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Old 10-31-2012, 09:09 PM   #91
ValuePack
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Location: Manchester, NH
Oddometer: 24
An early CB500F came up on the local Craigslist this past spring, running and on the road but in need of cosmetics, $500BO.

I was broke and had to pass. Still kills me. I dig the build, and good on ya for getting the missus involved. Think she could talk mine into getting interested? Hahaha

Subscribed, keep up the great work.
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Old 11-01-2012, 05:11 PM   #92
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You're on your own with talking the missus into the garage Value.

Pulled the head and cylinder last night. Pistons are a bit toasted, but those are to be replaced anyway. Cylinders look great though, will mic them and see if a standard size piston kit will work, otherwise will go with a bore and 1st over.





Had a better look at the cam bearing surfaces. The cam itself looks great, as do the bearing surfaces in the valve cover. The bearing surfaces in the head do show some wear though. I took several pictures and this shows it best. You cannot feel it with your fingernail, but definitely some wear/polishing there. What sayeth the pundits, is this head rooted or no?

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Old 11-01-2012, 06:32 PM   #93
ValuePack
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If it were my head, and it isn't(mine is more round and covered in hair), no ridge = polish it up a bit with emery cloth, slap it together, and ride until it won't go no mo.

Just my $.02, I've not much delved into internals. Couldn't hurt to pick up a spare head, but I'm not sure I'd bother.
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Old 11-01-2012, 08:18 PM   #94
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I'd plastigauge the cam bearings to see if they are in spec, if close I'd polish with scotchbrite.
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Old 01-06-2013, 08:34 PM   #95
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Guts

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Old 01-07-2013, 12:02 AM   #96
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cam bearing surface

I took a dissassembled honda engine to the dealer, years ago, to inquire about the same thing... Only in my engine the wear was more severe. The senior mechanic, who knew his stuff, said "Don't worry about it". I pressed him further and he said "I've put together many worse than that and my rebuilds hold up"
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Old 01-07-2013, 09:44 PM   #97
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Thanks Growl, since I posted that pic I've done some more research and talked to some people who had these bikes. The consensus seems to be that I'll grow old, die and be recycled before the wear gets serious enough to worry.
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Old 07-01-2013, 03:51 PM   #98
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Well, things are moving rapidly along, here it is almost 7 months later...

Stripping the head down.



Pulling the valves out.



This is an intake valve. Some carbon on the valve seat area on the valve as well as the head. Doubt this was sealing very well. The exhaust valves are worse, the sealing area on both the valves and valve seats is carboned up.



It's starting to look a lot better now.

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Old 07-01-2013, 08:21 PM   #99
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The fork lowers were cleaned and polished. Upon dissasembly it was discovered that the inner chrome tubes were 1) rusted at the top where the headlight brackets cover them, and 2) most importantly, one of them had the chrome plating scraped off and deep grooves (probably 0.25 mm or so) were in the tube. New inner tubes are in order. Already have new seals, etc. Spring free length measured well within specs.

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Old 02-09-2014, 06:11 PM   #100
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Ok, I've removed the sprocket carriers from the cush drive rubbers in the rear hub on lots of bikes, but this one's got me.... Last night, went to start dissasembly of the rear wheel on this bike (new spokes, good cleaning of the hub, etc), and the sprocket carrier would not come out. Squirted WD40 in there as best I could, tried heating the hub gently, tried hitting the sprocket from the opposite side to drive it out, tried hitting the inside of the carrier from the other side through the 4 openings... the evil thing did finally loosen just a bit but it still will not come out. What am I missing?
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Old 02-09-2014, 07:15 PM   #101
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BFH
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Old 02-09-2014, 08:30 PM   #102
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Quote:
Originally Posted by Skowinski View Post

I like your garage help!
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Old 02-10-2014, 04:57 AM   #103
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Now that I have a '72 cb500 I'm seeing them all over the internet. It doesn't help that I've been looking for build threads either…

Just wanted to throw in AllBallsRacing.com, they also have the tapered roller neck bearings, along with conversions and charts with a shit-ton of bikes listed so you can make your own conversions.

I'm trying to remember the name of the website, but there are companies that make triple trees to use gixxer forks, and hubs to use the gixxer brakes with a spoked rim. Check out some of the 500/550 builds on sohc4.

One last thing, this thread may help with the reassembly, it is very detailed with lots of pics. http://forums.sohc4.net/index.php?topic=86697.0
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Old 02-10-2014, 04:39 PM   #104
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1972 cb500

Here are a few pics of my 1972 CB500:






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Old 02-12-2014, 07:27 AM   #105
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Originally Posted by Tukata View Post
BFH
Already tried that.

Tunahelper - I'm onto the tapered steering head bearings. No way would I reinstall the loose balls... uggh, wrestled with those too many times in the past.

^^^ That's a nicely done 72 rkleen!
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