

  7. #7
    PWCToday.com Is My Home Away From Home
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    Re: 2000 SUV Carb rebuild


  8. #8
    PWCToday.com Is My Home Away From Home
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    Re: 2000 SUV Carb rebuild


  9. #9
    PWCToday.com Is My Home Away From Home
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    Re: 2000 SUV Carb rebuild

    IMG_2183.JPG

    Stock set up.

  10. #10
    PWCToday.com Is My Home Away From Home Grumpy Old Guy's Avatar
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    Re: 2000 SUV Carb rebuild

    Quote Originally Posted by driftmaster View Post
    I personally own a 65u and have spent four years trying to tune it.
    Yeah keep trying sooner or later you will get it.

    I dont think I have ever seen a 65U that didnt dribble fuel at idle. They shake so bad at idle its gonna happen as long as it runs ok I wouldnt worry about it.

    Drift has spent 4 years trying to tune his so that tells you what kind of tech he is. Fing idiot.

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