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Author Topic: CB750k frame has been cut?  (Read 309 times)

Offline manahmana

  • Posts: 4
CB750k frame has been cut?
« on: Aug 06, 2017, 13:22:53 »
Hello all! Just started tearing into an 82 CB750K. I didnt notice this until I pulled the engine. It looks like the frame was cut where the engine mounts go? No idea why anyone would do that.

The cut is clean and was even painted over as far as I can tell.

Can this be left as is or can it just be welded back together?

Thanks for any help!!!!





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Offline Rider52

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  • Posts: 357
Re: CB750k frame has been cut?
« Reply #1 on: Aug 06, 2017, 14:45:04 »
I believe it is made that way to remove the engine. The whole lower section is removable.
Projects
74 Yamaha TX650
75 Honda CL 360 "Scrambled"
72 Honda SL350 desert sled it would make Steve McQueen puke!
3 Assorted Honda CL 72 scramblers in a million pieces
3 Harleys in constant state of sorrow and a Buell
1978 Yamaha Chappy 80 burning up the highway
Cut my motor in half Sportster to Shortster

Offline esmoojee

  • Posts: 133
Re: CB750k frame has been cut?
« Reply #2 on: Aug 06, 2017, 14:54:46 »
That is correct.  Itís a removable section to get the engine out.  Some guys weld them in permanently but I believe its for race applications. 

Offline manahmana

  • Posts: 4
Re: CB750k frame has been cut?
« Reply #3 on: Aug 06, 2017, 14:54:52 »
Dear lord. That would have made getting the engine out so much easier.... I'm still waiting on a new manual to come in the mail. I really appreciate the info!!!


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Offline manahmana

  • Posts: 4
Re: CB750k frame has been cut?
« Reply #4 on: Aug 06, 2017, 15:00:22 »
I believe it is made that way to remove the engine. The whole lower section is removable.

Thank you! That diagram will come in handy as well. Let's hope the manual comes in before I start reassembly. I should probably just wait!


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Offline manahmana

  • Posts: 4
Re: CB750k frame has been cut?
« Reply #5 on: Aug 06, 2017, 15:02:11 »
That is correct.  Itís a removable section to get the engine out.  Some guys weld them in permanently but I believe its for race applications.

Got it. Thanks for the info! I had seen some pics where it was all one piece and got a little discouraged.


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Offline TheCoffeeGuy

  • Posts: 604
  • Books, Books, Books, knowledge is within
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Re: CB750k frame has been cut?
« Reply #6 on: Aug 06, 2017, 21:57:20 »
Factpry cut!
www.thecoffeeguy.ca Not your ordinary Blog site.

1968 Harley Aermacchi ML 125 Rapido, restored
1972 Honda Cl 450 engine rebuild, a day rider soon, now sold
1980 Suzuki GS850GL Street Brat  My other day bike
2000 Harley 1200 Sport S My day bike
1982 Honda CB650 Chopper light

Offline spotty

  • Posts: 846
  • Vmax...why,yes i think i will
    • spottys world of vmax (and great danes)
Re: CB750k frame has been cut?
« Reply #7 on: Aug 06, 2017, 22:09:04 »
why couldn't they do that with the earlier SOHC's, it'd make life so much easier
short fast loud, three things punk rock and vmaxs have in common

south of the border, down melbourne way

Offline Oz350Four

  • Posts: 36
Re: CB750k frame has been cut?
« Reply #8 on: Aug 07, 2017, 06:32:27 »
Damn straight..!!
"Me speed officer... never..!!"

1972 Honda CB350 Four - Project Ol' Red
2007 Harley Davidson Softail Deuce - sold to start this project

Offline CrabsAndCylinders

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Re: CB750k frame has been cut?
« Reply #9 on: Aug 07, 2017, 16:31:59 »
As previously mentioned, you can weld these parts together in order to make a stronger frame, not sure if you would notice the change on the street but many have done this.  If done then you have to partially dismantle the engine in order to remove it.  Somewhere here there is a better description of this.  This is a great forum but you should also join this forum: http://www.cb1100f.net/.
Lighter, Quicker, Faster.
ZX-14, 900F x 2, 1100F, R100, CBR600, SR500, GT500, RZ350, KZ1000 x 2, Moto Guzzi Lemans lll, CBX550, RD 350, 750 SOHC police special, RG250, TL1000R, GT750, KTM Super Duke 1290 R, Harris/Z-1, Norton 750 Commando, Green 77 KZ650