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Author Topic: 1974 CB550. Racetech Monoshock. JMR Head. Built Engine. "BLAC"  (Read 183082 times)

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Offline BLAC

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Re: 1974 Honda CB550. Monoshock. "BLAC"
« Reply #450 on: January 15, 2017, 06:27:33 pm »
I have only ever ridden the bike once, and I don't recall any issues shifting... :-\

I will snap a few more close ups when I am back at my shop.
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If you can't fix it with a hammer, it's an electrical problem... If it's an electrical problem, it's Cal's problem.

*2005 Yamaha R6 (sold)
*2014 Ducati Streetfighter 848 (sold)
*2014 BMW S1000RR (sold)
*2010 Ducati Streetfighter S
*1978 CB550 Restomod Build
*1974 CB550 Monoshock build
http://forums.sohc4.net/index.php/topic,154614.0.html

Offline BLAC

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Re: 1974 Honda CB550. Monoshock. "BLAC"
« Reply #451 on: January 16, 2017, 03:11:31 am »
Going through old pics and I found a photo of me taken the first time I sat on a motorcycle, and it was a Honda  ;)

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If you can't fix it with a hammer, it's an electrical problem... If it's an electrical problem, it's Cal's problem.

*2005 Yamaha R6 (sold)
*2014 Ducati Streetfighter 848 (sold)
*2014 BMW S1000RR (sold)
*2010 Ducati Streetfighter S
*1978 CB550 Restomod Build
*1974 CB550 Monoshock build
http://forums.sohc4.net/index.php/topic,154614.0.html

Offline calj737

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Re: 1974 Honda CB550. Monoshock. "BLAC"
« Reply #452 on: January 16, 2017, 05:01:47 am »
And what a Honda that was! An omen for the future no doubt  :D
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"Of all tyrannies, a tyranny sincerely exercised for the good of it's victim may be the most oppressive. It may be better to live under robber barons than under omnipotent moral busybodies. The robber baron's cruelty may sometimes sleep, his cupidity may at some point be satiated, but those who torment us for our own good will torment us without end for they do so with the approval of their own conscience." - C.S. Lewis

Offline SOHC4 Cafe Racer Fan

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Re: 1974 Honda CB550. Monoshock. "BLAC"
« Reply #453 on: January 16, 2017, 09:11:43 am »
Start 'em off young!  VFR!
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Offline 754

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Re: 1974 Honda CB550. Monoshock. "BLAC"
« Reply #454 on: January 16, 2017, 02:06:58 pm »
Jeez I thought I was old when that bike came out...
Now I really feel old..sniff...sniff...
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Maker of the WELDLESS 750 Frame Kit
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Kelowna B.C.       Canada

My next bike will be a ..ANFOB.....

It's All part of the ADVENTURE...

73 836cc.. Green, had it for 3 decades!!
Lost quite a few CB 750's along the way

Offline seanbarney41

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Re: 1974 Honda CB550. Monoshock. "BLAC"
« Reply #455 on: January 16, 2017, 02:15:50 pm »
Quote from: BLAC on January 16, 2017, 03:11:31 am
Going through old pics and I found a photo of me taken the first time I sat on a motorcycle, and it was a Honda  ;)


dohhh!...that makes me sad and happy at the same time.  It was an awesome bike before it munched a valve and a piston last summer.  I miss it.DSCN0731 by Sean Barney, on Flickr
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Offline BLAC

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Re: 1974 Honda CB550. Monoshock. "BLAC"
« Reply #456 on: January 16, 2017, 02:55:08 pm »
wow that's the one! Sorry for your loss  :'(
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If you can't fix it with a hammer, it's an electrical problem... If it's an electrical problem, it's Cal's problem.

*2005 Yamaha R6 (sold)
*2014 Ducati Streetfighter 848 (sold)
*2014 BMW S1000RR (sold)
*2010 Ducati Streetfighter S
*1978 CB550 Restomod Build
*1974 CB550 Monoshock build
http://forums.sohc4.net/index.php/topic,154614.0.html

Offline BLAC

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Re: 1974 Honda CB550. Monoshock. "BLAC"
« Reply #457 on: January 16, 2017, 05:13:43 pm »
Quote from: 754 on January 16, 2017, 02:06:58 pm
Jeez I thought I was old when that bike came out...
Now I really feel old..sniff...sniff...

well you are a "really old timer"   :P
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If you can't fix it with a hammer, it's an electrical problem... If it's an electrical problem, it's Cal's problem.

*2005 Yamaha R6 (sold)
*2014 Ducati Streetfighter 848 (sold)
*2014 BMW S1000RR (sold)
*2010 Ducati Streetfighter S
*1978 CB550 Restomod Build
*1974 CB550 Monoshock build
http://forums.sohc4.net/index.php/topic,154614.0.html

Offline BLAC

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Re: 1974 Honda CB550. Monoshock. "BLAC"
« Reply #458 on: January 17, 2017, 12:54:20 pm »
Back to the bike:

Is this plate substantial enough for me to use (with tabs on the underside) as the anchor point under the front of the seat for my monoshock?

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If you can't fix it with a hammer, it's an electrical problem... If it's an electrical problem, it's Cal's problem.

*2005 Yamaha R6 (sold)
*2014 Ducati Streetfighter 848 (sold)
*2014 BMW S1000RR (sold)
*2010 Ducati Streetfighter S
*1978 CB550 Restomod Build
*1974 CB550 Monoshock build
http://forums.sohc4.net/index.php/topic,154614.0.html

Offline calj737

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Re: 1974 Honda CB550. Monoshock. "BLAC"
« Reply #459 on: January 17, 2017, 01:27:04 pm »
More than enough.
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"Of all tyrannies, a tyranny sincerely exercised for the good of it's victim may be the most oppressive. It may be better to live under robber barons than under omnipotent moral busybodies. The robber baron's cruelty may sometimes sleep, his cupidity may at some point be satiated, but those who torment us for our own good will torment us without end for they do so with the approval of their own conscience." - C.S. Lewis

Offline BLAC

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Re: 1974 Honda CB550. Monoshock. "BLAC"
« Reply #460 on: January 17, 2017, 01:34:34 pm »
Thats what I thought, but I have reoccurring nightmares of riding down the 405 when one of the monoshock mounts lets go..

t'would ruin ones day.
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If you can't fix it with a hammer, it's an electrical problem... If it's an electrical problem, it's Cal's problem.

*2005 Yamaha R6 (sold)
*2014 Ducati Streetfighter 848 (sold)
*2014 BMW S1000RR (sold)
*2010 Ducati Streetfighter S
*1978 CB550 Restomod Build
*1974 CB550 Monoshock build
http://forums.sohc4.net/index.php/topic,154614.0.html

Offline calj737

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Re: 1974 Honda CB550. Monoshock. "BLAC"
« Reply #461 on: January 17, 2017, 01:36:47 pm »
Wait! MoMo shock mount? I read that as a seat mount. Oops.

What's the dimensions of that? And how will you attach it?
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'74 550 Build http://forums.sohc4.net/index.php?topic=126401.0
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"Of all tyrannies, a tyranny sincerely exercised for the good of it's victim may be the most oppressive. It may be better to live under robber barons than under omnipotent moral busybodies. The robber baron's cruelty may sometimes sleep, his cupidity may at some point be satiated, but those who torment us for our own good will torment us without end for they do so with the approval of their own conscience." - C.S. Lewis

Offline 754

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Re: 1974 Honda CB550. Monoshock. "BLAC"
« Reply #462 on: January 17, 2017, 03:27:01 pm »
If it spans the width of the seat rails, i think it could use a doubler..anotr plate or maybe some 1 or 1 1/4  channel across the top.
« Last Edit: January 17, 2017, 06:08:55 pm by 754 »
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Maker of the WELDLESS 750 Frame Kit
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Kelowna B.C.       Canada

My next bike will be a ..ANFOB.....

It's All part of the ADVENTURE...

73 836cc.. Green, had it for 3 decades!!
Lost quite a few CB 750's along the way

Offline BLAC

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Re: 1974 Honda CB550. Monoshock. "BLAC"
« Reply #463 on: January 17, 2017, 03:57:49 pm »
It is the same shape and size as the tank mounting plate that attaches to the rubber mount, the half moon plate.

I am thinking about boxing it off to add strength as well

Better pics to come...

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If you can't fix it with a hammer, it's an electrical problem... If it's an electrical problem, it's Cal's problem.

*2005 Yamaha R6 (sold)
*2014 Ducati Streetfighter 848 (sold)
*2014 BMW S1000RR (sold)
*2010 Ducati Streetfighter S
*1978 CB550 Restomod Build
*1974 CB550 Monoshock build
http://forums.sohc4.net/index.php/topic,154614.0.html

Offline NobleHops

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Re: 1974 Honda CB550. Monoshock. "BLAC"
« Reply #464 on: January 17, 2017, 04:42:22 pm »
Bryan, a TON of force is fed into the shock mounts, especially at the end of a lever in a monoshock position. Err on the side of beefy. 
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Nils Menten * Tucson, Arizona, USA

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My build thread: NobleHops makes a 400F pretty for his wife: http://forums.sohc4.net/index.php?topic=131210.0

Offline 540nova

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Re: 1974 Honda CB550. Monoshock. "BLAC"
« Reply #465 on: January 17, 2017, 05:35:10 pm »
I would add gussets to it.


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Offline Restoration Fan

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Re: 1974 Honda CB550. Monoshock. "BLAC"
« Reply #466 on: January 17, 2017, 05:39:15 pm »
Quote from: 540nova on January 17, 2017, 05:35:10 pm
I would add gussets to it.
 
I would double the thickness of the metal, weld it to the frame and then weld 2 small gussets on each side. 
Considering that monoshock will be sitting beneath your seat, the last thing in the world you want is for the metal to break and the shock to get inserted some place in your rectum...right before you wreck and go down.
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Offline 754

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Re: 1974 Honda CB550. Monoshock. "BLAC"
« Reply #467 on: January 17, 2017, 06:10:21 pm »
Fiixed my last post.. The small channel atop what you have may do the trick..
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Maker of the WELDLESS 750 Frame Kit
dodogas99@gmail.com
Kelowna B.C.       Canada

My next bike will be a ..ANFOB.....

It's All part of the ADVENTURE...

73 836cc.. Green, had it for 3 decades!!
Lost quite a few CB 750's along the way

Offline bill440cars

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Re: 1974 Honda CB550. Monoshock. "BLAC"
« Reply #468 on: January 17, 2017, 06:19:46 pm »



        Whoa, I kinda got a tad behind on this, and looks like progress is still going pretty well. You do some mighty fine work and put slot of thought into a build and it shows. Gotta love the tips and suggestions, from folks here, as it has been said, lots of Valuable info on this forum, from lots of folks who don't mind offering it.  ;)
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Offline calj737

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Re: 1974 Honda CB550. Monoshock. "BLAC"
« Reply #469 on: January 17, 2017, 06:27:20 pm »
The shock should be mounted to brackets which in turn are welded to the plate. The brackets should be 3/16" and thus the plate should be as well. As for strength, 3/16" plate on edge is a LOT stronger than you realize. The brackets apply the force against the plate, which will be welded to the underside of the seat rails (if I understand you correctly?) As long as the plate and brackets are properly welded, I think you'll be safe.

If the plate and brackets are 1/8" you're probably on the borderline of strong enough. And a lot of really depends on how the shock is designed and mounted. Some act as dampers on pivot arms, some are direct to frame. But the shock itself takes up a lot of the force that would be otherwise transferred to the frame. This is not an inducement to short cut safety, just an explanation.

I'd defer to whomever is building your monoshock for their guidance as a final judgement.
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"Of all tyrannies, a tyranny sincerely exercised for the good of it's victim may be the most oppressive. It may be better to live under robber barons than under omnipotent moral busybodies. The robber baron's cruelty may sometimes sleep, his cupidity may at some point be satiated, but those who torment us for our own good will torment us without end for they do so with the approval of their own conscience." - C.S. Lewis

Offline 754

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Re: 1974 Honda CB550. Monoshock. "BLAC"
« Reply #470 on: January 17, 2017, 07:28:38 pm »
I was thinking late is horizontal , which way is it going?
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Maker of the WELDLESS 750 Frame Kit
dodogas99@gmail.com
Kelowna B.C.       Canada

My next bike will be a ..ANFOB.....

It's All part of the ADVENTURE...

73 836cc.. Green, had it for 3 decades!!
Lost quite a few CB 750's along the way

Offline BLAC

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Re: 1974 Honda CB550. Monoshock. "BLAC"
« Reply #471 on: January 18, 2017, 12:24:51 am »
Yep it will be horizontal with the two brackets under it to hold the spring. (this is the cardboard template)

« Last Edit: January 18, 2017, 12:32:34 am by BLAC »
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If you can't fix it with a hammer, it's an electrical problem... If it's an electrical problem, it's Cal's problem.

*2005 Yamaha R6 (sold)
*2014 Ducati Streetfighter 848 (sold)
*2014 BMW S1000RR (sold)
*2010 Ducati Streetfighter S
*1978 CB550 Restomod Build
*1974 CB550 Monoshock build
http://forums.sohc4.net/index.php/topic,154614.0.html

Offline BLAC

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Re: 1974 Honda CB550. Monoshock. "BLAC"
« Reply #472 on: January 19, 2017, 10:52:18 pm »
Lets crack this thing open!



Rockers look pretty good!


Head action in the shop


Thoughts on this cam chain tensioner?


I found something harder than diamonds.. this old gasket..   >:(


Lets see whats in here..
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If you can't fix it with a hammer, it's an electrical problem... If it's an electrical problem, it's Cal's problem.

*2005 Yamaha R6 (sold)
*2014 Ducati Streetfighter 848 (sold)
*2014 BMW S1000RR (sold)
*2010 Ducati Streetfighter S
*1978 CB550 Restomod Build
*1974 CB550 Monoshock build
http://forums.sohc4.net/index.php/topic,154614.0.html

Offline BLAC

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Re: 1974 Honda CB550. Monoshock. "BLAC"
« Reply #473 on: January 19, 2017, 10:56:55 pm »
Allow me to be the 1,294th person to say it.... Nils is the man and vapor blasting is amazing...



Are you kidding me, this is amazing...


This might be the straw that broke the camels wallet.. I might have to split my case and send it off to get beautified
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If you can't fix it with a hammer, it's an electrical problem... If it's an electrical problem, it's Cal's problem.

*2005 Yamaha R6 (sold)
*2014 Ducati Streetfighter 848 (sold)
*2014 BMW S1000RR (sold)
*2010 Ducati Streetfighter S
*1978 CB550 Restomod Build
*1974 CB550 Monoshock build
http://forums.sohc4.net/index.php/topic,154614.0.html

Offline calj737

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Re: 1974 Honda CB550. Monoshock. "BLAC"
« Reply #474 on: January 20, 2017, 03:51:55 am »
Quote from: BLAC on January 19, 2017, 10:56:55 pm
This might be the straw that broke the camels wallet.. I might have to split my case and send it off to get beautified
About time you came to our senses!  ;D
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'73 500 Build http://forums.sohc4.net/index.php?topic=132935.0

"Of all tyrannies, a tyranny sincerely exercised for the good of it's victim may be the most oppressive. It may be better to live under robber barons than under omnipotent moral busybodies. The robber baron's cruelty may sometimes sleep, his cupidity may at some point be satiated, but those who torment us for our own good will torment us without end for they do so with the approval of their own conscience." - C.S. Lewis
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