Disc brakes on /2 Earls Forks

Discussion in 'Old's Cool' started by airheadpilot, Apr 14, 2008.

  1. airheadpilot

    airheadpilot Le Poulet du Désert

    Joined:
    Dec 8, 2005
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    286
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    near San Francisco
    I'm screwing around with a project bike - basically building an airhead entirely from parts. Since it was never a whole bike, I don't feel too obligated to stick to anything that could be described as "original." I had planned on using 1981-1984 forks with heavily modified internals because I'd like to run wire wheels but I want the stopping power of the Brembos. But then I stumbled across a good deal on a straight /2 Earls front end - missing the shocks and the wheel. I love the way my stepdad's R60/2 rides with the Earls fork, and am thinking that might be fun to play around with, but I still want the braking power of dual Brembos. I've seen them in the past so I know it's been done. Anyone out there have good photos of a BMW Earls fork front end modified to run dual calipers? Better yet, has anyone done it and can give me an idea of the level of fabrication required, beyond just welding the tangs for the calipers on the bottom of the swinging arm? Maybe nothing comes of it, but I'm having fun thinking outside of the box.

    Thanks!

    Andrew
    1970 BMW R50/5 project bike
    1971 Moto Guzzi V750 Ambassador
    1972 BMW R75/5
    2000 Honda XR650R dual sport
    2003 Suzuki Burgman 400 wife's bike
    2005 Yamaha FJR1300A
    #1
  2. Solo Lobo

    Solo Lobo airhead or nothing

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  3. airheadpilot

    airheadpilot Le Poulet du Désert

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    Actually, that's very helpful. I was thinking of using Brembos from a post-1980 airhead, but it's basically the same idea. What that shows me is that the Earls will fit up to a /5 headstock and that a later wheel (I'm thinking a /6 hub with dual discs) will fit, albeit it with possibly some futzing (technical term) with the axle and bearing preload.

    Thanks!

    Andrew
    #3
  4. Uncle Ernie

    Uncle Ernie Long timer

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  5. RocketJ

    RocketJ Been here awhile

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    Nov 29, 2005
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    674
    The calipers will hit the spokes, unless you find a rare 100CS wire wheel, some R65(?) hubs or those from a G/S. The /6 and 7 hubs won't work.
    #5
  6. Hennepinboy

    Hennepinboy Have battery will travel.

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  7. JohnTM

    JohnTM I suck toes

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  8. Tony Collett

    Tony Collett n00b

    Joined:
    Dec 6, 2011
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    2
    Have just completed doing this Disk Brake conversion. Not that difficult, just not to be rushed. If you need some pointers, I can help as there are many ways to skin this cat. Happy Trails, My email is : tony.collett@shaw.ca
    #8