Author Topic: 1973 CB500 Restore, 1243 orig miles, So.Cal backyard find  (Read 15491 times)

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Offline rtbmrgl

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Re: 1973 CB500 Restore, 1243 orig miles, So.Cal backyard find
« Reply #25 on: April 06, 2014, 05:02:18 PM »
If leak is tolerable, I say keep riding
Thanks Goldarrow for your words of wisdom, went for a 120 mile today and no oil leak.
The gasket swelled up, hopefully doesn't start up with the short trips back and forth to work.
It was 78deg today, spring is here.
thanks, Mark
Roseville, Ca

Got Points!

1973 CB500 back yard find 1243 orig mi,  http://forums.sohc4.net/index.php?topic=124285.0
1976 CB750 Restoring,        http://forums.sohc4.net/index.php?topic=132997

Offline Stev-o

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Re: 1973 CB500 Restore, 1243 orig miles, So.Cal backyard find
« Reply #26 on: April 12, 2014, 04:29:34 AM »
I have the same minor leak on my '76 550.  Not pulling it apart for that.
'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Offline rtbmrgl

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Re: 1973 CB500 Restore, 1243 orig miles, So.Cal backyard find
« Reply #27 on: April 12, 2014, 05:31:58 PM »
The oil leak seems to have stopped, I really don't want to take the head off, hopefully it will make it through the summer and fall. Ill need a project for next winter.
CJMC show and swap meet in Auburn is coming up in a few months. They have an evening ride and I'll probably enter the show also, I have no intention on winning I just like to see all the bikes no matter what shape there in.
thanks, Mark
Roseville, Ca

Got Points!

1973 CB500 back yard find 1243 orig mi,  http://forums.sohc4.net/index.php?topic=124285.0
1976 CB750 Restoring,        http://forums.sohc4.net/index.php?topic=132997

Offline rtbmrgl

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Re: 1973 CB500 Restore, 1243 orig miles, So.Cal backyard find
« Reply #28 on: April 24, 2014, 04:07:33 PM »
Got these with my bike, also posting high-res wire diagrams





thanks, Mark
Roseville, Ca

Got Points!

1973 CB500 back yard find 1243 orig mi,  http://forums.sohc4.net/index.php?topic=124285.0
1976 CB750 Restoring,        http://forums.sohc4.net/index.php?topic=132997

Offline Stev-o

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Re: 1973 CB500 Restore, 1243 orig miles, So.Cal backyard find
« Reply #29 on: April 27, 2014, 05:25:17 PM »
How's it running?   I just bought a '71 CB500 that I will restore
'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Offline rtbmrgl

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Re: 1973 CB500 Restore, 1243 orig miles, So.Cal backyard find
« Reply #30 on: April 27, 2014, 07:19:47 PM »

How's it running?   I just bought a '71 CB500 that I will restore
Runs perfect. Oil leak at head gasket as gone away. Need to get seat redone, foam sucks. Found at one time guy sell seat foam but haven't been able to find it.


Sent from my iPhone using Tapatalk
thanks, Mark
Roseville, Ca

Got Points!

1973 CB500 back yard find 1243 orig mi,  http://forums.sohc4.net/index.php?topic=124285.0
1976 CB750 Restoring,        http://forums.sohc4.net/index.php?topic=132997

Offline rtbmrgl

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Re: 1973 CB500 Restore, 1243 orig miles, So.Cal backyard find
« Reply #31 on: March 01, 2018, 09:36:22 AM »
Got a set of carbs off ebay.  Mine were very corroded where the main jet slides in, almost to the point of not sealing. The carbs from eBay were in excellent condition, even the slow jets weren't plugged. Rebuilt and ready to install, DAVE500 gave my a good tips Im going to try, soldered the air screws. This to make it a little more rich at idle, should start easier, its really cold blooded. Im also boring to 1st over, compression was low , water had gotten into the cylinder. Ive been running it, just never did anything about it.

My elderly in-laws are living with us for awhile >:(, so started garage projects.  :)

Im installing Delkevic. headers, hopefully this set up will workgood

My jet setup.

needle 4th posistion
105 main
42 slow jet
soldered air screw holes



thanks, Mark
Roseville, Ca

Got Points!

1973 CB500 back yard find 1243 orig mi,  http://forums.sohc4.net/index.php?topic=124285.0
1976 CB750 Restoring,        http://forums.sohc4.net/index.php?topic=132997

Offline rtbmrgl

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Re: 1973 CB500 Restore, 1243 orig miles, So.Cal backyard find
« Reply #32 on: March 10, 2018, 08:25:36 AM »
Just got this running, I restored it 5yrs ago but I never put in new pistons, just re-rung it. Only had 1243 orig mi, a little moisture had gotten onto the cylinders. Bike just wasn't running so good, I did realize how under powered it was until i got the bike running with new 1st over bore, I also fattened the fuel mixture, new coils and a brand new set of Delkevic headers. It has never ran as good as it is now.


thanks, Mark
Roseville, Ca

Got Points!

1973 CB500 back yard find 1243 orig mi,  http://forums.sohc4.net/index.php?topic=124285.0
1976 CB750 Restoring,        http://forums.sohc4.net/index.php?topic=132997

Offline Stev-o

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Re: 1973 CB500 Restore, 1243 orig miles, So.Cal backyard find
« Reply #33 on: March 10, 2018, 08:42:19 AM »
   I just bought a '71 CB500 that I will restore

Blast from the past!  I dont have that ^^^ CB500 anymore but I just bought another that I will be getting back on the road!

I'll need exhaust, what are your thoughts on the Delkavic?

BTW - I'm nominating you for BOTM....
'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Offline rtbmrgl

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Re: 1973 CB500 Restore, 1243 orig miles, So.Cal backyard find
« Reply #34 on: March 10, 2018, 05:14:58 PM »
well thanks Stev-o for nominating me, maybe third time is a charm. Always stiff competition.
Delkavic is top notch, fit perfect, sounds great and and nice craftsmanship. I need some pizzazz, the bike was sitting a lot while i rode my Norton, I had guilt.
I saw your post from 2014.
thanks, Mark
Roseville, Ca

Got Points!

1973 CB500 back yard find 1243 orig mi,  http://forums.sohc4.net/index.php?topic=124285.0
1976 CB750 Restoring,        http://forums.sohc4.net/index.php?topic=132997

Offline SOHC4 Cafe Racer Fan

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Re: 1973 CB500 Restore, 1243 orig miles, So.Cal backyard find
« Reply #35 on: March 12, 2018, 08:11:04 AM »
Where in SoCal did you find your bike?
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 rtbmrgl

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Re: 1973 CB500 Restore, 1243 orig miles, So.Cal backyard find
« Reply #36 on: March 12, 2018, 08:32:46 AM »
Where in SoCal did you find your bike?

I was stored in the backyard in Cerritos.
thanks, Mark
Roseville, Ca

Got Points!

1973 CB500 back yard find 1243 orig mi,  http://forums.sohc4.net/index.php?topic=124285.0
1976 CB750 Restoring,        http://forums.sohc4.net/index.php?topic=132997