Frameless frame

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mike_mn
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Frameless frame

Post by mike_mn » Mon Aug 31, 2015 11:33 pm

Does anyone have any experience building a frameless frame, meaning the motor is a structural part of the frame with no down tubes other than to connect to the top of the engine? I am doing some reaserch on whether or not it would be feasible with an old goldwing engine, since it has 4 mounting points on each side, I was hoping to let that big timing cover hang out in the open without down tubes. Only found one example of an old kaw while searching, but not much info on it.

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Re: Frameless frame

Post by hansgoudzwaard » Tue Sep 01, 2015 6:01 pm

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Well?
hondaconcept.JPG (82.48 KiB) Viewed 1947 times
&&&

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mike_mn
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SELF INTRODUCTION: I like motorcycles and am interested in potentially building/heavily customizing one for myself. I am 40yrs old and have a wife and a bunch of kids. My first bike was when I was 12yrs old. It was a Suzuki RM100 1978 that I got for free from a neighbor. It had a crack in the case from a chain that broke. I spent the summer fixing it. My parents just smiled and brought me to the places I needed to go to get parts or have the case welded. They thought it would keep me out of trouble so they didn't ask a lot of questions and kept encouraging me. I finished the bike that Summer and kept it about 10 years before passing it on to another teen for free.

Re: Frameless frame

Post by mike_mn » Tue Sep 01, 2015 11:54 pm

I am impressed you found one. Not as simple or elegant as I would hope to do it, but it does lend a bit of credibility to the idea. Thanks for the reply.

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I started a project build there " File and Fit." I paln to continue that when I go back home in Dec. 2011. I first joined the board when Gary W had it in the year 2005. That was the time I really gained an interest in building chops. I have a long way to go, compared to some here.

Re: Frameless frame

Post by hansgoudzwaard » Wed Sep 02, 2015 1:12 am

mike_mn wrote: but it does lend a bit of credibility to the idea. Thanks for the reply.
You could easily "recreate/reverse engineer " this in a early Buell or Ducati style frame, using small diameter tubing .

I originally saw this image online 15 years ago. I have liked it ever since.

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Re: Frameless frame

Post by gearhead1951 » Wed Sep 02, 2015 5:11 am

Do a little research on the Vincent motorcycle ! Remove the engine/trans and all that is left is a small pile of parts that constitute the "frame" !!

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mike_mn
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SELF INTRODUCTION: I like motorcycles and am interested in potentially building/heavily customizing one for myself. I am 40yrs old and have a wife and a bunch of kids. My first bike was when I was 12yrs old. It was a Suzuki RM100 1978 that I got for free from a neighbor. It had a crack in the case from a chain that broke. I spent the summer fixing it. My parents just smiled and brought me to the places I needed to go to get parts or have the case welded. They thought it would keep me out of trouble so they didn't ask a lot of questions and kept encouraging me. I finished the bike that Summer and kept it about 10 years before passing it on to another teen for free.

Re: Frameless frame

Post by mike_mn » Wed Sep 02, 2015 9:25 am

gearhead1951 wrote:Do a little research on the Vincent motorcycle ! Remove the engine/trans and all that is left is a small pile of parts that constitute the "frame" !!
Odd that I never noticed that. My avatar is Rollie Free doing his world land speed record run on a Vincent Black Lightning in his underware...gotta love the Vincent's...

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Re: Frameless frame

Post by gww25 » Tue Sep 08, 2015 2:11 pm

Keep in mind that frames like this are designed around powerplants that have also been designed to become a structural element. Not all motor/tranny assemblies will qualify or be up to the task of handling the stress of becoming part of the frame.

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I started a project build there " File and Fit." I paln to continue that when I go back home in Dec. 2011. I first joined the board when Gary W had it in the year 2005. That was the time I really gained an interest in building chops. I have a long way to go, compared to some here.

Re: Frameless frame

Post by hansgoudzwaard » Fri Sep 11, 2015 5:09 pm

gww25 wrote:Keep in mind that frames like this are designed around powerplants that have also been designed to become a structural element. Not all motor/tranny assemblies will qualify or be up to the task of handling the stress of becoming part of the frame.
Good advice, I did not think of that. The castings may not be strong enough in the mount areas.

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SELF INTRODUCTION: I am an expat tennessee hillbilly and retired us navy engineer livin' in Scotland and I have a love of old cars , trucks, motorcycles and most any other machinery !

I dont know if I can think of enough to say to reach the two hundred charactor minimun set by the mods , but I will persevere
Location: Greenock Scotland

Re: Frameless frame

Post by gearhead1951 » Sat Sep 12, 2015 6:07 pm

Use multiple mount areas , create struts between two points that you think need to share the load , THINK and do your research and ask as many questions as you have to !

That's what we are here for !

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Re: Frameless frame

Post by Russ » Thu May 12, 2016 8:54 am

Hello,

Don't know if it's of any help but a British guy called Twizzle built a frameless Triumph some years back. He used the exhaust as a stressed member. If you google Twizzle custom bikes you should be able to find him

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Re: Frameless frame

Post by Dusty-Dave » Thu May 12, 2016 10:50 am

I certainly wouldn't tie to the heads like Vincent did on an engine without cylinder studs that went all the way from case to the head. Image
But with a little thought n where to attach I would think most engines would work for a frame member.
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And you know that notion just crossed my mind.

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Re: Frameless frame

Post by hansgoudzwaard » Fri May 13, 2016 11:40 am

If this is yours, do you have more details or build pics?

Dusty-Dave
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SELF INTRODUCTION: Hi,
Been building and riding since the 60s. My last contest build made The Horse BC last year "Home Built Indian" and had a 40 Indian in the TCU section of the Horse BC the year before.
Iv'e answered to Dusty since 69
Thanks
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Re: Frameless frame

Post by Dusty-Dave » Fri May 13, 2016 8:28 pm

Not mine I grabbed the pic off the net to illustrate how Vincent did it. I did get to ride a Black Shadow a few years ago, it was amazing! It handled way better than the magazines said.
Driving that train, high on cocaine,
Casey jones is ready, watch your speed.
Trouble ahead, trouble behind,
And you know that notion just crossed my mind.

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Re: Frameless frame

Post by Customize IT » Sat May 14, 2016 9:45 pm

Russ wrote:Hello,

Don't know if it's of any help but a British guy called Twizzle built a frameless Triumph some years back. He used the exhaust as a stressed member. If you google Twizzle custom bikes you should be able to find him
Twizzle is a Legend and a Master builder!

Here are some of Twizzle's frames of this type.

He uses only stress member sport bike engines designed for it in the castings. My Busted Rubber bike was inspired by his frames.

Image

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MAKE IT YOURS!!!

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hansgoudzwaard
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SELF INTRODUCTION: I was on the last board as bonustoolkit. I have changed that to my given name.
I started a project build there " File and Fit." I paln to continue that when I go back home in Dec. 2011. I first joined the board when Gary W had it in the year 2005. That was the time I really gained an interest in building chops. I have a long way to go, compared to some here.

Re: Frameless frame

Post by hansgoudzwaard » Sun May 15, 2016 9:55 pm

Image


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Reminds me of Ron Finch.

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