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Carb flooding, never to be moved float pins.

Discussion in 'XJ Technical Chat' started by phil29, Nov 7, 2010.

  1. phil29

    phil29 New Member

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    As an addenda to that, the bike is anxj550. Also the float pins are absolutely, completely immovable. Are they all like this? They're more like bloody rivets. I've seen pictures of snapped posts and I most definitely do not want to go there.
     
  2. chacal

    chacal Moderator Moderator Supporting Vendor Premium Member

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    Yes, the float pins on Mikuni carbs is a "press fit" into the posts. Silly design. Lots of penetrating oil, heat on the posts (only) to allow them to slightly expand, and a proper size pin punch to loosen/drive the pin out about an 1/8" of an inch, then you can grab the head of the pin with a pair of pliers and "twist" it out safely. Bot do NOT force anything, penetrating oil and time is cheaper than a replacement carb body!
     
  3. snowwy66

    snowwy66 Member

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    thanks chacal. i was wondering how i'm going to pull the pins on my suzuki. never seen pressed in pins before. and the ends are smashed to prevent sliding either way. i don't know of that's stock or something the PO did.

    i need to do some fiddling with the back carb. and plan to replace the brass float while i've got it apart. the front one has a plastic float but don't plan on replacing it.
     
  4. phil29

    phil29 New Member

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    I am just going to buy millions of fireworks and blow the thing up. (Insurers, I'm only kidding)
     
  5. wizard

    wizard Active Member

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    Get a 1/4 drive extension & small socket, put the extesion bar in the vice & use this set up to support the post while you punch the pin into the socket.
     
  6. phil29

    phil29 New Member

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    I'll give that one a go. Never ever seen a float pin/ post design like it.
     
  7. Bushy

    Bushy Active Member

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    ...but what about th post on th side you are punching from, it must become th weak link in th process..
     
  8. schmuckaholic

    schmuckaholic Well-Known Member

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    That's why, when I first broke down my Mikunis, I wedged a piece of metal between the posts -- to try and keep that post in particular from flexing.

    Somewhere on here is/was a picture someone did up -- they cut a groove in an old pair of channel locks. The idea was to put the jaws on the outer sides of the float posts and squeeze; the groove allowed the head of the pin to pass through while pushing the pin out. Put a spacer in between the posts while doing this and I think that might do the trick.
     
  9. bigfitz52

    bigfitz52 Well-Known Member Premium Member

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    Not really as the pin is only binding on the one side, where the head is.
     
  10. snowwy66

    snowwy66 Member

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    if your careful enough. a dremel tool would work to lightly grind one end of the pin down enough to pop through.
     
  11. wizard

    wizard Active Member

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    Where ya bin, Bushman?
     
  12. Bushy

    Bushy Active Member

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    Fitz..uh huh, I've never had Mikunis in my hand, seemed like a breakage about to happen.
    Wiz..apart from life in general, wearing in th new tyres occaisionally.
     
  13. Rice_Burnarr

    Rice_Burnarr Member

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    Here's a guy who made some neat pin removing pliers. http://xjbikes.com/Forums/viewtopic/t=19168.html From that thread:

    In theory, the pins are held in place only at the head end. You can see the slightly larger diameter section right under the head. The other end should be a slip fit. Assuming that it hasn't been glued in place by corrosion or varnish or hasn't been mangled by a previous owner or something like that.

    [​IMG]

    [​IMG]
     

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