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Author Topic: New CB350 Project - Back Breaker  (Read 23059 times)

Offline dynamitedave

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New CB350 Project - Back Breaker
« on: Jan 24, 2011, 13:54:01 »
I picked up a pile of shit CB350 from a motorcycle yard sale guy for next to nothing.  I really just needed the engine.
 
 I'm running out of styles for CB350s so it took me a little while to figure out the direction I wanted to go.
 
 I cut it up, lowered it, hard tailed it.  I plan to recess the seat and have a low gas tank.  Might have to make my own or cut up and reweld one I have laying around.
 
 This is what I started with.  You can see how much I lowered it in the front by the fork tubes sticking out the top 3".  I plan to run only a front brake, no back brake, the bike is so low the brake pedal would scrape when I turn.  I plan to use clip-ons mounted below the top plate of the triple tree.
 
 
 
 
 
 
 The look I'm going for.  Low and sexy.  It will prolly not handle good, be stiff, be dangerous but fuck it.  It should look cool.  I found a 19" front wheel in my shed I'm going to try to use.  This one is the stock 18" wheel.
 

DAYS LATER

I got some work done this weekend.  I mounted the seat support bars and did some sheet metal work.
 
 
 
 I bent the edges of the sheet metal by beating it with a body hammer over a round pipe to match the contour.
 
 
 Fully welded. Almost.
 

Offline joeficsit

  • Posts: 38
Re: New CB350 Project - Ball Breaker
« Reply #1 on: Jan 24, 2011, 13:58:31 »
i thought cb350's came with 19" fronts?  that's good to know that some came with 18's so that i can use it on my cb200.  keep up the good work.

Offline dynamitedave

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Re: New CB350 Project - Ball Breaker
« Reply #2 on: Jan 24, 2011, 14:25:57 »
CL350s came with 19" front wheels
CB350s and CB360s all had 18" wheels.

My CB350 Bobber has a 21" front wheel that came off a '72/'73 SL350.  Uses the same street hub as the CB350s with front drum brakes.  Wish I could find some more of them.

Offline dynamitedave

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Re: New CB350 Project - Ball Breaker
« Reply #3 on: Jan 26, 2011, 12:44:56 »
I cut a 2" section out of a gas tank, looks good, need to weld it up tho.


Also made a little tray to recess the battery in the swing arm

Offline VonYinzer

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Re: New CB350 Project - Ball Breaker
« Reply #4 on: Jan 26, 2011, 12:55:34 »
Wow... Well, its different for sure.
Like a river that don't know where it's flowin'
I took a wrong turn and just kept goin'

Offline VonYinzer

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Re: New CB350 Project - Ball Breaker
« Reply #5 on: Jan 26, 2011, 12:56:52 »
Seems way too low to be rideable man. Maybe thats just because its sitting on the table though.
Like a river that don't know where it's flowin'
I took a wrong turn and just kept goin'

Offline VonYinzer

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Re: New CB350 Project - Ball Breaker
« Reply #6 on: Jan 26, 2011, 12:59:06 »
Also... It the backbone only welded into the stamped steel at the bottom of the neck with the top just made from sheet metal?
Like a river that don't know where it's flowin'
I took a wrong turn and just kept goin'

Offline VonYinzer

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Re: New CB350 Project - Ball Breaker
« Reply #7 on: Jan 26, 2011, 13:00:58 »
Ok, last one... Are you aware that as you have it built now, that frame is probobly going to fold in half? Not trying to be a dick, but you could really get hurt.
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 #8 on: Jan 26, 2011, 14:30:45 »
This is why I usually don't post up my bikes until they are done.  There is always someone who thinks they are a mechanical engineer.  I didn't show every little detail but the backbone is welded in the neck along with added supports, it's welded to the existing pressed sheet metal frame and tied into the main structure with added support.  The sheet metal I used is the same gauge or thicker than the existing sheet metal.  It's much stronger than a stock frame which it needs to be since this is a hard tail.

The bike is low but not too low, I rolled it outside and checked before I welded it in place.  It's too low to use the stock foot pegs since it has that bar that comes under the engine.  I'm also not running a rear brake so the pedal won't get in the way.


Offline VonYinzer

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Re: New CB350 Project - Ball Breaker
« Reply #9 on: Jan 26, 2011, 14:45:40 »
Wow man... You dont have to be a jackass.
The fact is that if its not perfect, it can fail. Some of the things in your pics look shady. If you did more work to sure everything up, than show that too.
I never said I was an "engineer", just asking questions to look out for/help out fellow builders.
Since you apparently have it all wrapped up just fine, good. When/if it fails, I hope youre wearing a helmet.

In the end its your ass... Do whatever the hell you want. If you dont want people commenting/asking questions, dont post pics.

Best of luck.
Like a river that don't know where it's flowin'
I took a wrong turn and just kept goin'