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Dirt Bike Wheel Truing Jig

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  • Dirt Bike Wheel Truing Jig

    I purchased a commercial wheel truing jig some time ago when I was restoring some vintage dirt bikes and it worked great. Recently I had to respoke a modern rear wheel and the jig was too small.
    The wheel needs to be trued so I had to fabricate a truing jig that can handle all wheels.

    Today I ordered and picked up all the aluminium sections needed for the job.
    Material including cutting cost $24.00.

    I had to lathe and cut a 3/4" UNC thread into the solid round bar.

    Ji
    Attached Files
    Grip it and Rip it

  • #2
    I drilled out a 1" hole in the box section to recieve the threaded rod axles.
    So the threaded rod axles line up I clamped it all together while I tacked it.

    I am not the best at welding small diameter tube fillet welds so you will all have to cut me some slack on the welds.

    Ji
    Attached Files
    Grip it and Rip it

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    • #3
      Then it was just clamp, wire brush and TIG weld.

      Ji
      Attached Files
      Grip it and Rip it

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      • #4
        Nice work and pics...Bob
        Bob Wright

        Spool Gun conversion. How To Do It. Below.
        http://www.millerwelds.com/resources...php?albumid=48

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        • #5
          Thanks for the kind words Bob.

          Ji
          Grip it and Rip it

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          • #6
            I then countersunk some hidden screws to hold the telescopic legs followed by fitting some height adjustable feet.


            Ji
            Attached Files
            Grip it and Rip it

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            • #7
              Then I decided to go fancy with the handle and make a S/S hand wheel.
              I used a bar bender to get two 180 degree 8mm diameter bars.
              If done right they should just about make a perfect circle when cut and welded.
              A hole was drilled into the threaded rod and another 8mm S/S bar was taped into position.
              Then all the hand wheel parts were TIG welded together.

              Ji
              Attached Files
              Grip it and Rip it

              Comment


              • #8
                Time for a test.
                The truer can hold a modern rear wheel no problems.
                I gave mine extra depth and width so I can true a wheel even with the tyre still on the rim.
                This is a rear wheel with is 19" diameter while a front wheel is 21" diameter.

                Very pleased with the results now I can start truing that wheel so we can be riding again this weekend.

                Ji
                Attached Files
                Grip it and Rip it

                Comment


                • #9
                  looks good and you pocketed a lot of cash over buying a new one.

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                  • #10
                    Nice work!

                    Comment


                    • #11
                      Hi Mike,
                      Yes and the satisfaction of a job well done.
                      The truer also allows you to do all sorts of wheel maintainance.
                      Yesterday it held a wheel while I welded up another crack.
                      Today it held a wheel while I taped it and just after that I spun a KTM wheel in it to see if it needed truing.

                      Very happy I spent the time.

                      Ji
                      Attached Files
                      Grip it and Rip it

                      Comment


                      • #12
                        Hi Hartmann,
                        Thanks for the kind words.

                        Ji
                        Grip it and Rip it

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                        • #13
                          The best spoke spanner I have ever used is made by Motion Pro in the USA.
                          Over here they cost $26.00 but they are worth their weight in gold.
                          Most spanners round the nipples but this does not as long as you don't apply too much force.

                          Ji
                          Attached Files
                          Grip it and Rip it

                          Comment


                          • #14
                            Good job,

                            I've never been into bikes and was wondering how you true a wheel.
                            Touch up with a mallet, tighten or loosen spokes ? Just curious
                            Kemppi Pro Evolution 4200
                            Kemppi 530 wire feed with MXE panel
                            Kemppi ProCool ( coming soon)
                            Cigweld TransMig 210se
                            Cigweld TransTig 200 AC/DC
                            Hypertherm PowerMax45
                            CutSkill O/A setup
                            Speedglas 9000x adflow
                            Speedglas 9100xx

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                            • #15
                              Hi Larry,
                              Truing a spoked wheel does look like a black art but in reality it is pure logic.
                              If you want to remove a buckle to the left all you have to do is loosen the spokes on the left one or two turns and tighten the spokes on the right side one or two turns in the buckled area.
                              Keep doing this loosen, tighten thing untill the rim is running true in that area, then move on to the next buckle.
                              Pretty simple.
                              The first thing to do is to find out the hub to rim offset, then you can true the wheel and the rim should be on the centre line with the bike.

                              Ji
                              Grip it and Rip it

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