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  1. #1

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    Apr 2019
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    Default Rear axle length for new hardtail

    After having the hardtail welded onto my 1978 fxe frame I have noticed my rear axle is too long.

    From the outside of my axle plates it measures 9 1/2 in... interior is 8 3/4in.

    My current axle is 13in thread to nut.

    I'm wondering where to start looking for a new axle. What length I should buy and if I could bring my current axle to a machine shop to have it cut.

  2. #2

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    You must have a provision for axle adjusters. On Softails these are wide washers on the outside of the axle plates. On a factory rigid, there is a similar spacer on the left side only, with the adjuster screw bearing on the axle hex on the right side.

    Remember to allow for that, but with that said, you can have the axle cut and threaded for your particular length. Also, you can look at disc brake XL axles, same 3/4 diameter, but shorter.

    Jim

  3. #3
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    Easy to measure what you need, cut to length and re-threaded. I had a new Jammer springer with rockers for 5/8 axle, but the axle holes measured 0.630", so went to the motorcycle scrap yard, got a 16mm axle (0.6299") and cut it to length and cut 5/8 UNF threads on each end so I could use the pike nuts I already had.
    Last edited by TriNortchopz; 12-24-2019 at 4:48 PM.

  4. #4
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    My first place to check would be Paughco

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    That's allot 3.5 in
    When I had mine done the axle was 3/4 in too long.figured out it was just a little twisted and narrowed at the axle plates.I think they pulled it out of the jig before it cooled from welding.
    I cut a block to size.heated the weld areas put the block in let cool.no more problems

  6. #6
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    I'd like to see a pic of what he's dealing with myself................

  7. #7

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    I'll have one up in a bit...but first Christmas

  8. #8

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  9. #9
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    ^^^^^^ That sure is a tight fit....^^^^^^^

    Will the chain even fit without hitting the frame??????

    What size tire is that??????

    Are you planning on running a fender????? If so what kind?????????

    The axle is the least of your worries as far as I'm concerned............

  10. #10

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    The tire is 19

    The wheel is pushed as far left as possible, haven't lined up the wheel rear yet due to the axle not tight

    Fender I wasn't too sure about yet possibly a "trailer fender"

  11. #11
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    That's not tight; rear of my rigid Norton has disc 1mm from frame and chain on other side is 1mm from tire and 1mm from frame...(1mm = 40 thou), not touching, wheel straight, chain inline, all good. that's tight.

  12. #12
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    Quote Originally Posted by Fxenewbie View Post
    The tire is 19

    A 19 what????????

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    Quote Originally Posted by TriNortchopz View Post
    That's not tight; rear of my rigid Norton has disc 1mm from frame and chain on other side is 1mm from tire and 1mm from frame...(1mm = 40 thou), not touching, wheel straight, chain inline, all good. that's tight.

    LOL No that's not tight that's lucky....... Do you ever tide it?????? LOL

    Merry Christmas...............

  14. #14

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    Sorry not 19 I ment 16....


    MT 90-16 M/C 71H

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    Quote Originally Posted by Tattooo View Post
    LOL No that's not tight that's lucky....... Do you ever tide it?????? LOL

    Merry Christmas...............
    No, that's precise measuring to make that Satellite wheel fit with Harley rotor and sprocket, noticed the masterlink brushed paint off, just the paint. Rides so good with the girder with shock.

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    Quote Originally Posted by TriNortchopz View Post
    ... noticed the masterlink brushed paint off, just the paint.
    Yikes! It may be precise measuring but that's not right.

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    Quote Originally Posted by hillcat View Post
    Yikes! It may be precise measuring but that's not right.
    Yep and if you put many miles on the chain and it will be eating off the metal.............

  18. #18

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    hard to tell but it looks pinched in to me. measure tubing near the axel plates inside to inside. move up about a foot and measure again. same?

  19. #19
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    Quote Originally Posted by flatman View Post
    hard to tell but it looks pinched in to me. measure tubing near the axel plates inside to inside. move up about a foot and measure again. same?
    I think he has a problem with the frame set up myself..............

  20. #20
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    Quote Originally Posted by Fxenewbie View Post
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    Cinch down one side, then work off other end.

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