« previous next »
Pages: [1] 2  All   Go Down

Author Topic: This can't be good  (Read 2714 times)

0 Members and 2 Guests are viewing this topic.

Offline SKTP

  • Master
  • *****
  • Posts: 1,792
This can't be good
« on: July 27, 2009, 02:31:47 AM »


This is the bottom of my frame on my 1978 CB750K. Its on the kickstand side near the front...I searched for "frame holes" and came up with nothing....PLEASE HELP!!!...its my daily driver so it doesn't have to be pretty...I'm hoping a good mechanic/welder can cut out the rust and weld on a new piece of metal?...all suggestions for a solution welcome
« Last Edit: July 27, 2009, 02:34:35 AM by SKTP »
Logged
1978k rebuild thread http://forums.sohc4.net/index.php?topic=68423.0
BIKE OF THE MONTH - OCTOBER 2017
2003 Ducati M800ie
1997 Honda CR-V
2004 Honda CR-V
1966 Honda S90

Offline clarkjh

  • Expert? If only.
  • Expert
  • ****
  • Posts: 1,385
  • Surely and Samson are now Co-habitating
Re: This can't be good
« Reply #1 on: July 27, 2009, 02:55:04 AM »
Sorry to say, but I think that frame is toast.  Unless you know or can find a really good wielding shop that could bend and wield in a whole new piece.

James
Logged
SOHC/4 #3328
SOHC/4 Gallery: http://www.sohc4.us/gallery/v/members/personal/clarkjh/
1974 CB550, 40000 Miles
1980 GL1100, 102789 KM - Back on the road after a complete engine rebuild. 
*** Why, oh why, is it always head gaskets with me?***

Offline CBJoe

  • Master
  • *****
  • Posts: 1,975
Re: This can't be good
« Reply #2 on: July 27, 2009, 03:00:11 AM »
I wouldn't be riding that bike until you replace the frame.  NOT SAFE...

If you have rust through like that there, I'd be that other places have the same problem (even if you cant see it yet).

Sorry... Joe
Logged
'07 Bonneville Black
'15 Moto Guzzi California 1400
CB750K2 Hot Rod Revival http://forums.sohc4.net/index.php/topic,171693.0.html
'65 CB77
'66 CM91 (C90'ish)

Offline Deltarider

  • Really Old Timer ...
  • *******
  • Posts: 8,126
  • ... but some animals are more equal than others.
Re: This can't be good
« Reply #3 on: July 27, 2009, 03:01:47 AM »
Quote
Sorry to say, but I think that frame is toast.

Not necessarily. If it's local (due to parking in long grass for instance), it can be welded easily.
Logged
CB500K2-ED Excel black
"There is enough for everyone's need but not enough for anybody's greed."

Offline manjisann

  • Hazardous Chemical Inhalation
  • Master
  • *****
  • Posts: 1,828
Re: This can't be good
« Reply #4 on: July 27, 2009, 04:03:00 AM »
A couple options, sourcing another titleable frame (I know it's not what you want to hear, but it is an option), cutting the entire piece out and welding in another one (I am no expert, far from it, but you have to be careful where you place your weld as stesses could break either the weld or the metal next to it), throw in the towel and turn it into a chopper  ;) . I have no idea what welding would cost, you may luck out and find a frame you could use.

Any way you go, thats a real bummer, sorry  >:(

Brandon
Logged
Sure it's for sale! How much you ask?? Well, how much are you willing to pay??? Now triple it, that's the price!

1973 CB500 K2 - Sold the bike and bought a Mig, Miss the bike, Love the Mig :D
1980 CB650 Custom
1971 CB500 Frame 650 engine: Project

Trip and General Ramblings blog: manjisann.blogspot.com

Offline mcpuffett

  • Master
  • *****
  • Posts: 2,354
Re: This can't be good
« Reply #5 on: July 27, 2009, 04:05:15 AM »
You could cut the same piece (but in good shape) out of a donor frame and have it welded in but i think you may have to take your engine out to do a really good job? is that right under a lower engine mount?, cheers Mick.
Logged
Honda CB750 KO 1970,   Honda VTX 1300 2006, Lancaster England.

Offline Bill Vaughan

  • Enthusiast
  • **
  • Posts: 220
Re: This can't be good
« Reply #6 on: July 27, 2009, 05:15:12 AM »
Ouch.

Send the picture/talk to these guys:   http://www.snowcrest.net/gte/
Logged
1972 Z50A
1973 ST90
1975 CL360
1971 CB450
1975 CB550
1978 FLH
2003 FLSTS
2006 FLHRSI

Offline mlinder

  • "Kitten Puncher"
  • Really Old Timer ...
  • *******
  • Posts: 5,013
  • Stop Global Tilting now!
    • Moto Northwest
Re: This can't be good
« Reply #7 on: July 27, 2009, 05:55:59 AM »
Where are you? I have a titled frame you could have, if you come dissasemble the bike.
Logged
No.

Offline bryanj

  • Really Old Timer ...
  • *******
  • Posts: 14,013
  • CB500 Number 1000036
Re: This can't be good
« Reply #8 on: July 27, 2009, 06:33:43 AM »
I think thats the 3rd 77/78 550 i seen do that---in the same place too.

It can be welded with care, and i would say a BIG patch would be OK but unsightly, trouble is engine and exhausts need to come off so its time
Logged
Semi Geriatric ex-Honda mechanic and MOT tester (UK version of annual inspection). Garage full of "projects" mostly 500/4 from pre 73 (no road tax in UK).

Remember "Its always in the last place you look" COURSE IT IS YOU STOP LOOKIN THEN!

Offline SKTP

  • Master
  • *****
  • Posts: 1,792
Re: This can't be good
« Reply #9 on: July 27, 2009, 06:52:28 AM »
WOW...this sucks and is totally unexpected...I know someone that is selling 2 78s both for under $1000 (each). I guess I'm going to check those out ASAP...thanks for your input SOHCers

I wonder how fast someone that has never removed a whell can transfer frames? Wish me luck...
Logged
1978k rebuild thread http://forums.sohc4.net/index.php?topic=68423.0
BIKE OF THE MONTH - OCTOBER 2017
2003 Ducati M800ie
1997 Honda CR-V
2004 Honda CR-V
1966 Honda S90

Offline mlinder

  • "Kitten Puncher"
  • Really Old Timer ...
  • *******
  • Posts: 5,013
  • Stop Global Tilting now!
    • Moto Northwest
Re: This can't be good
« Reply #10 on: July 27, 2009, 06:58:51 AM »
Where are you located?
Logged
No.

Offline SKTP

  • Master
  • *****
  • Posts: 1,792
Re: This can't be good
« Reply #11 on: July 27, 2009, 07:43:10 AM »
Southern California
Logged
1978k rebuild thread http://forums.sohc4.net/index.php?topic=68423.0
BIKE OF THE MONTH - OCTOBER 2017
2003 Ducati M800ie
1997 Honda CR-V
2004 Honda CR-V
1966 Honda S90

Offline 754

  • Really Old Timer ...
  • *******
  • Posts: 29,058
Re: This can't be good
« Reply #12 on: July 27, 2009, 08:17:08 AM »
do you get a lot of fog or mist off the ocean, that gets on the bike and collects down there?
Logged
Maker of the WELDLESS 750 Frame Kit
dodogas99@gmail.com
Kelowna B.C.       Canada

My next bike will be a ..ANFOB.....

It's All part of the ADVENTURE...

73 836cc.. Green, had it for 3 decades!!
Lost quite a few CB 750's along the way

Offline SKTP

  • Master
  • *****
  • Posts: 1,792
Re: This can't be good
« Reply #13 on: July 27, 2009, 08:57:27 AM »
Yes, its foggy and overcast almost every morning...
Logged
1978k rebuild thread http://forums.sohc4.net/index.php?topic=68423.0
BIKE OF THE MONTH - OCTOBER 2017
2003 Ducati M800ie
1997 Honda CR-V
2004 Honda CR-V
1966 Honda S90

Altdo

  • Guest
Re: This can't be good
« Reply #14 on: July 27, 2009, 09:03:44 AM »
Bad break man, I've got a frame that you can have.  It's just in New York.  If you can sort out how to get it to the Left Coast, it's yours.
Logged

Offline 754

  • Really Old Timer ...
  • *******
  • Posts: 29,058
Re: This can't be good
« Reply #15 on: July 27, 2009, 09:23:39 AM »
Stkp,
 I would just weld it, got nothing to lose.
 Wirewheel the heck out it first , pick away the rotten thin parts and check the other frame tube.

 Form a flat patch out of 1/16 in steel or slightly thicker(wide enough to reach to clean metal), then curve it to fit the frame as in looking from the side.. you should be able to round it the other way by heating and tacking, unless the hole is too big.

 Nothing to lose, a repaired fram is better than one with holes in it!
Logged
Maker of the WELDLESS 750 Frame Kit
dodogas99@gmail.com
Kelowna B.C.       Canada

My next bike will be a ..ANFOB.....

It's All part of the ADVENTURE...

73 836cc.. Green, had it for 3 decades!!
Lost quite a few CB 750's along the way

Offline SKTP

  • Master
  • *****
  • Posts: 1,792
Re: This can't be good
« Reply #16 on: July 27, 2009, 12:10:19 PM »
Quote from: Altdo on July 27, 2009, 09:03:44 AM
Bad break man, I've got a frame that you can have.  It's just in New York.  If you can sort out how to get it to the Left Coast, it's yours.

Love to see pictures of it...mlinder's too...

I think I am goign to look into a repair or buy a parts bike...the fun never ends!

also...thanks a million for the generous offers and the advise, greatly appreciated  :)
Logged
1978k rebuild thread http://forums.sohc4.net/index.php?topic=68423.0
BIKE OF THE MONTH - OCTOBER 2017
2003 Ducati M800ie
1997 Honda CR-V
2004 Honda CR-V
1966 Honda S90

Offline mlinder

  • "Kitten Puncher"
  • Really Old Timer ...
  • *******
  • Posts: 5,013
  • Stop Global Tilting now!
    • Moto Northwest
Re: This can't be good
« Reply #17 on: July 27, 2009, 01:01:52 PM »
Ah, it's in reasonable shape. Needs a little love, but then again, whioch of these old bikes doesn't? Nothing a bit of time and some satin black paint couldn't fix.
Logged
No.

Offline razor02097

  • Not a fool, just an
  • Expert
  • ****
  • Posts: 767
  • Yes its a Honda You got an F'in problem with that?
Re: This can't be good
« Reply #18 on: July 27, 2009, 02:12:24 PM »
A good welding shop can fix that up but

#1 it would have to be stripped to frame

#2 it may cost as much as getting a used frame.


I guess it all depends on what you think is best and how far you are willing to take it.
Logged
Project Rina

That is an inconceivably egregious transgression against my rudimentary concordance of socially shunned individuals.

Online Don R

  • My Sandcast is a
  • Really Old Timer ...
  • *******
  • Posts: 19,905
  • Saver of unloved motorcycles.
Re: This can't be good
« Reply #19 on: July 27, 2009, 06:33:53 PM »
That looks a lot like my 70 K model. Mine is a long split but in the same area. It looks like the PO liked to jump curbs. I plan to cut a section from another frame and weld it in place using the motor mounts for location. After tacking in the parts with a small tube sleeve inside I will remove the lower 1/2 of the engine, [top already off] and complete the welding. I am also doing the frame tube removal kit I got from Gordon. Mine was already cut there. I am only spending this effort because it is an early serial number. Not very original though. A parts bike is a viable option. They can be had around here for a reasonable price. My thread should be here somewhere, I got some good advice.
Logged
No matter how many times you paint over a shadow, it's still there.
 CEO at the no kill motorcycle shop.
 You don't need a weatherman to know which way the wind blows.

Online Don R

  • My Sandcast is a
  • Really Old Timer ...
  • *******
  • Posts: 19,905
  • Saver of unloved motorcycles.
Re: This can't be good
« Reply #20 on: July 27, 2009, 06:42:34 PM »
Check the K0 frame repair thread and look at the link to the chopper site. there are some diagrams of possible ways to make a weld joint.
Logged
No matter how many times you paint over a shadow, it's still there.
 CEO at the no kill motorcycle shop.
 You don't need a weatherman to know which way the wind blows.

Offline SKTP

  • Master
  • *****
  • Posts: 1,792
Re: This can't be good
« Reply #21 on: July 27, 2009, 10:37:32 PM »
I have a line on a 78F frame...are they much different from the K

If I do swap frames....will I have titling issues (I'm in California)...

has anybody ever shipped a frame? How much money are we talking (ballpark)...

I'm thinking a 78K parts bike might be the way to go...I'm going to look at one for around $700 this week...just when I thought getting my mags on and a dual-disc conversion were my final tasks...OUCH!
Logged
1978k rebuild thread http://forums.sohc4.net/index.php?topic=68423.0
BIKE OF THE MONTH - OCTOBER 2017
2003 Ducati M800ie
1997 Honda CR-V
2004 Honda CR-V
1966 Honda S90

Offline 754

  • Really Old Timer ...
  • *******
  • Posts: 29,058
Re: This can't be good
« Reply #22 on: July 28, 2009, 09:19:47 AM »
&8 F has different seat mounts & kickstand location, than yours.

 usually if you swap frame, you buy one with reggie, register it, then put all your stuff on.

 Lots of Tig welders here could easily weld that  with motori, and pipes off, forks off would help.
Logged
Maker of the WELDLESS 750 Frame Kit
dodogas99@gmail.com
Kelowna B.C.       Canada

My next bike will be a ..ANFOB.....

It's All part of the ADVENTURE...

73 836cc.. Green, had it for 3 decades!!
Lost quite a few CB 750's along the way

Offline SKTP

  • Master
  • *****
  • Posts: 1,792
Re: This can't be good
« Reply #23 on: July 28, 2009, 09:34:12 AM »
Yes, I went to a hotrod builder this morning...he thinks he can weld it up for 2 hundred bucks or so, motor in...he's also goign to check the rest of the frame to see if its safe and still worth fixing...
Logged
1978k rebuild thread http://forums.sohc4.net/index.php?topic=68423.0
BIKE OF THE MONTH - OCTOBER 2017
2003 Ducati M800ie
1997 Honda CR-V
2004 Honda CR-V
1966 Honda S90

Offline SKTP

  • Master
  • *****
  • Posts: 1,792
Re: This can't be good
« Reply #24 on: July 30, 2009, 05:02:58 PM »


Here's where I am at now...
Logged
1978k rebuild thread http://forums.sohc4.net/index.php?topic=68423.0
BIKE OF THE MONTH - OCTOBER 2017
2003 Ducati M800ie
1997 Honda CR-V
2004 Honda CR-V
1966 Honda S90
Pages: [1] 2  All   Go Up
« previous next »