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  1. #1

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    Mikuni BNI needle plate and pilot screw

    Ok then, I'll try one more question to the forum.

    I have a set of Mikuni BNI's that I've taken apart (McNasty inside!) and cleaned/polished etc. I'll put in all new stuff although the check valves are a royal PIA, even with a 2mm ball allen. Would someone clue me in on the needle plate and pilot screw that are behind plugs on the outer body of the carb? In the parts list below they are numbers 35 and 40. If I need to service them, how do the plugs come out?


    http://www.boats.net/parts/search/Ya...TOR/parts.html

    Anyone?


  2. #2
    Moderator OsideBill's Avatar
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    If you are doing a stock rebuild I would skip this. If the carbs were that bad, chances are the adjusters are frozen anyway. as for how to remove the Tamper caps, there is a sticky in the how to section. http://www.greenhulk.net/forums/showthread.php?t=94630

  3. #3

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    Bill,
    Thanks much, I read the sticky, it's doable for me.
    The only reason I was going to dig into them was to inspect/clean/o-ring them if needed. Yes I am doing a stock rebuild.
    There was general red stuff from the ethanol on the Diaphragm side and general calcification and deposits on the pump side. Although the dia side screws were a little rusty from the 2-6 years of sitting in a barn, a little soaking and they backed out just fine. The rings and gaskets weren't too bad, just a little hardened and crusty.
    In your opinion if you feel it not to be necessary I'll skip it, but if it was you and you feel better safe than sorry to have a look, let me know.

    Thank you again for your reply

    James

  4. #4
    Moderator OsideBill's Avatar
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    Like I said in the first post if you are just doing a stock rebuild, I wouldn't worry too much about it. If you can blow through all the orfices you are fine. The o-rings only seal the thread on the external side, and chances are they are frozen in place anyways. You may end up opening a whole new can of worms digging in to them. If you decide to do it remeber you need to know how mant turns out they were to start with so you can get them all set back properly.

  5. #5

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    I'll take a pass, you're awesome.
    Thanks for helping me get up to speed.
    I'm 3 weeks in but with help like yours the curve is shortening, a great thing for me.

    Much appreciated Bill

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