Author Topic: 1975 CB750 K5 cafe build - first bike, first build - almost there!  (Read 110075 times)

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Offline the architect

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Re: 1975 CB750 K5 cafe build - first bike, first build - almost there!
« Reply #175 on: February 23, 2011, 03:59:38 PM »
I appreciate all the warm sentiments from the board  ;D  So, I figured I better get back to posting some progress photos.  I'm actually further along than this, so here's more to come, but here are the ones I had in my camera and available to upload today.


09.27.10  - A day that I will never forget.  This is what I left behind as the ambulance drove me to the hospital. 


001



This is what a year's worth of blood, sweat and hard work looks like after suffering just a split-second of another human being's negligence.


002



Adding insult to injury.  The wrecker driver was kind enough to break the dampening adjuster lever off my right rear shock by carelessly hooking his giant hook at an inopportune location.  The cop, as seen in the background, could barely read or write.  His police report had some key facts wrong and was rife with mis-spellings and grammatical errors. 


003



Sigh.
She doesn't look so straight anymore.  This is a straight-ahead, head-on photo.


004



Somehow, my plastic headlight bucket didn't break.  Instead, the aluminum headlight brackets sheared right off.  What is 1970's-era plastic made of, anyway?


005



I discovered later that one of the factory seams on the tank (near the tunnel) even split.  The handlebars were bent in on themselves.  Both levers were broken.  The left handlebar control was crushed into the tank.  Needless to say, my mirror didn't survive, either.


006



New left-hand controls are needed.


008



The stator cover and case have been ground on the asphalt.  The bright side: my engine paint seems to be holding up well.  I'll definitely use it again.


007



Wow.  It took some serious force to bend the chain adjuster.  It didn't get hit directly by anything - just transmission of forces taking its toll, here.


009



I have custom knee indents, now - made by my very own knee and arm.  You can see one of my 350 projects in the background (CL350)  ;D


010



Electrolytically cleaning the inside of the new (old) gas tank I scored off eBay.  The tank is filled to the brim with a conductive solution of sodium carbonate (not sodium bicarbonate) and water.  The sacrificial anode (the piece of rebar, here) must be suspended and cannot touch and metal inside the tank, which explains my strange combination of holders, clamps and counterweights.


012



12 volts feed the process.  My puny charger can only put out 6 amps at 12 volts.  A bigger charger would speed the process.  The anode (rebar) gets the positive end and the tank itself gets the negative.  This process breaks the surface bond with anything that's stuck to the tank, including rust, paint, fuel varnish, etc.  In my case, some mild rust and too many years of gas varnish build-up.


011



This is what I'd find daily.  I cleaned the anode off with a wire wheel once daily.  Hook everything back up.  Come back the next day.  Do it again.  I did this for a couple of weeks.  Did I mention that a bigger output charger would have sped things up?


013



Yep.  That's the muck that's been coming free.  Interior tank photos are hard to take.  But take my word for it.  After a couple weeks using this process (which does not degrade the tank metal in any way, btw), the inside looks practically brand new, showing a dull, metal appearance.  I rinsed the inside thoroughly with water (multiple rinses), dried it with compressed air, dried it more with acetone (to help drive out any residual water), again with conpressed air and finally fogged the inside with WD-40.  That should prevent flash rust until I'm done painting and ready to fill it with gas.


014
Rider no. 83 on the 2013 SOHC/4 Honda World Tour
Rider no. 228 on the 2012 SOHC/4 Honda World Tour
Rider no. 70 on the 2011 SOHC/4 Honda World Tour

my '75 CB750 cafe build photo documentary:  looking for the Lone Stars is like playing Where's Waldo -- enjoy.
http://www.flickr.com/photos/34828040@N05/sets/72157615892537535/

CB350 twin, rigid meat grinder:
http://www.flickr.com/photos/34828040@N05/sets/72157627005176764/

Blip Workshop
http://www.blipworkshop.com
http://www.facebook.com/blipworkshop

Offline knowsnothing

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Re: 1975 CB750 K5 cafe build - first bike, first build - almost there!
« Reply #176 on: February 23, 2011, 04:47:49 PM »
  It's nice to see you back in action. :D
1978 CB750k Green - 811 engine
1978 CB750k Blue - for sale
1974 CB375F Faded Black - had to have that 6th gear
1976 CB400F Red - in many pieces
1973 CB350F TBD - in many pieces

Offline sangyo soichiro

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Re: 1975 CB750 K5 cafe build - first bike, first build - almost there!
« Reply #177 on: February 24, 2011, 09:01:20 AM »
Glad you're back at it, Architect. 
1974 CB 750
1972 CB 750 http://forums.sohc4.net/index.php/topic,57974.0.html
1971 CL 350 Scrambler
1966 Black Bomber
Too many others to name…
My cross country trip: http://forums.sohc4.net/index.php/topic,138625.0.html

Offline DanielB

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Re: 1975 CB750 K5 cafe build - first bike, first build - almost there!
« Reply #178 on: February 24, 2011, 08:27:56 PM »
Good to see you posting again Chris! Can't wait to see the final product.
1977 CB550K - Project Thread: http://forums.sohc4.net/index.php?topic=80164.0

Other toys: 2003 Cobra | 2002 WS6

Offline desert rat racer

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Re: 1975 CB750 K5 cafe build - first bike, first build - almost there!
« Reply #179 on: February 25, 2011, 02:42:04 PM »
Looking forward to seeing the resurection!

Offline albertaboy

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Re: 1975 CB750 K5 cafe build - first bike, first build - almost there!
« Reply #180 on: February 25, 2011, 02:56:39 PM »
Looking at the bend in your upper forks and how tweaked your chain adjuster is, I'd guess your frame must be bent somewhere, no?  Regardless, i look forward to seeing how your repairs come along.  Cheers.
1975 CB750K
No where to go and all day to get there.
My build thread: http://forums.sohc4.net/index.php?topic=131424.0

Offline wannabridin

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Re: 1975 CB750 K5 cafe build - first bike, first build - almost there!
« Reply #181 on: February 25, 2011, 03:05:04 PM »
hey man!!  i have some extra chain adjusters and i THINK a left hand control.  they could prolly use some cleaning up, but i'll gladly send them your way.  tell me all the little things you need and i'll help donate to the cause!!   ;D
1976 CB750K, currently under construction:
http://forums.sohc4.net/index.php?topic=64468.0

-And if you don't do it this year, you'll be one year older when you do...

Offline Mayor08

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Re: 1975 CB750 K5 cafe build - first bike, first build - almost there!
« Reply #182 on: February 25, 2011, 06:32:02 PM »
YES great idea!  tell us what you need no matter how small or how big and people can donate/prorate as they see fit.

You're certainly welcome to anything I've got!
Scottish ex-wife Brit Mistress

Offline Roach Carver

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Re: 1975 CB750 K5 cafe build - first bike, first build - almost there!
« Reply #183 on: February 26, 2011, 04:59:13 PM »
great idea. You should'nt need to ebay any small parts.

Offline Old75_ratafe

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Re: 1975 CB750 K5 cafe build - first bike, first build - almost there!
« Reply #184 on: February 26, 2011, 11:32:25 PM »
Awesome I've been kicking around using that eltrolisys technique on my crash guards.  Have two questions fro you man.  One what paint did you end up using on the engine?  And two what did you end up using for the dip sodium solution.  I was told arm and hammer laundry detergent (powder form) works good but I may have that wrong.
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Offline wannabridin

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Re: 1975 CB750 K5 cafe build - first bike, first build - almost there!
« Reply #185 on: February 27, 2011, 09:03:00 AM »
His engine is done in rustoleum engine enamel cast iron
1976 CB750K, currently under construction:
http://forums.sohc4.net/index.php?topic=64468.0

-And if you don't do it this year, you'll be one year older when you do...

Offline Old75_ratafe

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Re: 1975 CB750 K5 cafe build - first bike, first build - almost there!
« Reply #186 on: February 28, 2011, 12:38:50 AM »
His engine is done in rustoleum engine enamel cast iron

Ty wanna.  Duh that's right I remember now cause I think I chimed in on that one cause I used it on my tank and all the chrome that was to far pitted.
1975 CB750K
Project Back in Black

Sent from my Texas Instruments TI99/4A Computer

Offline the architect

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Re: 1975 CB750 K5 cafe build - first bike, first build - almost there!
« Reply #187 on: February 28, 2011, 09:23:36 AM »
His engine is done in rustoleum engine enamel cast iron

Ty wanna.  Duh that's right I remember now cause I think I chimed in on that one cause I used it on my tank and all the chrome that was to far pitted.

Thanks for chiming in!   ;D  Is is "cast coat iron" engine enamel, made by Duplicolor.  It's been super durable and I love the color.  I'll definitely use it again.  It's held up well on my lower fork tubes, brake caliper, brake master cylinder and (or course) the engine.





Awesome I've been kicking around using that eltrolisys technique on my crash guards.  Have two questions fro you man.  One what paint did you end up using on the engine?  And two what did you end up using for the dip sodium solution.  I was told arm and hammer laundry detergent (powder form) works good but I may have that wrong.

I used ARM & Hammer Super Washing Soda.  It's not the same as laundry detergent, and it took me a while to find it.  I finally locateed it at a local grocery store for ~$1.50 per box.  You only need about 4 tbsp per 5 gallons of water, so it lasts a long time.  A perk:  your parts will smell like fresh laundry afterward  :D





Looking at the bend in your upper forks and how tweaked your chain adjuster is, I'd guess your frame must be bent somewhere, no?  Regardless, i look forward to seeing how your repairs come along.  Cheers.

This has been the topic of many conversations.  From the naked eye, it's hard to tell.  You'd think it would have to be bent (I thought so, anyway). The forks were toast.  The upper and lower triples were both bent.  The chain adjuster . . .  And there are a couple of spots at joints/connections where the powdercoat cracked slightly.  But, at the end of the day, I can't find any reliable points to measure for verification, a friend who owns a bike shop specializing in vintage machines believes it to be straight (or at least straight enough  ::) ), and it's no race bike.  So, I decided to put her all back together and go from there.  I've heard that the type of steel these older bikes are made from tends to be more elastic (to a point) than newer bikes, and have a tendencey toward resilience - this came from a car/bike enthusiast friend who's also an engineer.  But, we'll just have to wait and see how it feels once I get her going.



YES great idea!  tell us what you need no matter how small or how big and people can donate/prorate as they see fit.

You're certainly welcome to anything I've got!

You see -- this is whay I love this place!  ;D  Your generosity, as well as everyone who has offered up parts, is very much appreciated.  Once I felt good enough to be moving around, I started to (slowly) collect the parts I needed.  At this point, I think I have everything now to finish her up.  I even have the new clutch, chain and sprockets I ordered the week before my accident  :-\

If any random bit comes up needed, I know who I'll go to first - thanks, guys!  ;D
« Last Edit: February 28, 2011, 09:30:25 AM by the architect »
Rider no. 83 on the 2013 SOHC/4 Honda World Tour
Rider no. 228 on the 2012 SOHC/4 Honda World Tour
Rider no. 70 on the 2011 SOHC/4 Honda World Tour

my '75 CB750 cafe build photo documentary:  looking for the Lone Stars is like playing Where's Waldo -- enjoy.
http://www.flickr.com/photos/34828040@N05/sets/72157615892537535/

CB350 twin, rigid meat grinder:
http://www.flickr.com/photos/34828040@N05/sets/72157627005176764/

Blip Workshop
http://www.blipworkshop.com
http://www.facebook.com/blipworkshop

Offline Artf0rm

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Re: 1975 CB750 K5 cafe build - first bike, first build - almost there!
« Reply #188 on: March 02, 2011, 09:04:28 AM »
First, your bike is beautiful.  I am so glad that you are rebuilding her and keeping us all up to date on your progress.  I hope your wrist continues to progress as well as this rebuild.  I am working on a frame up rebuild of a 76 750 and I am having trouble figuring out how to go about replacing the stock oil pan.  Would you mind sharing your design?  Also, if you wanted to workout a trade / price I would love to have something you built on my bike.

P.S. ~ my girlfriend lives in Houston so I am out there regularly.  Let me know if you need any small parts and I could cart them out there along with some NC BBQ sauce (someone has to teach you guys real BBQ)!

Offline the architect

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Re: 1975 CB750 K5 cafe build - first bike, first build - almost there!
« Reply #189 on: March 02, 2011, 03:02:13 PM »
First, your bike is beautiful.  I am so glad that you are rebuilding her and keeping us all up to date on your progress.  I hope your wrist continues to progress as well as this rebuild.  I am working on a frame up rebuild of a 76 750 and I am having trouble figuring out how to go about replacing the stock oil pan.  Would you mind sharing your design?  Also, if you wanted to workout a trade / price I would love to have something you built on my bike.

P.S. ~ my girlfriend lives in Houston so I am out there regularly.  Let me know if you need any small parts and I could cart them out there along with some NC BBQ sauce (someone has to teach you guys real BBQ)!

I'd be happy to share my tank design.  I'll sketch something up and post it soon. 

I'd be glad to work something out for contributing to your bike, too!  It's interesting that you mention my oil tank.  I've thought about making a few of these as retro-fittable kits for people looking for a slightly different look.  Something fairly low-cost and easy to mount without permanently altering the bike (in case that's a concern).  The design would mount to the frame with p-clamps (frame clamps) and would require reorganizing of the electrical.  A thought, who knows?

But if you are looking for smoething in particular, let's talk  ;D

And I'm always happy to try some new BBQ  ;D  fair warning:  I am partial to Texas-style, so some NC BBQ would have its work cut out for it  ;)
Rider no. 83 on the 2013 SOHC/4 Honda World Tour
Rider no. 228 on the 2012 SOHC/4 Honda World Tour
Rider no. 70 on the 2011 SOHC/4 Honda World Tour

my '75 CB750 cafe build photo documentary:  looking for the Lone Stars is like playing Where's Waldo -- enjoy.
http://www.flickr.com/photos/34828040@N05/sets/72157615892537535/

CB350 twin, rigid meat grinder:
http://www.flickr.com/photos/34828040@N05/sets/72157627005176764/

Blip Workshop
http://www.blipworkshop.com
http://www.facebook.com/blipworkshop

Offline Artf0rm

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Re: 1975 CB750 K5 cafe build - first bike, first build - almost there!
« Reply #190 on: March 02, 2011, 06:05:46 PM »
Awesome, I'll PM you!

Offline the architect

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Re: 1975 CB750 K5 cafe build - first bike, first build - almost there!
« Reply #191 on: March 03, 2011, 09:00:50 AM »
This is how my final version of the oil tank worked out.  I'm going to remake it again, soon.  I have a better setup for welding, now, so I can finally address those issues I was never quite happy with.  And I've been running the tank un-vented, too, btw.  While it hasn't given me any problems, I would advise running some sort of vent (or vented cap).


Rider no. 83 on the 2013 SOHC/4 Honda World Tour
Rider no. 228 on the 2012 SOHC/4 Honda World Tour
Rider no. 70 on the 2011 SOHC/4 Honda World Tour

my '75 CB750 cafe build photo documentary:  looking for the Lone Stars is like playing Where's Waldo -- enjoy.
http://www.flickr.com/photos/34828040@N05/sets/72157615892537535/

CB350 twin, rigid meat grinder:
http://www.flickr.com/photos/34828040@N05/sets/72157627005176764/

Blip Workshop
http://www.blipworkshop.com
http://www.facebook.com/blipworkshop

Offline Really?

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Re: 1975 CB750 K5 cafe build - first bike, first build - almost there!
« Reply #192 on: March 03, 2011, 10:31:29 AM »
Just read what happened.  D00d, how are you doing?
I don't have a motorcycle, sold it ('85 Yamaha Venture Royale).  Haven't had a CB750 for over 40 years.

The Wife's Bike - 750K5
The Kid's Bike - 750K3

Offline the architect

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Re: 1975 CB750 K5 cafe build - first bike, first build - almost there!
« Reply #193 on: March 03, 2011, 04:01:32 PM »
Just read what happened.  D00d, how are you doing?

Hey, buddy -- thanks for asking!  I'm doing pretty good.  The ol' wrist doesn't have the same strengh as before or the same range of motion, but I still think it improves everytime I hit the workshop for some moto physical thereapy  ;D  Maybe a byproduct of my downtime has been too much thinking and searching out new projects.  I seem to acquired (4) CB and CL350's  ::)
Rider no. 83 on the 2013 SOHC/4 Honda World Tour
Rider no. 228 on the 2012 SOHC/4 Honda World Tour
Rider no. 70 on the 2011 SOHC/4 Honda World Tour

my '75 CB750 cafe build photo documentary:  looking for the Lone Stars is like playing Where's Waldo -- enjoy.
http://www.flickr.com/photos/34828040@N05/sets/72157615892537535/

CB350 twin, rigid meat grinder:
http://www.flickr.com/photos/34828040@N05/sets/72157627005176764/

Blip Workshop
http://www.blipworkshop.com
http://www.facebook.com/blipworkshop

Offline Michael Wilson

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Re: 1975 CB750 K5 cafe build - first bike, first build - almost there!
« Reply #194 on: March 03, 2011, 04:29:12 PM »
Hope the project is going well. You're posts really got my brain working and I check this thread regularly when I am stuck on a problem with my build.

God luck getting it back up and running.

PS I am currently recovering from wrist surgery. There is nothing like wrenching for rehab!
Tear it down.

Offline Old75_ratafe

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Re: 1975 CB750 K5 cafe build - first bike, first build - almost there!
« Reply #195 on: March 03, 2011, 10:02:15 PM »
Just read what happened.  D00d, how are you doing?

Hey, buddy -- thanks for asking!  I'm doing pretty good.  The ol' wrist doesn't have the same strengh as before or the same range of motion, but I still think it improves everytime I hit the workshop for some moto physical thereapy  ;D  Maybe a byproduct of my downtime has been too much thinking and searching out new projects.  I seem to acquired (4) CB and CL350's  ::)

Funny how that works huh... I've been sitting here all winter thinking of what to do next and was gonna help a buddy pick up a 650.... Now looks like that plus two late 70's goldwings and another 750.  My one car garage is about to become pretty crowded.
1975 CB750K
Project Back in Black

Sent from my Texas Instruments TI99/4A Computer

Offline Really?

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Re: 1975 CB750 K5 cafe build - first bike, first build - almost there!
« Reply #196 on: March 04, 2011, 08:48:49 AM »
Just read what happened.  D00d, how are you doing?

Hey, buddy -- thanks for asking!  I'm doing pretty good.  The ol' wrist doesn't have the same strengh as before or the same range of motion, but I still think it improves everytime I hit the workshop for some moto physical thereapy  ;D  Maybe a byproduct of my downtime has been too much thinking and searching out new projects.  I seem to acquired (4) CB and CL350's  ::)

Geez, you get hurt and then develop a sickness!

Really, glad to hear that you are doing good and that what you are dealing with is at a minimum.
I don't have a motorcycle, sold it ('85 Yamaha Venture Royale).  Haven't had a CB750 for over 40 years.

The Wife's Bike - 750K5
The Kid's Bike - 750K3

Offline Free Booter

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Re: 1975 CB750 K5 cafe build - first bike, first build - almost there!
« Reply #197 on: March 05, 2011, 08:26:30 AM »
I might be interested in a couple of those oil tanks sir.

Offline the architect

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Re: 1975 CB750 K5 cafe build - first bike, first build - almost there!
« Reply #198 on: March 07, 2011, 09:17:48 AM »
I might be interested in a couple of those oil tanks sir.

Good to know!  If and when I get some fabbed up, I'll post 'em up here for the taking.  I'd like to so a few as a trial run to see if I can get this idea to work just the way I'd like. 

Does anyone in Houston have a CB750 with all the stock brackets and widgets still attached?  I could use a good look at that to know where I'd have to negotiate around existing "stuff".  ;D
Rider no. 83 on the 2013 SOHC/4 Honda World Tour
Rider no. 228 on the 2012 SOHC/4 Honda World Tour
Rider no. 70 on the 2011 SOHC/4 Honda World Tour

my '75 CB750 cafe build photo documentary:  looking for the Lone Stars is like playing Where's Waldo -- enjoy.
http://www.flickr.com/photos/34828040@N05/sets/72157615892537535/

CB350 twin, rigid meat grinder:
http://www.flickr.com/photos/34828040@N05/sets/72157627005176764/

Blip Workshop
http://www.blipworkshop.com
http://www.facebook.com/blipworkshop

Offline Free Booter

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« Reply #199 on: March 09, 2011, 10:43:14 AM »
Just nominated your 750 for Bike of the Month so hurrry up and get it rolling again.