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Budget Parts-Bin Bultaco

This is a discussion on Budget Parts-Bin Bultaco within the Project Builds forums, part of the Caferacer.net Forums category; Originally Posted by Cyorg When you have a moment, any chance you could post a close up photo or two of the brackets etc that ...

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Thread: Budget Parts-Bin Bultaco

  1. #311
    Senior Member Tanshanomi's Avatar
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    Quote Originally Posted by Cyorg View Post
    When you have a moment, any chance you could post a close up photo or two of the brackets etc that attach to the swing arm pivot? Please and thank you.
    Sorry it took so long for me to get back with you. It's really not terribly sophisticated. I just made up two spool spacers with an ID that's a slip fit on the pivot bolt, and a flanged side that's a snug push fit into 3/4" holes already provided in the jig bracket. I faced it on the lathe, so as long as the spacer is up against the spacer plate, the pivot bolt is level and perpendicular. The jig plate comes with a relatively thick epoxy or enamel coating, so it goes in the hole with a little bit of twist and stays put.



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  2. #312
    Senior Member Cyorg's Avatar
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    No worries and thanks, it's appreciated. Decided I'm going to use pillow blocks (because I have them), mounted to some HSS and bolted to the shop floor. I'll pour some epoxy into a mini cofferdam , which is self levelling and then bolt the jig on top. Learned about the epoxy when installing transducers in boat hulls and it's why my deck railing actually looks straight. Absolutely nothing wrong with string and plumb bobs, but there are some interesting laser bore sighters out there that you can incorporate into your setup. Not necessary... but can come in handy depending on what you're doing. In your case, just make the holders 12 gauge. You may be happy to know that these are actually being pressed into service.

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    "Non urinat in ventum"

  3. #313
    Senior Member Tanshanomi's Avatar
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    Quote Originally Posted by Cyorg View Post
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    Looks like CBX550F? Are you in the States?

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  5. #314
    Senior Member Cyorg's Avatar
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    Quote Originally Posted by Tanshanomi View Post
    Looks like CBX550F? Are you in the States?
    No, although I frequent your lovely country on a semi regular basis. I live just north of the 49th. I've had the wheels and forks since the early 80's in the "some day I will use that" pile. That day has finally come. I'm regretting that I gave the swing arm assembly with linkage and shock to a friend who rode one forever and then gave the bike to his son. It went to a good home, but...


    and yes CBX550
    "Non urinat in ventum"

  6. #315
    Senior Member Tanshanomi's Avatar
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    I still want to find a CBX550F hub to convert to wire spokes.


  7. #316
    Senior Member Tanshanomi's Avatar
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    Speaking of CBX400/550F, my favorite fairing ever. I love round headlights.

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    There are a couple on Ebay, but they're $750+ from Japan.

  8. #317
    Senior Member Cyorg's Avatar
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    Quote Originally Posted by Tanshanomi View Post
    I still want to find a CBX550F hub to convert to wire spokes.

    That did cross my mind and I had a look at them to see what it would take to turn out some spoke flanges.... I just happen to have a dividing head. Some folks would say it's cake decorating, but they do look cool and would do it if I had more time. I need to try and keep it simple, so not on the slate at this point The object is to get a running lump and if it turns out that I like it, then I can go back and and give it a second look.
    Tanshanomi likes this.
    "Non urinat in ventum"

  9. #318
    Senior Member XB33BSA's Avatar
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    i was all into the stringline for getting rims inline getting vertical etc
    i was even telling othders \bah use stringlines
    i had h arley knucklehead crank flywheelss to makem taiught bla bla
    then in the end i did a stupid and forgot to write down or keep track of my rear axle spacers doh
    this last time i used straight edges of steel no string for me its better ymmv
    gently clamping them either side of a dead true rim with 1/2'' or so spacers
    after all the welding is done you most likely will need a pull or 2 for final trueness
    gaps at weldements are an oportunity for weld distortions
    nice work enjoying looking at it i am

  10. #319
    Senior Member Tanshanomi's Avatar
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    Well, THIS is an interesting setup...

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  11. #320
    Senior Member Tanshanomi's Avatar
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    Seven years of more-or-less random suspension purchases. And not one of them really suitable for this project, either as a mono or twin setup.


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