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Author Topic: Did I buy a Chopper Frame? (CB 750)  (Read 2487 times)

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NickBee

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Did I buy a Chopper Frame? (CB 750)
« on: April 22, 2006, 02:35:28 PM »
Hey Guys…

I got a ’76 CB750 Frame off ebay last year.  Starting the moch-up on my café racer project and I notice things were not going together well on the swing arm (spacing of the hub / axel / spacers).  Figured I had a bent swing arm so I got a replacement on ebay.  When my new swing arm came in it was about 4 inches shorter.  And that would explain the brake stay that came with the frame having a 4 inch extension welded in the middle.  But now my question is with the rake angle.  I’m wondering if that was messed with also.  Here are some pics, tell me what you think, or what measurements I can make to be sure.

Thanks! 
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Offline scondon

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Re: Did I buy a Chopper Frame? (CB 750)
« Reply #1 on: April 22, 2006, 04:14:42 PM »
I'm no expert, but judging from the extra welds and the space between your front wheel and frame I would say yes, it's been "raked".

  Measuring straight from the frame downtube (at the left engine mount) to the front tire I have a 8" space, 750F. Hopefully someone else will chime in with a more "data specific" answer :) :)
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Offline Terry in Australia

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Re: Did I buy a Chopper Frame? (CB 750)
« Reply #2 on: April 22, 2006, 04:20:23 PM »
Yep, there's been some cutting and some shutting done on that frame, it'd be good for a drag bike, (with the extended swingarm, that's probably what it came off anyway) but not a good "Cafe" candidate, unless you don't want to go around corners in a hurry, ha ha! Cheers, Terry. ;D
« Last Edit: April 22, 2006, 04:21:57 PM by Terry in Australia »
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Offline Dusthawk

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Re: Did I buy a Chopper Frame? (CB 750)
« Reply #3 on: April 22, 2006, 04:47:46 PM »
Yup, thats a chopper all right. Look at your frame then at my avatar, see what I mean? At least they did a decent chop job on it. ;D

Peace and Lond Rides,

Jeff 8)
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NickBee

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Re: Did I buy a Chopper Frame? (CB 750)
« Reply #4 on: April 23, 2006, 08:07:07 AM »
Great!!!

Thanks guys for the quick response.  I guess I'm back to searching for a frame.  It's a same since this one had a nice clean title. 

Let me know if anyone on here wants this one. I'll be putting it up on ebay if not...

Thanks!
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Offline heffay

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Re: Did I buy a Chopper Frame? (CB 750)
« Reply #5 on: April 23, 2006, 09:34:09 AM »
Quote from: NickBee on April 23, 2006, 08:07:07 AM
It's a same since this one had a nice clean title. 

oh ok... wait, what?    ???
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Offline crazypj

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Re: Did I buy a Chopper Frame? (CB 750)
« Reply #6 on: April 23, 2006, 12:16:34 PM »
I dont see any 'extra' material welded in (the pressings match), just cut head off 'good' frame and welded onto frame with a different headstock (and different numbers), presto, legal frame and good bike/engine. The extra space on front wheel/tyre is due to the 6"over fork tubes (ok maybe 4"over)
Maybe not a chopper, maybe a 'ringer'?
PJ
« Last Edit: April 23, 2006, 12:19:05 PM by crazypj »
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cd811

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Re: Did I buy a Chopper Frame? (CB 750)
« Reply #7 on: April 23, 2006, 12:24:25 PM »
your profile don,t say where you are...I got a stock rolling chassis...we can swap
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NickBee

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Re: Did I buy a Chopper Frame? (CB 750)
« Reply #8 on: April 23, 2006, 01:00:41 PM »
I'm in northern, NJ... might be far for a swap.  Unless we just ship the frames to each other...

The forks are OEM (I think) and were bought seperate from the frame.
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NickBee

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Re: Did I buy a Chopper Frame? (CB 750)
« Reply #9 on: April 23, 2006, 01:03:05 PM »
Quote from: heffay on April 23, 2006, 09:34:09 AM
Quote from: NickBee on April 23, 2006, 08:07:07 AM
It's a same since this one had a nice clean title. 

oh ok... wait, what?    ???

same = shame... fricken typos!
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cd811

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Re: Did I buy a Chopper Frame? (CB 750)
« Reply #10 on: April 23, 2006, 01:17:13 PM »
sorry... :( too far
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Offline crazypj

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Re: Did I buy a Chopper Frame? (CB 750)
« Reply #11 on: April 23, 2006, 07:21:26 PM »


The forks are OEM (I think) and were bought seperate from the frame.
Quote

Whats the overall length, top to axle?
PJ
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NickBee

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Re: Did I buy a Chopper Frame? (CB 750)
« Reply #12 on: April 23, 2006, 09:02:29 PM »
Quote from: crazypj on April 23, 2006, 07:21:26 PM


The forks are OEM (I think) and were bought seperate from the frame.
Quote

Whats the overall length, top to axle?
PJ

30" from the top of the top fork bolt wo the center of the axle.  Is this OEM or an extended tube?  Thanks!
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Offline Terry in Australia

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Re: Did I buy a Chopper Frame? (CB 750)
« Reply #13 on: April 25, 2006, 06:31:17 PM »
Quote from: NickBee on April 23, 2006, 09:02:29 PM
Quote from: crazypj on April 23, 2006, 07:21:26 PM


The forks are OEM (I think) and were bought seperate from the frame.
Quote

Whats the overall length, top to axle?
PJ

30" from the top of the top fork bolt wo the center of the axle.  Is this OEM or an extended tube?  Thanks!

OEM. ;D
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I was feeling sorry for myself because I couldn't afford new bike boots, until I met a man with no legs.

So I said, "Hey mate, you haven't got any bike boots you don't need, do you?"

"Crazy is a very misunderstood term, it's a fine line that some of us can lean over and still keep our balance" (thanks RB550Four)

Offline Sam Green Racing

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Re: Did I buy a Chopper Frame? (CB 750)
« Reply #14 on: April 25, 2006, 06:52:14 PM »
Hi Tell, I can see your point on the drag race chassi idea, I thought that myself at first.

The give away to it perhaps being a chop is the horn mounting bracker is still in place.

Sam.
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Offline Terry in Australia

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Re: Did I buy a Chopper Frame? (CB 750)
« Reply #15 on: April 25, 2006, 07:00:31 PM »
Quote from: samcr750 on April 25, 2006, 06:52:14 PM
Hi Tell, I can see your point on the drag race chassi idea, I thought that myself at first.

The give away to it perhaps being a chop is the horn mounting bracker is still in place.

Sam.

Good pick-up Sammy, and I know extended swingarms were popular with the chopper-isti, still, if someone wanted a drag bike with a horn............ ;D
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I was feeling sorry for myself because I couldn't afford new bike boots, until I met a man with no legs.

So I said, "Hey mate, you haven't got any bike boots you don't need, do you?"

"Crazy is a very misunderstood term, it's a fine line that some of us can lean over and still keep our balance" (thanks RB550Four)

Offline Sam Green Racing

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Re: Did I buy a Chopper Frame? (CB 750)
« Reply #16 on: April 25, 2006, 07:13:26 PM »
Fit a matching bracket (correct spelling this time  ;D) on the other side, then fit the oil cooler on them like we did with the CR. ;)

Sam.
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C95 sprint bike.
CB95 hybrid race bike
CB95 race bike
CB92
RS 175. sprint/land speed bike
JMR Racing CB750A street ET drag bike

NickBee

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Re: Did I buy a Chopper Frame? (CB 750)
« Reply #17 on: April 28, 2006, 08:32:23 PM »
Quote from: Terry in Australia on April 25, 2006, 06:31:17 PM
Quote from: NickBee on April 23, 2006, 09:02:29 PM
Quote from: crazypj on April 23, 2006, 07:21:26 PM


The forks are OEM (I think) and were bought seperate from the frame.
Quote

Whats the overall length, top to axle?
PJ

30" from the top of the top fork bolt wo the center of the axle.  Is this OEM or an extended tube?  Thanks!

OEM. ;D

Thanks Terry,, that's one part I won't have to re-order..
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