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Author Topic: 1972 CB500 unnamed build  (Read 1554 times)

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Offline sebastienb

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1972 CB500 unnamed build
« on: January 07, 2014, 11:00:14 PM »
Got my bike of craigslist back in July 2013. The bike had been parked outside under a cover for the past 8-10 years, the owner said he checked her and the engine would need to be replaced because it was stuck. At the time I didn't know much about motorcycle mechanics but I had been on this forum a couple of times just browsing the other builds. At the price he was selling her it was worth trying to restore it.



When I got her home think one of the first thing I did was signup for the forum. After that started the automatic transmission fluid+ Acetone fill ups. After a few weeks with no success I expressed my frustration on the board and you guys encouraged me yo keep trying and a few weeks later I was rocking her gently with no progress then I tried putting her in 2 or 3rd gear (don't remember anymore) and proceeded to life the bike from the rear wheel and after the second try the wheel turned and my entire garage wall and celling was covered in automatic transmission oil. She was free!

 

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Offline ekpent

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Re: 1972 CB500 unnamed build
« Reply #1 on: January 08, 2014, 06:03:02 AM »
Ha Ha looks like you got a good squirt there !!  A happy mess I guess. 
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Offline SOHC4 Cafe Racer Fan

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Re: 1972 CB500 unnamed build
« Reply #2 on: January 08, 2014, 07:56:58 AM »
What do you have in mind for it?
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1975 CB550K1 "Blue" Stockish Restomod (http://forums.sohc4.net/index.php?topic=135005.0)
1975 CB550F1 frame/CB650 engine hybrid "The Hot Mess" (http://forums.sohc4.net/index.php/topic,150220.0.html)
2008 Triumph Thruxton (http://forums.sohc4.net/index.php/topic,190956.0.html)
2014 MV Agusta Brutale Dragster 800
2015 Yamaha FZ-09 (http://forums.sohc4.net/index.php/topic,186861.0.html)

"There are some things nobody needs in this world, and a bright-red, hunch-back, warp-speed 900cc cafe racer is one of them — but I want one anyway, and on some days I actually believe I need one.... Being shot out of a cannon will always be better than being squeezed out of a tube. That is why God made fast motorcycles, Bubba." Hunter S. Thompson, Song of the Sausage Creature, Cycle World, March 1995.  (http://www.latexnet.org/~csmith/sausage.html and https://magazine.cycleworld.com/article/1995/3/1/song-of-the-sausage-creature)

Sold/Emeritus
1973 CB750K2 "Bionic Mongrel" (http://forums.sohc4.net/index.php?topic=132734.0) - Sold
1977 CB750K7 "Nine Lives" Restomod (http://forums.sohc4.net/index.php?topic=50490.0) - Sold
2005 RVT1000RR RC51-SP2 "El Diablo" - Sold
2016+ Triumph Thruxton 1200 R (http://forums.sohc4.net/index.php/topic,170198.0.html) - Sold

Offline sebastienb

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Re: 1972 CB500 unnamed build
« Reply #3 on: January 08, 2014, 06:39:38 PM »
For now I want to restore it and use it to cruise around town and maybe get on the highway with it once in a while (depending on how well I restore her)

I've been sketching a few ideas of what i'de like her to look like and so far these are the 2 contenders.



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Offline sebastienb

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Re: 1972 CB500 unnamed build
« Reply #4 on: January 08, 2014, 06:58:25 PM »
Things i've done so far,

  • Rebuilt the carbs ( clean and replace most of the internal with an ebay restore kit )
  • Changed both condensers and redid the timing ( one of the condensers was out so only had sparks on 2 plugs).
  • Change plugs and plug covers
  • Replacement K&N air filters
  • Replaced oil filter and oil filter cover and bolt. The bolt was not gripping and was stick to the case, I had to use a reciprocal saw to cut the enclosure off.


At this point i'm struggling with fixing the gas tank or buying a new one. I had let it sit for a few days with Apple cider vinegar and that pretty much removed all the rust but left me with a few holes. I recently got the holes welded but that didn't completely seal the tank. I'm going to be using red kote to create a liner so I did a Muriatic acid wash followed by a phosphoric acid wash to etch the metal. if I fix this tank I will need to buy a new petcock and tank cap latch which will run me over $100 for both on ebay.


Carbs before and after also has the round bowl gasket(form ebay kit) that I later replaced with properly shaped ones (also from ebay).

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Offline Randy

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Re: 1972 CB500 unnamed build
« Reply #5 on: January 08, 2014, 07:20:20 PM »
i personally wouldn't fix that tank.. Work on the rest of the bike while looking for a clean tank.. I found one one ebay same color as my old..they come up alot.. also start looking on Craigslist in and around your state... check the motorcycle yards also...
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1973 CB500k, 1972 CB750 (New Arrival), 1978 Vespa P200 (New Arrival)

Offline sebastienb

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Re: 1972 CB500 unnamed build
« Reply #6 on: January 08, 2014, 08:32:59 PM »
I found a 77-78  CB Tank for $50 thats missing the cap, I need to find out if the I can find a universal gas cap for it. Might go see it tomorrow



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Offline sebastienb

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Re: 1972 CB500 unnamed build
« Reply #7 on: January 09, 2014, 03:24:28 PM »
Still trying to fix my current gas tank, I'm currently trying to rebuild the broken gas tank latch. They sell for 49.99 on ebay, lets see if i can save some money there.

Step 1 scan and trace it

http://instagram.com/p/i9jCPYnG9G/embed/

Step 2 model it

http://instagram.com/p/i91_zynG48/embed

Step 3 Print it.

Will be doing that tomorrow. Hope it works.
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Offline sebastienb

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Re: 1972 CB500 unnamed build
« Reply #8 on: January 19, 2014, 09:21:02 AM »
The 3d printed latch worked great on the gas tank, all I need now is a pin, i'm currently using a piece of metal hanger. I used redkote to seal the pinholes left but the welding and stop the rust.





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Offline sammermpc

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Re: 1972 CB500 unnamed build
« Reply #9 on: January 19, 2014, 09:43:55 AM »
Wow. That's brilliant, scanning the piece. I'm working on a model of the starter switch, but I don't have a working one on hand to check against.
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1972 CB500, 1979 CB750F SS (dohc), 1982 Yamaha Maxim XS400

Offline sebastienb

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Re: 1972 CB500 unnamed build
« Reply #10 on: January 19, 2014, 09:45:29 AM »
Maybe I or someone can scan the piece for you and send an image of it. What piece is it ?

Sent from my Nexus 5 using Tapatalk

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Offline sebastienb

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Re: 1972 CB500 unnamed build
« Reply #11 on: March 15, 2014, 05:56:03 AM »


Received some goodies this week from Dime City Cycles and 4into1.com
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