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Thread: 1973 R75/5 Rebuild Project Journal

  1. #31
    B Reams brook.reams's Avatar
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    1973 BMW R75/5: Progress Report

    At this stage in the project, the bike is apart. Last week, I took the frame, sub-frame, center stand, battery box halves, headlight ears, license plate bracket and the handlebar controls to Brad at BFN Industries, a local company near me in Arvada, CO.


    Parts for Powder Coating


    Zip Ties Marking Threaded Holes

    You can see more on my progress including the work plan at my web site, 1973 BMW R75/5: Progress Report
    ---------------------------------
    Brook Reams - Arvada, CO
    Various Two-wheeled Vices, All BMW
    2004 R1150-RS || 2002 F650-GS || 1975 R75/6 || 1973 R75/5

  2. #32
    B Reams brook.reams's Avatar
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    1973 R75/5 Parts Back From Powder Coating

    My parts are back from powder coating by Brad at BFN Industries. I wrote a check for $190 and change. I think this was a good price.

    I posted a number of pictures here, 1973 BMW R75/5: Powder Coating Done in my latest blog post.

    Also, I'm posting all the pictures I take here on Flickr --> 1973 BMW R75/5 Rebuild

    Here are some from the blog.

    Faring bracket rust
    Frame Corrosion

    Paint and rust
    Frame Corrosion

    Battery Box Rust
    Battery Box Corrosion

    Left Control Disassembled
    Left Handlebar Perch

    Powder Coat Presents
    Presents from the Powder Coater

    Powder Coat - Controls
    Handlebar Control Perches

    Powder Coat - Frame, Sub-frame
    Frame and Sub-frame
    ---------------------------------
    Brook Reams - Arvada, CO
    Various Two-wheeled Vices, All BMW
    2004 R1150-RS || 2002 F650-GS || 1975 R75/6 || 1973 R75/5

  3. #33
    B Reams brook.reams's Avatar
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    1973 R75/5 Clutch Throw-out Rod Wear

    Here's a link to picture of the throw out rod. I've not seen a new one, so I don't know if the ends look OK or show abnormal wear.
    What's the opinion of the knowledgeable?


    Clutch throw-out rod

    .Clutch throw-our rod
    ---------------------------------
    Brook Reams - Arvada, CO
    Various Two-wheeled Vices, All BMW
    2004 R1150-RS || 2002 F650-GS || 1975 R75/6 || 1973 R75/5

  4. #34
    Registered User dmftoy1's Avatar
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    1973 R75/5 Rebuild Project Journal

    I'd say you did good price wise on the powder coating. I got the "family" discount last fall and paid $150 just for frame and subframe. I'm guessing I'd have been over $200 for what you did

  5. #35
    Administrator 20774's Avatar
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    Pushrod

    Brook -

    I'd say the pushrod tip looks fine. The aft end, though seems unusual with the wear right next to the step. Not sure why it would do that. If that allowed any sideways movement of the race and/or bearings, it might be worth a replacement.
    Kurt -- Forum Administrator ---> Resources and Links Thread <---
    '78 R100/7 & '69 R69S & '52 R25/2
    mine-ineye-deatheah-pielayah-jooa-kalayus. oolah-minane-hay-meeriah-kal-oyus-algay-a-thaykin', buddy!

  6. #36
    Registered User lmo1131's Avatar
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    Hey Brook. I see lots of parts but I don't see control perch wedges; referred to in an old thread on this site as the Triangular Thingy Doofer (TTD).

    They get lost early on in the life of most old airheads. Sometimes the perch will grip the handlebars sufficiently not to rotate without them, but sometimes not.
    If you look "inside" the perch you will see a "V" shaped groove molded into the perch at the split line; the wedge slips into this "V" when it is placed on the handlebar. It's a tight fit.
    When I had my perches powder coated the over-spray filled in the grooves just enough that I could not get the wedges back in; I removed the paint to get back down to bare metal.

    The wedge is item #13 on the drawing. P/N: 32 72 2 072 223 - they are listed on many BMW sites as NA (not available), but they are... Hucky has them. They do come dearly.



    The "divot" on the backside allows the pinch-bolt to pass over the wedge.
    The "internal" side is serrated longitudinally (you can see it in the bottom pic) to better grip the handlebar tube.



    Last edited by Lmo1131; 03-08-2013 at 05:16 AM.
    "It is what you discover, after you know it all, that counts." _ John Wooden

    Lew Morris
    1973 R75/5 - original owner

  7. #37
    Monza Blue 1974 R90/6
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    I agree with eagle eye Lew. If you don't have the triangles, get them and put them in. Otherwise, the clamps won't be tight enough, the controls will move, you will find yourself "snugging" them up, and then they will strip.

    One other thing, I'm pretty sure your levers have a nylon bushing where the pivot pin goes through. You can replace the bushings for a dollar or so to tighten up the levers.

    Barron

  8. #38
    B Reams brook.reams's Avatar
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    Quote Originally Posted by Barron_Williams View Post
    I agree with eagle eye Lew. If you don't have the triangles, get them and put them in. Otherwise, the clamps won't be tight enough, the controls will move, you will find yourself "snugging" them up, and then they will strip.

    One other thing, I'm pretty sure your levers have a nylon bushing where the pivot pin goes through. You can replace the bushings for a dollar or so to tighten up the levers.

    Barron
    Lew and Barron,

    Indeed, I hadn't removed the "perch" wedge from the control barrels when I took that picture. But, they are safely squirreled away in the zip-lock bag for each control. Thanks for calling out how critical they are.

    Thanks for the tip about the nylon bushing. I'll look into that.

    Best.
    Brook.
    ---------------------------------
    Brook Reams - Arvada, CO
    Various Two-wheeled Vices, All BMW
    2004 R1150-RS || 2002 F650-GS || 1975 R75/6 || 1973 R75/5

  9. #39
    B Reams brook.reams's Avatar
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    Quote Originally Posted by 20774 View Post
    Brook -

    I'd say the pushrod tip looks fine. The aft end, though seems unusual with the wear right next to the step. Not sure why it would do that. If that allowed any sideways movement of the race and/or bearings, it might be worth a replacement.
    Hi Kurt,

    I'll look at the aft end more closely. Perhaps a new throw-out rod makes sense. Checking Hucky's site:
    23 21 1 230 106 clutch thrust rod / 5 4 speed $ 22.40

    This isn't priced like Germanic Unobtanium :-)

    Thanks

    Best
    Brook
    ---------------------------------
    Brook Reams - Arvada, CO
    Various Two-wheeled Vices, All BMW
    2004 R1150-RS || 2002 F650-GS || 1975 R75/6 || 1973 R75/5

  10. #40
    B Reams brook.reams's Avatar
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    1973 R75/5 Powder Coating Update

    I posted an update about cleaning up any over spray of powder coating. Permatex Gasket Remover works very well.
    http://brook.reams.me/2013/03/07/197...-coating-done/

    Permatex Gasket Remover
    Permatex Gasket Remover

    Put Permatex on Threads of Swing Arm Pivot
    Put Some on the Bolt to Soften Any in the Threads
    ---------------------------------
    Brook Reams - Arvada, CO
    Various Two-wheeled Vices, All BMW
    2004 R1150-RS || 2002 F650-GS || 1975 R75/6 || 1973 R75/5

  11. #41
    B Reams brook.reams's Avatar
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    1973 BMW R75/5 Rebuild: Refinishing Headers, Headlight and Steering Damper

    Over the weekend, I dove into refinishing some of the high profile parts. I documented what I did in separate web pages under the "51" category for "Vehicle Trim". There are lots of pictures showing before and after: here are the links.

    51 BMW R75/5 Headlight Shell and Switch Housing Paint Repair
    51 BMW R75/5 Restoring Header Pipes
    51 BMW R75/5 Refinishing Steering Damper Knob

    Headlight Shell Restoration


    97,553 miles, 2 owners
    Headlight Shell After 40 Years, 97,553 miles

    Headlight Shell Underside Detail
    Headlight Shell Underside Grunge

    Headlight Paint - Like New
    Headlight Paint Repair - Like New Again

    Refinished Switches
    Restored Switch Assemblies

    Header Restoration


    Header with 40 Years of Bluing
    Header with 40 Years of Bluing

    Header with 40 Years of Bluing
    Header with 40 Years of Bluing

    Header with 40 Years of Bluing
    Header with 40 Years of Bluing

    Header Cleaned & Polished
    Restored Header Clean & Polished

    Header Cleaned & Polished
    Restored Header Clean & Polished

    Steering Damper Restoration


    Steering Head Grunge & Damper
    Steering Damper Dings and Steering Head Grunge

    Steering Head Polish $4
    Steering Head After Polish #4
    ---------------------------------
    Brook Reams - Arvada, CO
    Various Two-wheeled Vices, All BMW
    2004 R1150-RS || 2002 F650-GS || 1975 R75/6 || 1973 R75/5

  12. #42
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    Brook, I haven't heard back from the guy in Lou,KY that had his bike striped but I'm going to the same guy after I paint my fenders-tank stripes I'm still deciding as I change my mind back/forth on those. The blinker switches-did you spray clear on the levers?
    Last edited by kantuckid; 03-20-2013 at 08:48 PM.
    "If I had my life to live over, I'd dare to make more mistakes next time...I'd relax,I'd limber up... I would take fewer things seriously...take more chances... take more trips...climb more mountains...swim more rivers...eat more ice cream." Jorge Luis Borges at age 85.

  13. #43
    B Reams brook.reams's Avatar
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    Quote Originally Posted by kantuckid View Post
    Brook, I haven't heard back from the guy in Lou,KY that had his bike striped but I'm going to the same guy after I paint my fenders-tank stripes I'm still deciding as I change my mind back/forth on those. The blinker switches-did you spray clear on the levers?
    Hi Kentuckid,

    The clutch and brake levers are just polished, no clear coat. I hadn't thought about putting clear coat on them. The switch housings also have no clear coat. That's the level of gloss in the Dupli-color Universal Black touch up paint.

    Keep me posted on the stripes.

    PS: What did you teach when you taught?

    Best.
    Brook.
    ---------------------------------
    Brook Reams - Arvada, CO
    Various Two-wheeled Vices, All BMW
    2004 R1150-RS || 2002 F650-GS || 1975 R75/6 || 1973 R75/5

  14. #44
    B Reams brook.reams's Avatar
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    1973 R75/5 Renewing Cylinders, Valve Covers & Heads

    I wrote up a web page on this and here is the link.

    I sent the cylinders, valve covers and exhaust nuts for bead blasting to a local shop in Arvada, CO, Roadies Performance, that does bead blasting for me, and send the heads for a complete rebuild to Randy Long.

    Here is a sample of the pictures I took and there are more in the web page.

    Bead Blasted Cylinders, Valve Covers and Exahaust Nuts
    Bead Blasted Cylinders, Valve Covers and Exhaust Nuts


    Rebuilt Heads
    Rebuilt Heads by Randy Long

    Airbox Covers, Before Polish & After
    Air Box Covers, Before & After Clean Up
    Last edited by brook.reams; 03-24-2013 at 07:55 PM.
    ---------------------------------
    Brook Reams - Arvada, CO
    Various Two-wheeled Vices, All BMW
    2004 R1150-RS || 2002 F650-GS || 1975 R75/6 || 1973 R75/5

  15. #45
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    Nice work!
    What did you use on the headers?

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