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Carb inlet boots

Discussion in 'XJ Technical Chat' started by Jackohelp, Sep 17, 2015.

  1. Jackohelp

    Jackohelp Member

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    Does anyone know where I can get the inlet boots for a 1985 xj700(n) maxim. 1FG-14453-00.
     
  2. Stumplifter

    Stumplifter Well-Known Member

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    Click the icon in the upper right-hand corner - XJ4Ever.
    Although I think someone mentioned that shipping overseas can get crazy with customs . . .


    Are you talking about the boots from the air box to the carbs or the carbs to the engine?
    The later, if showing cracks, can have RTV spread over them and then carefully stretch a section of bicycle inner tube over them.
     
  3. Jackohelp

    Jackohelp Member

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    Airbox to carb. Sounds a bit gash!
     
  4. Stumplifter

    Stumplifter Well-Known Member

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    It may not be pretty but it works.
    Actually you really don't notice it unless your really close.

    I digress, the boots you speak of need to be ordered, perhaps some of the other Europeans here can chime in on a source for these. Meanwhile check with XJ4Ever and see what he can offer.
     
  5. cgutz

    cgutz Well-Known Member

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    I've coated the carb to engine boots with RTV, hadn't thought of using inner tube...nice idea.
     
  6. Jackohelp

    Jackohelp Member

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    I've solved it...bloody well pleased. Used 50mm inner diameter flexible tube from Jewsons in the UK. They are 85mm long. I bought four but now figured I can cut exactly in half.
    I then cut the existing tube saving the as much as possible as they are molded to fit in the airbox. Then support inside I have cut a 40mm length of standard waste pipe. It is 43mm o/d and 1.5inch i/d so it fits into the existing boot a treat. The new section fits over the existing boot with this plastic support tube inside and is then clamped with a lovely stainless jubilee clamp. Perfect and now adjustable too for length. Left to right: 50mm i/d tube bought from Jewsons; Cut in half; Old Inlet boot,split at carb end; Newly finished boot with plastic was insert (white tube in the background) and saved airbox end of old boot.
     

    Attached Files:

    Sherman likes this.
  7. Stumplifter

    Stumplifter Well-Known Member

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    Looks good, looks sturdy, hope it works.
    My understanding is that the intake boots are 'velocity stacks' and their contour/ profiles are designed to create a vortex of air entering the carbs.

    Please report back on how they work on the bike.
     
  8. Jackohelp

    Jackohelp Member

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    Oh right, didn't realise that. They will only disrupt the air flow a bit I guess. Some people run these with pots which will have loads of turbulent air. At least with these the airbox is still intact with a slight narrowing effect in the middle of the boot. I'll have to wait and see. It won't be together for a while though but will report back what i find out.
     
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  9. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

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    Pods are a great way to make the engine run worse. Lots of people to all sorts of daft things.

    You may be OK since the air box is still part of the intake. Please let us know. While new intake boots are ideal, not everyone can afford them, and it's nice to have a running bike while saving up for replacement parts.
     
  10. Busted Knuckles

    Busted Knuckles Member

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    I'm going to need this as well for an 82 SECA 650.

    I'm looking over that XJ Catalog and not really finding the exact thing I need though.

    Part number 4H7-13586-01
     
  11. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

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    Start a conversation with Chacal.
     
  12. Busted Knuckles

    Busted Knuckles Member

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    Will do. +1 to you good sir.
     
  13. Jackohelp

    Jackohelp Member

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    Think the ones I need are 1FG-14453-00
    $80 for 4 on part number HCP849set4. I saving for an order from the states if i can't source the parts from uk for my rebuild/refurb so I don't have to keep paying huge postage costs.
     
  14. Busted Knuckles

    Busted Knuckles Member

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    Are these also referred to as the intake manifold sets?
     
  15. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

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    Yes.
     
  16. Jackohelp

    Jackohelp Member

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    Well they're on. And it runs but git a different problem regarding coils. I'll keep you posted.
     
  17. ant797

    ant797 Member

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  18. Jetfixer

    Jetfixer Well-Known Member

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    I recently got new boots from xj4ever for my xj750 Seca...simply awesome they are pliable makes pulling carbs easier..my originals were hard deformed and one was ripped . I agree with the other posts venturi effect will be lost with anything but these.
     
  19. Jackohelp

    Jackohelp Member

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    it starts and idles well. But I took it up the street and has a flat spot. In 2nd gear to try and pull up a hill. I probably need to take it on a run. Need to insure and tax and mot it first though.
    I did the wet float height off the bike.
    Balanced carbs on the bike at idle.
    Mixture not touched from new. Still has the brass caps on. Didn't touch the enrichment circuit. Didn't change any jets etc.
    Didn't spilt the rack.
    I did the valve clearances.
    The boots are not standard but are connected to the airbox. Surely they are not that critical?
     
  20. Jetfixer

    Jetfixer Well-Known Member

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    If you still have brass plug over mixture screw , you should remove to pull mixture screws out. This is only way to clean this out and ensure the O ring on mixture screw is not hardend or bad. 2.5 turns out from seating is a good starting point after checking.
     
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  21. Jackohelp

    Jackohelp Member

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    I have just leaned no 2 a bit it was a bit rich. But apart from that, can the intake velocity stacked intake boots cause a flat spot?
     
  22. k-moe

    k-moe Pie, Bacon, Bourbon. Moderator Premium Member

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    The airbox boots are important. That is very likely where your flat spot is coming from.
     

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