LC4 Post Carb clean sub-frame hitch.

Discussion in 'Thumpers' started by leslyrix, Mar 22, 2006.

  1. leslyrix

    leslyrix n00b

    Joined:
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    Greetings to all. This is my first post here, I've come accross a little snag that I'm hoping some of you have come accross before . I've just removed and cleaned the carb ( LC4 640E 03 ). In order to get space to remove said lung I'd unbolted the sub-frame and eased it away from the frame, now having replaced the carb I've found that the sub-frame will not fit back over the two lugs on the frame. Sub seems to be about 4mm too narrow. Has anyone else found this? Is this the time to use a brute forcing tool ?
    Any pionters would be greatly appreciated. Cheers. Les.:confused
    #1
  2. dirtrider

    dirtrider Dusty Adventurer

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    Nov 12, 2003
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    Now you've completely ruined the bike.:cry

    To save you some grief and sorrow, I will be happy to take it off your hands. I will PM my address for shipping.












    :lol3 Shouldn't be a big deal. Have a helper spread the subframe while you start the bolts. Also, I highly recommend using blue loctite on all bolts to save future heart ache.
    #2
  3. Arch

    Arch Incurable Gearhead

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    Welcome, Les. :thumb
    And listen to dirtrider. The guy's surrounded by orange! :D
    #3
  4. Surly

    Surly surly adventurer

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    Ditto on the thread locker!
    I rattled two loose enough to break one halfway down Baja
    #4
  5. creeper

    creeper Still alive...

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    And next time... don't pull the subframe. The rubber airbox boot is very flexable and forgiving. Push pull... push pull.

    C
    #5
  6. Beez

    Beez Given to fly

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    Well, at least you can get your subframe off! I've made several attempts to remove mine over the years and it won't budge.:cry

    Here's two suggestions. Try a c-clamp to pull the subframe to the main frame - or - a spreader type clamp to push the subframe out. Some bar clamps can be reversed to act as a spreader.

    Good luck.
    #6
  7. markjenn

    markjenn Long timer

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    Welcome.

    Did it act like it was tweaked when you first unbolted and moved it? (A loud, springy boooing sound would be a clue.) Unless you've somehow got something installed wrong (unlikely if you just pivoted it up), I think you probably just need to muscle it to get it lined up.

    Any hard spills and these things get tweaked pretty easily.

    - Mark
    #7
  8. potatoho

    potatoho Cheese and Rice!

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    Many times people forget to loosen the clamp connecting the header to the midpipe. Tilting the subframe will push/pull those pieces.
    #8
  9. leslyrix

    leslyrix n00b

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    May 24, 2005
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    Suffolk. U.K.
    Cheers Guys,
    Thanks for all the help. I'm just back from me garage sub-frame re-fixed.It took the Brute forcing tool after all ( a large F clamp in fact ) to squeeze the lugs on the frame together enough to slide the sub-frame over. It seemed a little crude, but the jobbies done.
    Thanks agan.Excelent site.:thumb
    #9
  10. goatherder

    goatherder Wondering WTF?

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    Thats right, just smack the tabs with a hammer to move them in a tad.

    I removed the carb and had the same problem. I used a hammer & brass drift to bend the tabs in a little so they'd fit between the horns of the subrame.

    If you loosen the exhaust clamp, then remove the exhaust mount bold that's located close to said clamp, you can remove the two upper subframe bolts and shove downward on the ass end of the bike enough to tilt the top of the subframe aft. Oh...of course you need to loosen the front clamp on the aft carb boot first.

    After doing this you can then remove the carb quite easily.
    #10
  11. laramie LC4

    laramie LC4 flying something...

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    i agree 100% with creepy, i NEVER pull the sub frame to get the carb out. you dont need too. i can have the carb out, stripped, and re-installed in under an hour, and thats while drinking beer. the only real trick is figuring out the choke nut, once ya got that, the rest is easy.

    laters,

    laramie :beer
    #11
  12. bmwktmbill

    bmwktmbill Traveler

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    10-4 on the hammer.
    Did mine.
    No issues.
    b.
    #12