1973 R75/5 Rebuild Project Journal

[brook.reams]

I'm rebuilding my wife's 1973 BWM R75/5 with 97,500 miles. I documented how I restored the Bing carburetors with photos and procedures plus a Bing exploded view of the carbs as a guide. Enjoy.

http://brook.reams.me/2013/01/04/197...r-restoration/

I'll be posting more material as the project progresses.

[RCOCKRUM]

Fantastic rebuild documentation. Thank you so much. I'm in the process of restoring a 1974 R90/6 with a Velorex 562 sidecar. Your post comes along at just the right time.

[Radar41]

I'm rebuilding my wife's 1973 BWM R75/5 with 97,500 miles. I documented how I restored the Bing carburetors with photos and procedures plus a Bing exploded view of the carbs as a guide. Enjoy.

http://brook.reams.me/2013/01/04/197...r-restoration/

I'll be posting more material as the project progresses.

VERY NICE photo's! R75's are awesome .

[88bmwjeff]

Great documentation on the rebuild. I have only one comments. The screws are peened on the butterfly to prevent them from accidentally backing out and getting sucked into the engine. As such, the backs of the screws need to be filed down to prevent stripping the threads on the throttle shaft. DAMHIK The shafts themselves are not very expensive ($10-15ea), so it's not the end of the world if you do strip them.

When installing the new screws, they should be peened or others (including myself and the OP) have used loctite. According to the experienced people/guru's I've talked to blue loctite is more than adequate for this application. Red loctite, I've been told, is overkill in this situation. Some people do not recommend using loctite, and peen their screws.

Anyway, great write up and keep up the rubber side down.

[brook.reams]

Jeff,

You are absolutely correct on the peening of the screw. Preventing them from mangling the threads in the throttle shaft makes perfect sense.

Red loctite is "permanent" locktite IMHO :-)

You are correct about the shaft (13 11 1 336 585) being pretty inexpensive.

Thanks for reading this over and providing your input.

Best.
Brook.

Great documentation on the rebuild. I have only one comments. The screws are peened on the butterfly to prevent them from accidentally backing out and getting sucked into the engine. As such, the backs of the screws need to be filed down to prevent stripping the threads on the throttle shaft. DAMHIK The shafts themselves are not very expensive ($10-15ea), so it's not the end of the world if you do strip them.

When installing the new screws, they should be peened or others (including myself and the OP) have used loctite. According to the experienced people/guru's I've talked to blue loctite is more than adequate for this application. Red loctite, I've been told, is overkill in this situation. Some people do not recommend using loctite, and peen their screws.

Anyway, great write up and keep up the rubber side down.

[brook.reams]

Cool beans. Glad this was timely. Check out the the other post I added today with the documentation for the rebuild of a 1975 R75/6. Could be some things their that are useful.

Best.
Brook.

Fantastic rebuild documentation. Thank you so much. I'm in the process of restoring a 1974 R90/6 with a Velorex 562 sidecar. Your post comes along at just the right time.

[brook.reams]

Folks,

I just posted material from my experience rebuilding and refinishing the forks on ny wife's 1973 R75/5.
http://brook.reams.me/category/mc-rebuilds/

Here's a look at before, and after.


Getting Started


Sliders Disassembled


Rebuilt and Refinished

Enjoy. Feel free to add any comments and tips to the my project web page if you wish.

[RoboRider]

Nice. I have some /6 forks to do and I will read your thread.

[8ninety8]

Plus on your work, the clean work space and the great web page.

[brook.reams]

Plus on your work, the clean work space and the great web page.

Thanks for the kind words. It takes me 1/2 as long to work on a project if I don't have to keep looking around for what I need. And as I get older, I have to look around much longer to find stuff I just had in my hand ..

[RoboRider]

What's on your floor? Is that rubber mat? Expensive?

[brook.reams]

What's on your floor? Is that rubber mat? Expensive?

Hi Rob,

I got this from these folks in Grand Junction, CO., Garage Flooring, LLC.
http://www.garageflooringllc.com/blt-garage-floor-mat/

The BLT product is available from a number of distributors. I bought a 9' x 20' roll @ $425 plus $21 shipping.

It makes the shop quieter, it keeps parts from bouncing as much so they don't richochette into some dark corner, and it makes it very easy to clean up oil and grease. A drawback is when you put a bike on the center stand for awhile, it makes a dent in the mat. I had some spare scraps and used a small piece under the center stand at first, but then I found aluminum diamond tread at a local outlet and picked up a couple 0.125" by 1' x 2' sheets that I use under my bike's center stands and a 2' x 2' sheet I use near my work bench. I picked it up from these folks who are in Denver, CO. I suspect you can find a local supplier near you.
http://www.cutsmetal.net/

The mat and aluminum diamond tread works great. As you can see, I have my R1150-RS apart right now getting the Ohlin's shocks rebuilt.

IMG_3599.jpg

IMG_3600.jpg

[brook.reams]

Folks,

I just published a new web page for the project on this topic. Here's the blog post with link to the web page showing detailed pictures
http://brook.reams.me/2013/02/17/197...and-electrics/

Here are a couple pictures.


Starter Relay Wiring


Taillight Shell Wiring Detail


Rotting Wire Loom Routing Detail

All the web pages for this project are listed on the right side of my site with short summaries in the MC Build Projects category page.
As always, comments, tips, tricks and "did you know you could have ..." comments are welcome. Feel free to post them on the web page.

I hope you find this information helpful.

Best.
Brook Reams

[kentuvman]

Thanks Brook - freshening up a '73 R60/5 & taillight frame needs repainting - was a little alarmed when I sar all rose wires crammed in the receptacle!

[brook.reams]

Thanks Brook - freshening up a '73 R60/5 & taillight frame needs repainting - was a little alarmed when I sar all rose wires crammed in the receptacle!

Hi Ken,

Indeed, but wait until you look inside that headlight shell. I'm going to leave well enough alone and stay out of that rats nest as best I can. :-)

Best.
Brook.