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Discussion Starter · #1 ·
Does anyone by chance know the size of allen head that the swingarm bolt is for my 86 fourtrax 250? It's pretty massive I know that. Thanks guys
 

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Yeah, it's a 17mm.
 

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Discussion Starter · #5 ·
okay so i have the socket now. i read in the book that i am supposed to use the "honda special tool" to remove the locknut. surely i dont really have to have this tool do i?? and is the locknut the 4 or however many little edges sticking out around the allen bolt??
 

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okay so i have the socket now. i read in the book that i am supposed to use the "honda special tool" to remove the locknut. surely i dont really have to have this tool do i?? and is the locknut the 4 or however many little edges sticking out around the allen bolt??
Yeah, that's the locknut. I have loosened the locknut before, with a big punch or dull chisel and a hammer, but it will damage the locknut. You can make a socket to take the locknut off. You just need an old 1 inch impact socket and a grinder. Grind the end of the socket to form 4 equally sized tabs that fit into the locknut’s notches. Making this socket works a lot better than the punch and hammer, plus when you put the locknut back on, it needs to be torqued or it will probably loosen back up. Below is a picture of a homemade locknut socket.

 

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Discussion Starter · #7 ·
i am not too worried about damaging the locknut since i am only taking it off to sell the swingarm. i am parting out the fourwheeler. nicely made tool though helmut. looks good
 

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If you're not worried about damaging the locknut, then just take a big punch and hammer and just angle the punch and turn it off like that. BTW, you shouldn't have to turn the locknut all the way off, just loosen it a bit. It should turn on off with the main bolt.

Actually, I found that picture of the locknut tool on the internet, but I do have one I made that looks just as good. LOL.
 

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Discussion Starter · #9 ·
ok, so helmut, is this locknut standard thread or is it reverse?? i am beating the hell out of it but it doesnt seem to be moving an inch. any suggestions?
 

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It's standard threads. It turns counterclockwise to loosen. Yeah, they can be hard to get off sometimes, but if you hit it hard enough, it will come off. It helps to have the biggest punch you can find. That's the way I used to take them off, until I made a socket.

Try spraying some penetrating oil on it, then tap it with a hammer to jar it, and let it sit for a while. If you still can't get it loose, you may have to heat it.
 

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Discussion Starter · #11 ·
thanks for your help man. i went back out there again with the BFH and i won. swingarm now off. :)
 

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Good, glad you got it off. I knew if you hit it hard enough, it would come off.
 

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Hey, I need an 86 fourtrax frame. I just recently crashed mine and now it is bent. Is it in good condition and if so, how much?
 
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