R80 G/S rear brake options?

Discussion in 'Old's Cool' started by Easy E, May 7, 2011.

  1. Easy E

    Easy E Adventurer

    Joined:
    Mar 29, 2007
    Oddometer:
    43
    Location:
    Central Coast, CA
    I started thinking of how to build up the existing lining...metal deposition.
    Seems like plasma spray could be a candidate, as it can be applied up to 5mm thick & there's a variety of alloys they can spray on various substrates...then turn down to desired thickness/smoothness.

    A batch deal might be the way to go...to get a good price?
    Anybody have a tired old '84-ish R80 hub they want to part with or sell cheap...so I can try to find a company that will take a shot at it?

    I've contacted these guys (on 8/24/11 10:30)...waiting for answer.
    http://www.flamesprayusa.com/solutions.php

    Cheers,
    E
    #21
  2. woodgrain

    woodgrain In-Dented Savant

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    east of Scarbaria
    :ear

    Woodgrain
    #22
  3. Easy E

    Easy E Adventurer

    Joined:
    Mar 29, 2007
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    Central Coast, CA
    Ok...

    At first he didn't want to try...but after a little nudging...here's what he said:
    " We need a contaminant free part that will accept the masking and coating properly. If you want to send a photo of your specific part or the part itself we can review it and offer pricing to you based on its condition and requirements. "

    If anyone has a drum laying around they can loan out...we're in business. Bead or soda blasted would be great.
    Anyone have one? I just had my rims rim re-anodized & new stainless spokes re-laced...or I would.

    If nobody has one to spare...if one of you guys have a drum to clean up & take some hi-res pics of...that's the next best thing to him holding the part.

    I've already given him a pic of a new drum...so he wants to see exactly what he'd really be dealing with.

    Thanks,
    Evan
    #23
  4. Easy E

    Easy E Adventurer

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    Central Coast, CA
    Chris at Woody's Wheel Works got back to me again...after trying to touch base with his contacts regarding relining....no dice.
    He's very interested to see how the prospect of metal deposition pans out & he sees the basic issue as a growing one, as bikes age & parts become less available.

    I'm still looking for a hub to send out to the plasma sprayer.

    Thanks,
    Evan
    #24
  5. ontic

    ontic

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    Bumping old thread.
    Seems like an issue a lot of us are going to have to confront at some point.
    Any news?

    Oh yeah, and need to move to airheads
    #25
  6. Easy E

    Easy E Adventurer

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    The company mentioned in post #21 was willing to give it a shot. I didn't have a spare hub/wheel to provide. Need to find a (worn) spare hub...willing to donate to the cause.
    I've parted with all my cycles since my last post. Fixin' up a '58 VW Bus now.
    Cheers,
    - E
    #26
  7. alvise

    alvise n00b

    Joined:
    Feb 3, 2013
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    4
    Hi, any news or ideas?
    I come from Italy, after more that 300k on my r80 g/s 1982 in Africa, Europe and Asia I move to Canada, left the bike in the barn hoping one day to start riding again. Now my friend manage to put everything together, back in the saddle and running around the farm like new. When i try to do the safety inspection to put a plate on they say that the drum is wear over the limit and didn't pass inspection :-(
    According to the shop manual Brake drum dia. 200mm (7.874")
    MAX PERMISSIBLE BRAKE DRUM WEAR DIA. 201.5mm (7.933")
    my now is down (or up) to 202.96.
    I was hoping to build up, you need only 1.4mm, dosn't sound too much to me...
    I would like to fix the problem (I hope to go to south america one day ...) my cheap option is to borrow a rear wheal for the inspection day :-) anybody around Calgary (AB) :-D .
    I have lots of part from another r 80 g/s but not the drum.
    If someone need some parts ask maybe i have one.
    bon route
    #27
  8. Easy E

    Easy E Adventurer

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    Central Coast, CA
    Hey guys,
    I sold my bike a while back.... someone else needs to pick up the ball.... from post #21 & #23.
    Cheers,
    E
    #28
  9. RonZacapa

    RonZacapa Adventurer

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    Mar 12, 2011
    Oddometer:
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    Location:
    Durban - East Coast of Africa
    Got a newish (hopefully! - havnt seen it yet) rear mag wheel coming up from Cape Town next week. Same story as in how many miles will the standard hub go and still function after 3 decades of (ab) use? Seems the easier route to go as in just replacing the whole wheel seeing that it cost me R 350 - about 40$.
    My current rear wheel hub has a lipped edge of note but I havnt bothered to measure it, theres still proper metal there but its most probably out of (conservative) BMW specifications. I use mostly front brake anyway:pynd
    Already thinking whats to stop a decent engineering shop to turn out the existing liner on a lathe and heat shrink a new sleeve into it??
    #29
  10. Airhead Wrangler

    Airhead Wrangler Adios Mexico

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    Because the liner is cast into the hub. You can't remove the liner or press a new one in without cutting out a lot of the hub. This isn't such a problem for the mono road bikes as new wheels are still available from BMW. If you want to switch to spoked wheels, the R100GS hub (plentiful and cheap) can be modified to fit your final drive. The G/S crowd is stuck though as 3 lug mono hubs aren't available new and there are very few in circulation and nothing that can be readily modified to fit.
    #30