Author Topic: Dorothy III - CB750  (Read 89087 times)

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Offline seanbarney41

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Re: Dorothy III - CB750
« Reply #275 on: August 28, 2015, 07:26:34 pm »
damn, end of an sohc era

...just make sure that Dorothy rides again someday...


You gotta turn in plates in Virginia to avoid late fees or something?
If it works good, it looks good...

Online 70CB750

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Re: Dorothy III - CB750
« Reply #276 on: August 29, 2015, 04:23:42 am »
If I keep the plate, she would have to stay insured. Easier to register her again once she is ready.

She needs transmisson overhaul for sure, 2nd is jerky. I was not using second for few years now :). I want to see how is the head and cylinders too, most likely total check and if needed overhaul of the engine.

After that, not sure. Going back to original would be too expensive and I dont think I am anal enough to "edwardmorris" her :)



Offline Stev-o

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Re: Dorothy III - CB750
« Reply #277 on: August 29, 2015, 07:34:05 am »


She needs transmisson overhaul for sure, 2nd is jerky.





When the time comes, let me know what you need as far as engine parts, I will donate towards the rebuild if I have them in stock.
'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Online 70CB750

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Re: Dorothy III - CB750
« Reply #278 on: August 30, 2015, 04:53:16 am »


She needs transmisson overhaul for sure, 2nd is jerky.



When the time comes, let me know what you need as far as engine parts, I will donate towards the rebuild if I have them in stock.

Thank you, Steve.

Offline edwardmorris

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Re: Dorothy III - CB750
« Reply #279 on: August 30, 2015, 12:33:26 pm »
................I dont think I am anal enough to "edwardmorris" her :)

LOL that's a thing now? ;D ;D

Offline Stev-o

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Re: Dorothy III - CB750
« Reply #280 on: August 30, 2015, 12:48:47 pm »
................I dont think I am anal enough to "edwardmorris" her :)

LOL that's a thing now? ;D ;D

Yes...symptoms are searching and buying every NOS CB750 part and emptying your bank account on said parts!
'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Online 70CB750

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Re: Dorothy III - CB750
« Reply #281 on: September 08, 2015, 03:36:30 am »
Forgot all about this, carburetor stay was likely the first thing I made for Dorothy.  I broke the original getting carbs off, made new one from 6061.

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Re: Dorothy III - CB750
« Reply #282 on: September 08, 2015, 03:37:24 am »
I will have her boxed and engine on the bench in next week or two. 

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Re: Dorothy III - CB750
« Reply #283 on: September 08, 2015, 03:39:46 am »
One special picture for Stev-o  ;D

Still gotta make good on the promise I will shoot the seat up.

Offline MoMo

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Re: Dorothy III - CB750
« Reply #284 on: September 08, 2015, 07:36:35 am »
Forgot all about this, carburetor stay was likely the first thing I made for Dorothy.  I broke the original getting carbs off, made new one from 6061.


You should made those and resell Prokop...Larry

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Re: Dorothy III - CB750
« Reply #285 on: September 08, 2015, 07:39:16 am »
Forgot all about this, carburetor stay was likely the first thing I made for Dorothy.  I broke the original getting carbs off, made new one from 6061.

You should made those and resell Prokop...Larry

 ;D  I am a prototype guy

But if you need something, let me know.  :)

Offline MoMo

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Re: Dorothy III - CB750
« Reply #286 on: September 08, 2015, 07:43:26 am »
Forgot all about this, carburetor stay was likely the first thing I made for Dorothy.  I broke the original getting carbs off, made new one from 6061.

You should made those and resell Prokop...Larry

 ;D  I am a prototype guy

But if you need something, let me know.  :)


Needed one a couple years ago but I was fortunate to find an Amish welder who repaired my broken in two one for the tidy sum of $5. That was all he asked for, I gave him 10...Larry

Offline Stev-o

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Re: Dorothy III - CB750
« Reply #287 on: September 08, 2015, 12:30:52 pm »
One special picture for Stev-o  ;D

Still gotta make good on the promise I will shoot the seat up.

I'm holding you to that!
'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

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Re: Dorothy III - CB750
« Reply #288 on: September 09, 2015, 03:51:38 am »
Tsubaki Omega 63" versus 63.5" - less than one percent strech - at least another 20 000 miles left in it.

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Re: Dorothy III - CB750
« Reply #289 on: September 10, 2015, 07:20:54 am »
Just a little note to myself:


Offline MCRider

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Re: Dorothy III - CB750
« Reply #290 on: September 10, 2015, 07:32:29 am »
Got a link for that?

OH I just saw the .com logo.
Ride Safe:
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Re: Dorothy III - CB750
« Reply #291 on: September 13, 2015, 07:06:24 am »
Under the knife.

Offline calj737

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Re: Dorothy III - CB750
« Reply #292 on: September 13, 2015, 07:11:22 am »
is that a picture of an Arse-endectomy, or do you call that giving your bike a Kardashenectomy?
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Offline Stev-o

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Re: Dorothy III - CB750
« Reply #293 on: September 13, 2015, 07:23:01 am »
What's the plan for the frame?
'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Offline seanbarney41

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Re: Dorothy III - CB750
« Reply #294 on: September 13, 2015, 07:28:23 am »
Prokop, how many miles did you end up putting on that thing?  Awsome to see a bike that used up...even more awsome that you are gonna rebuild it!
If it works good, it looks good...

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Re: Dorothy III - CB750
« Reply #295 on: September 13, 2015, 07:46:08 am »
The afternarket odometer was 8000 when I got it. Put 25000 miles on her. Parts are pretty shabby - except chain, tires, coils - stuff that made her run.  She must be at least 50 000 or more.

Plans? Not sure, the frame has to be stripped and checked for weak spots. I know i am not restoring her to original, the exhaust is the most prohibitive reason.

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Re: Dorothy III - CB750
« Reply #296 on: September 14, 2015, 03:34:40 am »
Got the engine on the bench, pulled the cover to see the goodies.

Also checked the compression:

1: 110,110,110
2: 105,100,100
3:107,110,109
4:108,109,110

The Autozone gauge had rubber hose on it.

4 years ago it was 120,120,130,120 with different compression gauge.

But still, good numbers.

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Re: Dorothy III - CB750
« Reply #297 on: September 14, 2015, 03:38:49 am »
There is nothing visibly wrong with the valve train, but the cover had me puzzled.  Looks like the aftermarket tappet hole caps need to be removed to get the cover off.

Hole caps also scraped some of the beautiful blue frame paint, as you can see.   I am devastated  ;D

Offline Stev-o

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Re: Dorothy III - CB750
« Reply #298 on: September 14, 2015, 06:35:36 am »


Hole caps also scraped some of the beautiful blue frame paint, as you can see.   I am devastated

That is sad news.  No choice but to repaint.
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Re: Dorothy III - CB750
« Reply #299 on: September 21, 2015, 04:34:20 am »
She is all squirreled away, parts wrapped in greasy rags or stretchtite.  Only the engine for now, will work on it through the winter, but I think I need a rottiserie stand first.