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Thread: 1973 R75/5 Rebuild Project Journal

  1. #76
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    I may have missed it

    Can you tell me just how you got the engine, trans and final drive cases looking so good. I toss the /2 stuff in the bead blaster and they look good but my later "airhead" cases just don't get the same pop. PM me if you want I just want to know what you do, your pictures are proof you know what your doing.

  2. #77
    Administrator 20774's Avatar
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    Quote Originally Posted by 69ZEFF65 View Post
    Can you tell me just how you got the engine, trans and final drive cases looking so good.
    Possibly his blog has more about this process. Read what he says on this previous post:

    http://www.bmwmoa.org/forum/showthre...l=1#post869403
    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!

  3. #78
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    Quote Originally Posted by 69ZEFF65 View Post
    Can you tell me just how you got the engine, trans and final drive cases looking so good. I toss the /2 stuff in the bead blaster and they look good but my later "airhead" cases just don't get the same pop. PM me if you want I just want to know what you do, your pictures are proof you know what your doing.
    Was wondering the same thing. After looking at the pictures, I'm not sure if it's the Folgers coffee, or the Cool-Whip...that does the trick

  4. #79
    B Reams brook.reams's Avatar
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    Quote Originally Posted by 20774 View Post
    Possibly his blog has more about this process. Read what he says on this previous post:

    http://www.bmwmoa.org/forum/showthre...l=1#post869403
    69ZEFF65, Kurt and 71243,

    "...Folgers Coffee or Cool Whip "

    Kurt provided a link to a write-up about what I did for the transmission to refinish some of the parts. I've gotten multiple questions on what I do, so this seems to be a topic of interest.

    I'm thinking about putting together a write-up on how I refinished various parts. It would summarize the products, approach and time required.

    But, I can reveal the secret of my technique: It is Jazz and elbow grease (not Folger's and Cool Whip). Listening to music, and spending time gets the luster back. The solvents and cleaners are helpful, but you have to keep at it.

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

  5. #80
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    1973 R75/5 Rebuild, Installing Rear Brakes, Battery Box and Wheel

    Folks,

    Some more progress on this rebuild. The new brake shoes are installed in the rear drive along with the powder coated battery box and refinished rear wheel with new stainless steel spokes.

    Here's my write-up on this part of the project.

    And a couple pictures from the write-up.

    Rear Brake Parts
    Rear Brake Parts

    Hanging Bottom Shoe from Top Shoe
    Hanging Bottom Shoe from Top Shoe

    Rear Brake Pivot Pin with Hardware
    Rear Brake Pivot Pin with Hardware

    Brake Light On
    Brake Light Switch

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

  6. #81
    Registered User R100RTurbo's Avatar
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    Your work is a real pleasure to read/ view.
    Perhaps a trick of the camera lens, but is your rear wheel axle shaft bent slightly?

  7. #82
    B Reams brook.reams's Avatar
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    Quote Originally Posted by R100RTurbo View Post
    Your work is a real pleasure to read/ view.
    Perhaps a trick of the camera lens, but is your rear wheel axle shaft bent slightly?
    Hi RT100RTurbo,

    Thanks for the kind words.

    Indeed, there is a bit of "fish eye" distortion at the top of that picture. The rear axle is straight.

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

  8. #83
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    Brook, you been wrenching on Airheads quite a while? I dearly wish I could even attempt what you are doing.
    Beautiful work there. Wow. You ever get to East Coast of Florida? Ha.

  9. #84
    B Reams brook.reams's Avatar
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    Quote Originally Posted by captainmako21 View Post
    Brook, you been wrenching on Airheads quite a while? I dearly wish I could even attempt what you are doing.
    Beautiful work there. Wow. You ever get to East Coast of Florida? Ha.
    Hi captianMako21,

    Thank you for the kind words.

    I've owned airheads since 1975 and picked up a bit here and there, but most of it was routine service work. My edumacation in rebuilding really started in 2010 as a result of a desire to reconnect doing with thinking. I felt I had lost that balance over the years. I had just turned 100,000 miles on my first BMW a 1975 R75/6, the "Grey Ghost", and I thought rebuilding that bike would be a good way to get the balance back. Well, it was. And now, rebuild #2 is making progress :-)

    "BEER" oh, well, that's a very strong inducement to ride to Florida as another hobby of mine is home brewing (yeah, another attempt to reconnect doing with thinking with built in rewards) :-)

    Thanks for reading along as this project progress.

    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. #85
    Superkraut typ181r90's Avatar
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    Quote Originally Posted by brook.reams View Post
    My edumacation in rebuilding really started in 2010 as a result of a desire to reconnect doing with thinking. I felt I had lost that balance over the years.
    This is the reason I built a maintenance intensive bike for my daughter (now three), I wanted something she could learn to use a wrench with and think mechanically with, then once she fully knows her way around the bike I'll turn the title over. Let's face it, the new generations (mine included) simply don't get an education in these kinds of things anymore (like Matthew Crawford complaining about modern education looking down on shop class and trades) and in another 10 years modern cars are going to be impossible to work on like our airheads. At least my modern VWs still let me wrench a little on them without a computer, and more importantly, have dipsticks, unlike my brother in law's Audi!

    The level of finish on your bike has me thinking about my next build. With my R90, I customized it to my liking (paint, tuning, suspension, etc.), but other than giving a good clean and bit of polish, pretty much left the frame and drive train original, I think going full resto would just drive me nuts as I use the bike on a regular basis all year round. On the next bike I went crazier, but definitely not at this level of finish. Now that my hands are idle once again, I'm thinking of heading in your direction. With the "Grey Ghost," do you find that it's difficult to keep that kind of cleanliness with normal use, particularly in the cylinder fins? I feel like I'd need to use a toothbrush on it after every single ride.

    Also, where'd you buy that neat seal puller?
    // 1975 BMW R90/6 (cafe'd) // 1957 BMW R60 (in pieces) // 1967 Aermacchi/H-D Sprint 250 SS (custom special) // 1973 VW Type 181 Custom SOLD )

    http://symphonyofshrapnel.blogspot.com

  11. #86
    B Reams brook.reams's Avatar
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    Quote Originally Posted by typ181r90 View Post
    ...With the "Grey Ghost," do you find that it's difficult to keep that kind of cleanliness with normal use, particularly in the cylinder fins? I feel like I'd need to use a toothbrush on it after every single ride.

    Also, where'd you buy that neat seal puller?
    Hi Type181R90,

    I included the info on the Lisle shaft seal puller here:
    11 BMW R75/5 Replace Cam Shaft Seal


    And show using it here on the front crankshaft seal:
    11 BMW R75/5 Replace Front Crankshaft Seal

    You raise an interesting point about how to treat a restored bike I spent a year rebuilding and spent $$ on, and which I planned to continue riding when I got done. I came to the conclusion that the rebuild was a journey to be enjoyed for the accomplishment, challenges and learning I received along the trip. Riding is riding, and a series of journeys to be enjoyed for the experience of riding a classic motorcycle. Dirt, stones, nicks and grime come with riding. So over time, I will have an opportunity to "refresh" the Grey Ghost again. I expect to have as much fun then as I did on the original rebuild project, and will learn more in the bargain.

    Thanks for reading the journal about this project.

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

  12. #87
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    1973 R75/5 Rebuild, Install Rear Sub-Frame, Shocks, Key Lock & Seat Latch

    Folks,

    I made great progress on the back end. I wrote up this work here:


    I'm reading up on the front fork installation and elimination of "Stiction" in the Randy Glass and Bob Fleischer documentation. That's where I'm headed next; right after I finish painting and hanging the new downstairs doors. I have to pay the wifely dues every now and then if I want to have "play time" in the shop :-)

    Here's a couple of pictures from the write-up.

    Rear Frame
    Rear Sub-Frame, Upside Down

    Securing Shocks by Lower Shackle
    Securing Shocks by Lower Shackle

    Seat Latch and Lock Hardware
    Key Lock and Seat Latch Hardware

    Lock Retaining Ring on Lock Barrel
    Lock Retaining Ring on Lock Barrel

    Seat Latch Goes Around Key Lock
    Seat Latch Goes Around Key Lock

    Rear Shocks Installed
    Final Product

    Lock & Grab Handle
    Key Lock and Grab Handle Installed
    ---------------------------------
    Brook Reams - Arvada, CO
    Various Two-wheeled Vices, All BMW
    2004 R1150-RS || 2002 F650-GS || 1975 R75/6 || 1973 R75/5

  13. #88
    B Reams brook.reams's Avatar
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    1973 R75/5 Rebuild, Refinishing Techniques

    I've had several questions and Email about how I refinish the rough aluminum casting on the engine, transmission and rear drive and also some questions on how I got the carburetors to look shiny and new again.

    NOTE: Refinishing is not rebuilding. Refinishing is restoring the surface of parts to "like new" condition. You are removing crud, stains, grime, dirt, grease, bugs, corrosion, tar, mud and old gasket sealer that have frequently been baked on for 10, 20, 30 or more years. It takes PATIENCE. It is applied Zen :-)

    So, I put this together:



    Some Before/After pictures from this are below.

    Fork slider details
    Lower Fork Sliders

    After Rebuild & Polishing
    Refinished Front Forks Lowers

    Rear Drive
    Rear Drive with Baked on Stain from Gear Lube

    Refinished Rear Drive
    Refinished Rear Drive

    Transmission Crud
    Transmission

    Refinished Rear
    Refinished Transmission

    Carb & shaft drive gunge
    Air Box and Engine

    Polished Engine
    Refinished Engine Case and Timing Cover

    Before Soak, After Soak
    Before Soak, After Soak

    Cleaned and Polished, Outside View
    Cleaned and Polished, Outside View
    Last edited by brook.reams; 10-23-2013 at 03:22 PM.
    ---------------------------------
    Brook Reams - Arvada, CO
    Various Two-wheeled Vices, All BMW
    2004 R1150-RS || 2002 F650-GS || 1975 R75/6 || 1973 R75/5

  14. #89
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    1973 R75/5 Rebuild, Install and Align Front Forks

    Folks,

    Another project milestone complete. This took some time and patience to get the fork tubes aligned. I also added a modern BMW emblem to the center of the steering damper knob.

    You can read about what I did here:
    • 31 BMW R75/5 Install and Align Front Forks

    I'll work on installing the front brakes and wheel next.

    Here are a couple pictures from the write-up.

    Steering Head after New Bearings Installed
    Steering Head with Steering Stem After New Bearings Installed

    Fork Sliders, Top is Right Side, Bottom is Left Side with Axle Clamp Allen Head Screw
    Fork Sliders, Top is Right Side, Bottom is Left Side with Axle Clamp Allen Head Screw

    Forks Mounted and Lower Sliders Removed Forks Mounted and Lower Sliders Removed

    Positioning Glass on Fork Tubes
    Positioning Glass on Fork Tubes

    Fork Alignment in X-Direction
    Aligning Forks in Y-Direction with 2 x 4 Between Fork Tubes

    X-Plane Measurement at Bottom of Tube
    X-Plane Measurement at Bottom of Fork Tubes

    Clamping Forks Below Yolk to Adjust X-Plane Alignment
    Clamping Forks Below Yoke to Adjust X-Plane Alignment

    Lowers with Fork Brace Installed
    Lowers with Fork Brace Installed

    Install Damper Friction Bracket
    Install Damper Friction Bracket

    Steering Head Grunge & Damper
    Original Steering Head Grunge & Damper Scratches

    Finished Upper Fork Brace with Damper and Handlebar Mounts
    Finished Upper Fork Brace with Damper and Handlebar Mounts


    Polished Damper Knob, Emblem and Polished Upper Brace
    Polished Damper Knob, Emblem and Polished Upper Brace


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

  15. #90
    B Reams brook.reams's Avatar
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    1973 R75/5 Rebuild, Install and Align Front Forks Update

    Folks,

    I decided to add a section to the original write-up to clarify a few things. I hope these additions are helpful.


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

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