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Author Topic: Monoshock - Wich donor bike should I use.  (Read 8566 times)

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Offline output

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Monoshock - Wich donor bike should I use.
« on: January 31, 2016, 10:57:52 PM »
Hello Guys!

I am a beginner from Belgium and I have a question about mono shock.
I have read a lot of stories about monoshock conversion but I figure this is not something to do as a beginner.

Could anybody tell me if there are any good donor bikes to start from who already have a mono shock?

Big thanks!
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Offline calj737

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Re: Monoshock - Wich donor bike should I use.
« Reply #1 on: February 01, 2016, 03:40:39 AM »
Are you building a 750 or 550/500 or 400/350? That effects this endeavor greatly.

It is an extremely difficult thing to do (mono shock conversion) correctly. This is far from a bolt-on conversion or of a plug-and-play. The donor bikes that use mono shocks have swing arms, subframes and main frames all designed for this structure. Our bikes do not. Not only will you need to do a great deal of welding in new structure, but likely machining of the donor swing arm and some decent calculations on the damping rates of the shock. Else, you'll be riding a stiff-arsed horse.

Are you planning to convert your bike to a solo rider seating, or maintaining 2-up riding? Lots of questions to answer before decent advice is sound. Is there a build of a bike you've seen that you're planning to copy?
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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 output

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Re: Monoshock - Wich donor bike should I use.
« Reply #2 on: February 01, 2016, 04:39:00 AM »
Hi!

I am not looking for a conversion.
As you just noted, and I've read it everywhere, a mono shock conversion is a logo for a beginner.

So I am looking for a Honda bike with already has monoshock from factory and modify this bike without any risks of
The only one I know of at the moment is the Honda GL500.

the problem here is that I live in Belgium.
Old Honda's (except for CB's) are rare to find here.

So I would like to broaden my options with some other models that come standard with the mono shock.

I am planning to make a bike with a priority solo seat and I would like to manufacture a double seat for the occasional duo ride.

i would like to build something like this: (but I know this one has a conversion to monoshock, I would use a bike with already has monoshock)
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Offline calj737

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Re: Monoshock - Wich donor bike should I use.
« Reply #3 on: February 01, 2016, 05:45:24 AM »
And what Model of bike are you building?
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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 output

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Re: Monoshock - Wich donor bike should I use.
« Reply #4 on: February 01, 2016, 10:45:53 AM »
The best case would be a 550 monoshock.

« Last Edit: February 01, 2016, 10:50:00 AM by output »
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Offline 70CB750

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Re: Monoshock - Wich donor bike should I use.
« Reply #5 on: February 01, 2016, 10:56:23 AM »
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Offline output

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Re: Monoshock - Wich donor bike should I use.
« Reply #6 on: February 01, 2016, 01:54:20 PM »
Thanks but isn't there any other model?
This hawk is to new, watercooled also..

Other ideas?

Thanks anyway!
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Offline Retro Rocket

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Re: Monoshock - Wich donor bike should I use.
« Reply #7 on: February 01, 2016, 03:18:10 PM »
Quote from: output on February 01, 2016, 04:39:00 AM
Hi!

I am not looking for a conversion.
As you just noted, and I've read it everywhere, a mono shock conversion is a logo for a beginner.

So I am looking for a Honda bike with already has monoshock from factory and modify this bike without any risks of
The only one I know of at the moment is the Honda GL500.

the problem here is that I live in Belgium.
Old Honda's (except for CB's) are rare to find here.

So I would like to broaden my options with some other models that come standard with the mono shock.

I am planning to make a bike with a priority solo seat and I would like to manufacture a double seat for the occasional duo ride.

i would like to build something like this: (but I know this one has a conversion to monoshock, I would use a bike with already has monoshock)


This is a custom made set up, not from any production bike, when done properly this is really the best way to go, it allows you to keep the stock geometry, as Cal stated though, it could take some working out to get the best springs for the rear shock. One of our forum members has done this type of mod to a 550, Maybe Godfrey...?
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750 K2 1000cc
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If You can't fix it with a hammer, You've got an electrical problem.

Offline b5rider

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Re: Monoshock - Wich donor bike should I use.
« Reply #8 on: February 01, 2016, 10:17:40 PM »
That's a bike Kinetic Motorcycles built. They sell the mono or dual rear shock kit for CB550s on their website

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1978 CB400A
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Offline SOHC4 Cafe Racer Fan

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Re: Monoshock - Wich donor bike should I use.
« Reply #9 on: February 02, 2016, 11:32:06 AM »
Not only do you have to consider the shock used, but also the geometry of the swingarm and attachment points for the monoshock.  You want to balance traction with dampening.  No offense, but this is really over your head as a beginner. 
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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)
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"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)

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2005 RVT1000RR RC51-SP2 "El Diablo" - Sold
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Offline output

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Re: Monoshock - Wich donor bike should I use.
« Reply #10 on: February 02, 2016, 12:59:31 PM »
I understand that.

Thats why i started this topic to find any bikes who come with monoshock standard from factory. (Aircooled).

Never the less the kinetic conversion kit looks oke.
With the help from a welder maybe this could be done.

Does anyone have any experience with the kinetic monoshock conversion kit for CB?
Does anyone know any other models who come standard with a monoshock without any modification or conversion?

Thanks!
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Offline Retro Rocket

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Re: Monoshock - Wich donor bike should I use.
« Reply #11 on: February 02, 2016, 01:27:19 PM »
Quote from: output on February 02, 2016, 12:59:31 PM
I understand that.

Thats why i started this topic to find any bikes who come with monoshock standard from factory. (Aircooled).

Never the less the kinetic conversion kit looks oke.
With the help from a welder maybe this could be done.

Does anyone have any experience with the kinetic monoshock conversion kit for CB?
Does anyone know any other models who come standard with a monoshock without any modification or conversion?

Thanks!

As I mentioned, its already been done on this site by a very competent builder, Maybe Don can link you to the thread, I'm a 750 guy, Don is more into the 500/550/650's than I am...  It is Godfrey, just find his build thread, here's the bike with his monoshock set up...


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750 K2 1000cc
750 F1 970cc
750 Bitsa 900cc
If You can't fix it with a hammer, You've got an electrical problem.

Offline SOHC4 Cafe Racer Fan

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Re: Monoshock - Wich donor bike should I use.
« Reply #12 on: February 02, 2016, 02:09:49 PM »
Haha. Maybe I should change my handle to CB550/650 Café Racer Fan!

Goddfrey did build a heck of a nice 550 monoshock bike:


MessnerMoto is in the process of building a hell of a 750 with a monoshock
http://forums.sohc4.net/index.php?topic=149894.75



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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 b5rider

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Re: Monoshock - Wich donor bike should I use.
« Reply #13 on: February 02, 2016, 07:23:00 PM »
I don't know of any 70s era bikes that came with a mono shock which would fit into the cafe genre. Most are going to be dirt bikes. You might be able to modify a dirt bike to your liking, but it would still require some fabrication skills.
I would get the Kinetic kit if your budget allows. Most others on the forum with mono shock bikes have the tools, skills necessary to build that bike safely.
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1984 Honda Elite 150
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Re: Monoshock - Wich donor bike should I use.
« Reply #14 on: February 02, 2016, 07:44:25 PM »
There isn't a swap in option from the 70's, but to see a similar option to the one I posted , look at the 70's TZ Yamaha's, they had a monoshock set up very similar to Godfrey's. the TZ just used a longer shock... I'm still no keen on the Kinetics monoshock conversion, they use a longer swingarm which is completely unnecessary and changes the bikes geometry....
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Offline mrfish2

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Re: Monoshock - Wich donor bike should I use.
« Reply #15 on: February 02, 2016, 08:31:36 PM »
Quote from: Retro Rocket on February 02, 2016, 07:44:25 PM
I'm still no keen on the Kinetics monoshock conversion, they use a longer swingarm which is completely unnecessary and changes the bikes geometry....

Their kit comes with only the bits to weld onto your stock swingarm, does it not? They don't sell a swingarm with the kit, so the geometry isn't changing.
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Re: Monoshock - Wich donor bike should I use.
« Reply #16 on: February 03, 2016, 12:17:58 AM »
Quote from: mrfish2 on February 02, 2016, 08:31:36 PM
Quote from: Retro Rocket on February 02, 2016, 07:44:25 PM
I'm still no keen on the Kinetics monoshock conversion, they use a longer swingarm which is completely unnecessary and changes the bikes geometry....

Their kit comes with only the bits to weld onto your stock swingarm, does it not? They don't sell a swingarm with the kit, so the geometry isn't changing.

Cool, the swingarm on that bike pictured above is tubular, I thought the kit included the finished arm...thanks for the clarification...
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If You can't fix it with a hammer, You've got an electrical problem.

Offline Shtonecb500

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Re: Monoshock - Wich donor bike should I use.
« Reply #17 on: July 23, 2016, 08:13:01 AM »
So if you are looking to just buy that bike as a 750 here is your bike...go ahead and buy it and have it shipped over to you from Rochester Hills, Michigan.

exact same bike from a local fab shop, donor bike is a 77 cb750 K...he DID not use the kinetic mono conversion but did his own with adjustable option per rider.
https://detroit.craigslist.org/okl/mcy/5694623535.html

beautiful bike...I would buy it if i didn't have two projects going at once sucking up all my money.
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Offline BomberMann650

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Re: Monoshock - Wich donor bike should I use.
« Reply #18 on: July 23, 2016, 11:14:15 AM »
Can I ask the obvious mono-shock question?

Why?  What's gained in doing this?
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Offline theslayedsaint

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Re: Monoshock - Wich donor bike should I use.
« Reply #19 on: July 23, 2016, 12:30:09 PM »
Quote from: BomberMann650 on July 23, 2016, 11:14:15 AM
Can I ask the obvious mono-shock question?

Why?  What's gained in doing this?

I have the same question? I like the look but does it add any performance?
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