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Author Topic: 1974 CB550. Racetech Monoshock. JMR Head. Built Engine. "BLAC"  (Read 183467 times)

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Offline joeyvans

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Re: 1974 Honda CB550 Build. "BlacSOHC"
« Reply #275 on: June 20, 2016, 02:41:24 PM »
Which length Hagons did you get?


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1976 CB550 K2
Non-SOHC4 - 1974 CB450 K7
Non-SOHC4 - 1996 VFR750F

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Offline BLAC

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Re: 1974 Honda CB550 Build. "BlacSOHC"
« Reply #276 on: June 20, 2016, 03:39:52 PM »
Quote from: joeyvans on June 20, 2016, 02:41:24 PM
Which length Hagons did you get?


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I'm not sure off the top of my head.  I called Hagon and told them it was for a CB550 and gave them my weight (180 lbs) and they sent me springs.  I will measure when I get home, but they should be stock length.  The reason they might be a little short in my case is because I moved the mounting position forward.


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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 joeyvans

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Re: 1974 Honda CB550 Build. "BlacSOHC"
« Reply #277 on: June 20, 2016, 03:46:30 PM »
It does look like a somewhat serious angle, even without any compression. It looks awesome though.... Hope it works!


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1976 CB550 K2
Non-SOHC4 - 1974 CB450 K7
Non-SOHC4 - 1996 VFR750F

"No matter how much you shake and dance... the last three drops go in your pants."

Offline BLAC

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Re: 1974 Honda CB550 Build. "BlacSOHC"
« Reply #278 on: June 20, 2016, 04:47:23 PM »
Quote from: joeyvans on June 20, 2016, 03:46:30 PM
It does look like a somewhat serious angle, even without any compression. It looks awesome though.... Hope it works!


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Thanks! ya I think it is coming together nicely!  I have measured everything 100 times all of the mounting points and angles are all even!  It's a good feeing  ;D
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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 SOHC4 Cafe Racer Fan

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Re: 1974 Honda CB550 Build. "BlacSOHC"
« Reply #279 on: June 20, 2016, 05:04:39 PM »
Let's keep fingers crossed for clearance, since the subframe looks tidy.  How did you join your upper rails to the existing frame?
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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 BLAC

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Re: 1974 Honda CB550 Build. "BlacSOHC"
« Reply #280 on: June 20, 2016, 06:17:55 PM »
Quote from: CB750 Cafe Racer Fan on June 20, 2016, 05:04:39 PM
Let's keep fingers crossed for clearance, since the subframe looks tidy.  How did you join your upper rails to the existing frame?

I filed down some chromoly tubing to be a press fit into the stock frame and the loop bar.  It took a while but it fits PERFECT.  I had to tap the loop on with a rubber mallet.  I drilled a hole and spot welded it on each side so it should be very strong.

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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 SOHC4 Cafe Racer Fan

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Re: 1974 Honda CB550 Build. "BlacSOHC"
« Reply #281 on: June 20, 2016, 07:47:07 PM »
Cool.
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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 BLAC

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Re: 1974 Honda CB550 Build. "BlacSOHC"
« Reply #282 on: June 23, 2016, 03:17:36 PM »
To measure clearance while it is still tacked up (not fully welded) would you suggest I leave the top of the springs disconnected and move the swingarm with the wheel as close to full range of the spring to make sure it doesnt hit? 

I just dont want to bolt it all together and start jumping on it and potentially bend or break the tacks. 

does that make sense?  It doesnt feel very scientific, but I think I could eye ball the travel pretty close...
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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 Denver_Larry

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Re: 1974 Honda CB550 Build. "BlacSOHC"
« Reply #283 on: June 23, 2016, 04:59:31 PM »
Certainly, I would figure out what the compressed length of the shock is (center of mounting hole to center of mounting hole) and mock it all up with the wheel and tire if you are worried about clearance.  get everything assembled and use a tiedown or something to hold the wheel up while you match and confirm the distance between the upper and lower mounts.
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2005 RC51
1973 CB350F...project

Offline riverfever

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Re: 1974 Honda CB550 Build. "BlacSOHC"
« Reply #284 on: June 24, 2016, 09:26:43 AM »
That looks wonderful. For some reason my eye is always really critical of the line from seat to tank. You've really taken your time and thought things through. It shows.
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"You wouldn't think that out here...a man could simply run clear...out of country but oh my...oh my...nothing but the light." -Ben Nichols

Offline BLAC

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Re: 1974 Honda CB550 Build. "BlacSOHC"
« Reply #285 on: June 24, 2016, 10:10:37 AM »
Quote from: riverfever on June 24, 2016, 09:26:43 AM
That looks wonderful. For some reason my eye is always really critical of the line from seat to tank. You've really taken your time and thought things through. It shows.

Thank you I appreciate that!  I am like you and hate it when that joining area looks wonky or when the "cafe racer seat" that someone buys and screws onto the stock frame looks like it is sitting on top of the bike instead of being a part of it.

This is the first bike I have ever built, so I really am taking my time to make sure I get it how I want AND to make sure I dont make too many stupid mistakes
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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 SOHC4 Cafe Racer Fan

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Re: 1974 Honda CB550 Build. "BlacSOHC"
« Reply #286 on: June 24, 2016, 10:22:45 AM »
Quote from: riverfever on June 24, 2016, 09:26:43 AM
That looks wonderful. For some reason my eye is always really critical of the line from seat to tank. You've really taken your time and thought things through. It shows.

Someone hasn't adjusted to Hawaiian time (6:26 am). 
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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 BLAC

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Re: 1974 Honda CB550 Build. "BlacSOHC"
« Reply #287 on: June 24, 2016, 06:21:41 PM »
Gotta keep your nuts clean!  ;D just got these new fork end caps from Honda!

devil is in the details.

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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 Camrector

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Re: 1974 Honda CB550 Build. "BlacSOHC"
« Reply #288 on: June 24, 2016, 08:21:16 PM »
Wow how's that for vanity!! Selfie fork end caps!
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Offline BLAC

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Re: 1974 Honda CB550 Build. "BlacSOHC"
« Reply #289 on: June 24, 2016, 09:29:16 PM »
Quote from: Camrector on June 24, 2016, 08:21:16 PM
Wow how's that for vanity!! Selfie fork end caps!

So I can stare at myself while I'm riding!!! :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 Build. "BlacSOHC"
« Reply #290 on: June 25, 2016, 12:54:22 AM »
Low...rye...duh...




I did some measuring and my Hagon shocks are going to be too short with this subframe, but it looks like they have some that are perfect... Now I just have to hope they might exchange them  ::)  :-X
« Last Edit: June 25, 2016, 12:56:00 AM by blacSOHC »
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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 riverfever

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Re: 1974 Honda CB550 Build. "BlacSOHC"
« Reply #291 on: June 25, 2016, 01:54:11 AM »
Quote from: CB750 Cafe Racer Fan on June 24, 2016, 10:22:45 AM
Quote from: riverfever on June 24, 2016, 09:26:43 AM
That looks wonderful. For some reason my eye is always really critical of the line from seat to tank. You've really taken your time and thought things through. It shows.

Someone hasn't adjusted to Hawaiian time (6:26 am).

It's killing me dude. I'm up super early drinking coffee and plotting where I'll cast my line. Tonight I'm up late trying to unwind from the long day with the vintage Porsche. I got good stories.
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"You wouldn't think that out here...a man could simply run clear...out of country but oh my...oh my...nothing but the light." -Ben Nichols

Offline redwillis1978

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Re: 1974 Honda CB550 Build. "BlacSOHC"
« Reply #292 on: June 25, 2016, 06:13:59 AM »
Quote from: blacSOHC on June 25, 2016, 12:54:22 AM
Low...rye...duh...




I did some measuring and my Hagon shocks are going to be too short with this subframe, but it looks like they have some that are perfect... Now I just have to hope they might exchange them  ::)  :-X
Time to purchase some 17-inch wheels dude.
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Offline BLAC

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Re: 1974 Honda CB550 Build. "BlacSOHC"
« Reply #293 on: June 25, 2016, 12:36:20 PM »
Quote from: redwillis1978 on June 25, 2016, 06:13:59 AM
Quote from: blacSOHC on June 25, 2016, 12:54:22 AM
Low...rye...duh...




I did some measuring and my Hagon shocks are going to be too short with this subframe, but it looks like they have some that are perfect... Now I just have to hope they might exchange them  ::)  :-X
Time to purchase some 17-inch wheels dude.


i want to run 18's and just buying the correct length springs would also be infinitely cheaper than having buchanans make another wheel for me (and buying a tire)

In this photo I am just measuring out the point where the rear tire will bottom out.  It happened when the mounts are 10.25" apart (center of eye to eye)
« Last Edit: June 25, 2016, 01:41:16 PM by blacSOHC »
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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

Online calj737

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Re: 1974 Honda CB550 Build. "BlacSOHC"
« Reply #294 on: June 25, 2016, 02:57:41 PM »
That does not reflect a true bottom of shock compression as there is no Rider weight calculated. Worst case, longer shocks are needed.
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'74 550 Build http://forums.sohc4.net/index.php?topic=126401.0
'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

Offline BLAC

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Re: 1974 Honda CB550 Build. "BlacSOHC"
« Reply #295 on: June 25, 2016, 05:44:25 PM »
Quote from: calj737 on June 25, 2016, 02:57:41 PM
That does not reflect a true bottom of shock compression as there is no Rider weight calculated. Worst case, longer shocks are needed.

I'm not sure I understand.  My thinking is that if I can find the fully compressed and "bottomed out" length of the shocks, it won't matter what my weight is as there would be no more room for it to travel anyway.  I see how my weight and the weight of the motor would effect "extended" and static ride height, but not sure how my weight would make the shocks travel farther than the "fully compressed" length.

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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 Camrector

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Re: 1974 Honda CB550 Build. "BlacSOHC"
« Reply #296 on: June 25, 2016, 06:34:26 PM »
Pm sent
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Offline redwillis1978

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Re: 1974 Honda CB550 Build. "BlacSOHC"
« Reply #297 on: June 25, 2016, 06:54:51 PM »
Maybe it's the angle of the photo, but it looks like the swing arm angle at ride height would need to angled way down. By the time you got to this point the chain would have slacked off the sprockets and amputated you left foot.
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Offline BLAC

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Re: 1974 Honda CB550 Build. "BlacSOHC"
« Reply #298 on: June 25, 2016, 07:43:00 PM »
The swing arm at ride height is angled slightly less down than a factory bike. 
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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 redwillis1978

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Re: 1974 Honda CB550 Build. "BlacSOHC"
« Reply #299 on: June 25, 2016, 09:12:54 PM »
Probably just the picture.
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