XR400 swingarm bolt

Discussion in 'Thumpers' started by DrLewall, Dec 11, 2009.

  1. mcma111

    mcma111 Long timer

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    Your screwed. Really.

    I helped a bud a couple of years ago extract the swing arm bolt on his XR400. Same deal. The bolt would rotate but not budge side to side.

    Why??

    Because the bolt is rusted firmly to the bushing between the bolt and the swing arm bearing. It's spinning on the bearing.

    Back the nut off a couple of turns. Have a friend, one that you can trust hold a 6" 1/2" drive extension on the end of the bolt with the nut. Place yourself to the left rear of the bike facing away from bike. In your hand is a 6 to 8 lb mini sledge hammer. Line yourself up so that when you strike the 1/2" extension your right on the money. Don't miss or your friend will no longer be your friend. The reason you only loosen the nut is if the bolt doesn't want to come out you can re-tighten it. If you remove the nut and mushroom the end of the bolt your fucked. My friend and I did this and while the bolt did come out it was no longer usable. Yeah, I beat it to death.

    BTW... Thinking PB Blaster is gonna help is just wishful thinking and a waste of time.

    RUST NEVER SLEEPS>>>>>>>>>>>
    #41
  2. Luke

    Luke GPoET&P

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    A good friend would offer a friend a set of vice-grips to hold the extension. That way when the friend gets unfriendly with the sledgehammer, friends can stay friends. :freaky
    #42
  3. mcma111

    mcma111 Long timer

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    [​IMG][​IMG] Enlarge Image

    Ya mean like this ????

    <script id="easy2Script_grng_465" language="JavaScript" type="text/javascript" src="http://www.grainger.com/grng_465.js?GraingerItemNumber=2AJK5&pageid=/Grainger/wwg/item/itemdetails/itemdemo/&catID=Product_Demos"></script>
    #43
  4. Luke

    Luke GPoET&P

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    I had no idea there was a 'right' tool for this sort of job. Learn something new every day.

    :rofl
    #44
  5. mcma111

    mcma111 Long timer

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    I, of course have a Snap-On punch holder so my friend is still my friend and is not having to wipe his ass with his left hand...:lol3 :eek1 :lol3 :eek1 :lol3
    #45
  6. DrLewall

    DrLewall Master of bating

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    I remember once STRUGGLE'n with a pivot bolt!..NEVER agn! It's pulled 3 times a year now..if it needs it or not! PERIOD! :thumb
    #46
  7. NSFW

    NSFW basecamp4adv Super Supporter

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    if i don't post pics, can i just photoshop this one and put my face on it....:D
    [​IMG]
    #47
  8. mcma111

    mcma111 Long timer

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    Only if you have grey hair and use Yellow power tols
    #48
  9. DrLewall

    DrLewall Master of bating

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    fixt! :D
    #49
  10. NSFW

    NSFW basecamp4adv Super Supporter

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    i put an hour last night turning the bolt, pound, turn more, pound more....that thing won't budge.

    so, i brought this matter to our tool room people. their recommendation is, since the bolt is hollow, drill bigger holes in stages until that s.a bolt wall thickness is to about 1/6". seems to be a good idea.

    before i destroy the s.a. bolt by drilling it out, i will use an air hammer and let's see what happen after a couple of hours.

    i googled this and read horror stories there at thumpertalk.....:lol3

    hope this thing doesn't start to become my nightmare.
    #50
  11. Sasquatch2112

    Sasquatch2112 Old Angry White Guy (OAWG)

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    Joel, I was going to joke with you this morning about this.


    If you have access to a CNC machine. Lock the frame down and drill out the bolt. Buy the boys in the back room some beers and ask them to do it for you. Before you know it the bolt will be out.
    #51
  12. mcma111

    mcma111 Long timer

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    Break out the Saws All and kill that swing arm.

    Then buy this off E-Bay. Item # 230709887975

    It's even in your neighborhood
    #52
  13. NSFW

    NSFW basecamp4adv Super Supporter

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    haha.....resist, must resist...only if i could find a yellow sawzall.....:rofl
    #53
  14. Sasquatch2112

    Sasquatch2112 Old Angry White Guy (OAWG)

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    I has a Red one if you need it. Spa could drag it down tomorrow.
    #54
  15. NSFW

    NSFW basecamp4adv Super Supporter

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    peek-a-boo
    [​IMG]


    big thanks to doc, read this thread on time before the rust became a serious pain
    [​IMG]


    all the tools neeed. brass and deadshot hammers are great to have
    [​IMG]


    instead of using a bfh and heavy pounding, i patienly and repeatedly pounded the pivot bolt with the hammer until it broke loose. about 3 hours of work.

    wheh!
    #55
  16. mouthfulloflake

    mouthfulloflake Not afraid

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    what kind of xr400 has electric start?
    #56
  17. DrLewall

    DrLewall Master of bating

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    uh...the good kind? you know, the ones offered and SOLD in OTHER countries! :huh
    #57
  18. hellfire76

    hellfire76 haphazard adventurer

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    Or ones with an E start set up stolen from a 400EX
    #58
  19. NSFW

    NSFW basecamp4adv Super Supporter

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    i have to buy a used 400ex motor and took some parts, plus bought an adapter from boechat switzerland.



    not really cost effective, unless you like the xr4 which i do very much.
    #59
  20. Ed@Ford

    Ed@Ford Long timer

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    Has anyone actually done this? My riding buddy owns a shop with this kinda stuff...he says bring it in...we'll do it. I wonder if there are some issues in this method we don't know about!

    I looked closer at some of the pictures. The SA bolt seems to hang up in the bushing that goes thru the back end of the crankcase. I went thru the service manual and parts books, and I don't seem to find a replacement bushing if I somehow mess it up when I drill the swing arm bolt out
    #60