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Author Topic: New CB350 Project - Back Breaker  (Read 30552 times)

Offline VonYinzer

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Re: New CB350 Project - Ball Breaker
« Reply #10 on: Jan 26, 2011, 14:55:09 »
And really... Why wouldnt you just build a real hardtail anyway?
Like a river that don't know where it's flowin'
I took a wrong turn and just kept goin'

Offline dynamitedave

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Re: New CB350 Project - Ball Breaker
« Reply #11 on: Jan 26, 2011, 16:22:04 »
Easy killer.  I don't think I was a jackass, I'm just having fun.  I'm not going to take a million pictures showing everything I do to the bike and post them up, that would take forever and be boring.  I post up pictures of good progress with the idea that viewers can use their imagination and fill in the blanks.

Build a real hardtail?  You mean buy a pre fabricated frame and bolt parts on it?  That wouldn't be any fun.  I like cutting, forming, shaping and welding metal.

Offline VonYinzer

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Re: New CB350 Project - Ball Breaker
« Reply #12 on: Jan 26, 2011, 16:53:14 »
No. I mean a frame that doesnt use the swingarm as part of the "hardtail". Again, its your bike. Do whatever the hell you want. But if you post pics of unsafe mods, people will call you out. I also dont know of any bobber/chopper builds here that are all "bolt on" cookie cutter deals so Im not sure what that comment was about. And really man, I wasnt giving you a hard time. I was asking reasonable questions about the integrity of your frame. Seeing as you apparently have it all under control, forget I asked. Best of luck.
Like a river that don't know where it's flowin'
I took a wrong turn and just kept goin'

Offline PHeller

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Re: New CB350 Project - Ball Breaker
« Reply #13 on: Jan 26, 2011, 20:43:23 »
Despite the structural integrity of the rear frame, I'll just comment on the design.


It doesn't look cool. I don't like seeing the swingarm joints. The whole rear looks pretty messy. I'm not seeing any flow to the lines, not only that it doesn't have the cool "open area" left in the rear frame on a proper hardtail.


The front is pretty rad though. Nice call on the tank chop and hiding the front frame gussets.


I'd try to simplify the rear and make it flow with the front frame sections.

Offline dynamitedave

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Re: New CB350 Project - Ball Breaker
« Reply #14 on: Jan 26, 2011, 22:55:07 »
I left the swing arm in tact for ease of building.  Leaving the swing arm mounted ensures the back tire winds up where isn't supposed to, also ensures the sprockets line up and the tire is true horizontally and vertically.  Someday I'll build a jig to hold everything in place for now I did it this way. 

The "open area" you call cool looks ridiculous to me.  I don't like when they stretch out the bikes and have a big voided space between the rear wheel and engine. 

I think it will all come together when the bike is painted and all the parts are on it.  Most people won't even notice the swing arm is bolted in.

Offline Ringo

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Re: New CB350 Project - Ball Breaker
« Reply #15 on: Jan 26, 2011, 23:18:07 »
The swinger was the first thing I noticed too.  Again, like everyone here, not trying to be a dick, but when you spend that much time welding up the frame...and leave the swing arm...?  It looks like any other half-assed "hard tail" people post up.  Give yourself some credit and don't cut that corner.  I know I would regret it down the road when I admired my bike.  Hope you don't!
Chris

Offline Slice

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Re: New CB350 Project - Ball Breaker
« Reply #16 on: Jan 27, 2011, 11:50:22 »
There is clearly a lot of questions surrounding the safety of this build... You question it yourself in your first post when you say "It will prolly not handle good, be stiff, be dangerous but fuck it. " Having said that, you already understand that fact, so no one needs to point it out to you.
From an aesthetic persepctive, i cant see what it will look like but I have a feeling its not going to be my 'bag of tricks'... however, to each their own!
Good luck man.

Slice
The difference between a 'bike builder' and a 'parts collector' is a fine line.
 
1966 Honda 305 Dream: http://www.dotheton.com/forum/index.php?topic=18950.80

1977 Honda CB550K: http://www.dotheton.com/forum/index.php?topic=26058

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Offline Beard

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Re: New CB350 Project - Ball Breaker
« Reply #17 on: Jan 27, 2011, 11:55:25 »
just weld the swingarm solid
 
im guessing u dont want the front of ur seat angling down...
so add another pipe from the rear to the main frame beam to level out your seating.
then cross ur fingers
 
 
running without a 2nd brake... is sketchy.
 
may i suggest these
Jack of everything, Master of nothing.
79 KZ650
http://www.dotheton.com/forum/index.php?topic=14667.0

Offline tWistedWheelz

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Re: New CB350 Project - Ball Breaker
« Reply #18 on: Jan 27, 2011, 12:34:02 »
I think this whole thing has been blown way out of proportion! I think the work done on the rear end is structurally sound given you add some gussets, which I am sure you plan on doing. I see no problems with your welds, they look great and I think you have ample support for the rear end. If it were me, I would leave the swinger as you have for my jig and then weld another tube from the bottom frame rails back to the swinger just in front of the axel and lose the rest of the swinger then. The structure will be supported then and no longer require the swinger for a jig, and that may very well be your plan. Where the work does raise concern to me is the top part of the frame where it meets the neck. I think with all the work you are doing and the skill you have, it would be no problem for you to get rid of all that stamped steel and put in a solid tube spine. Once that and the swinger are removed you could gusset up and clean up the old lower backbone area that is stamped steel. As far as being unsafe, well I am not sure if it is or is not with what you have done on the neck area, I simply can't tell from photos what all work you have done there, but I do know that a solid single tube would clean it all up nice and offer you better support than the old stamped steel. I really dig that low seat and it seems to me that with the one added support I mentioned, you would actually have more support that needed to be safe there. I hope all of this lashing you have received does not hinder you from this site or from showing us your work. This is a really nice bunch here and sometimes as a regard to safety, some people can come across wrong. Text does not carry attitude with it well sometimes, and it may come across derogatory when it was intended to be constructive. Good luck on your build. I will be excited to see what you come up with!

Cheers,
Brandon

Offline VonYinzer

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Re: New CB350 Project - Ball Breaker
« Reply #19 on: Jan 27, 2011, 12:59:21 »
The problem is Brandon that there is no "neck tube" on a 350. Its all stamped steel. Just a few layers of it. When you cut that away, its nearly impossible to make it strong enough. And honestly, I wasnt trying to give you a hard time man. I just dont want to see ya put a ton of time/effort into a build and have it be dangerous or unrideable. Im down with your effort to do something different than whats out there. Just didnt want to see it be a futile effort.
Like a river that don't know where it's flowin'
I took a wrong turn and just kept goin'