Author Topic: Is this weldable?  (Read 1629 times)

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Offline IanP19

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Is this weldable?
« on: August 21, 2015, 01:47:40 PM »
Hi Guys,

Do you think this is weldable? Can't see why not but more worried about having to strip the whole thing down.

Hopefully you can see what I mean!



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« Last Edit: August 21, 2015, 01:49:47 PM by ianpond19 »

Offline 70CB750

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Re: Is this weldable?
« Reply #1 on: August 21, 2015, 01:49:22 PM »
I dont see it, whats broken?
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Offline IanP19

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Re: Is this weldable?
« Reply #2 on: August 21, 2015, 02:10:15 PM »
I dont see it, whats broken?
Thought that might be the case, just above where the oil pan meets the lower (right hand edge). If that makes sense?



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« Last Edit: August 21, 2015, 02:20:37 PM by ianpond19 »

Offline Stev-o

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Re: Is this weldable?
« Reply #3 on: August 21, 2015, 02:47:40 PM »
I dont see it, whats broken?
Thought that might be the case, just above where the oil pan meets the lower (right hand edge). If that makes sense?



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Offline scunny

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Re: Is this weldable?
« Reply #4 on: August 21, 2015, 03:09:42 PM »
looks like a casting mark, sure it's cracked ?
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Offline scottly

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Re: Is this weldable?
« Reply #5 on: August 21, 2015, 06:13:48 PM »
I agree it looks like a casting mark. I seem to recall others worried about the same thing? Ian, I would be more concerned with the condition of the drive chain, as yours appears to be somewhat rusty and crusty. Welcome to the fun. :D
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Offline ekpent

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Re: Is this weldable?
« Reply #6 on: August 21, 2015, 07:19:26 PM »
Reply #11141  may relate to your situation. Is that a 550 ?  http://forums.sohc4.net/index.php/topic,61168.msg1230107.html#msg1230107

Offline Bootsey

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Re: Is this weldable?
« Reply #7 on: August 21, 2015, 10:00:20 PM »
+1 to casting mark.

Offline IanP19

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Re: Is this weldable?
« Reply #8 on: August 22, 2015, 02:08:38 AM »
Cheers guys, only had the bike a few months. Bought it as a project and only just got round to looking at it.
Thought it might be the source of the oil leak.

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Online PeWe

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Re: Is this weldable?
« Reply #9 on: August 22, 2015, 02:33:35 AM »
There are tons of good information on these forums about stuff like this. The search function will usually not give any good results when searching.

Use Google in another browser tab and search for what you need information about + Sohc forum. Then you'll find
« Last Edit: August 22, 2015, 12:10:40 PM by PeWe »
CB750 K6-76  970cc (Earlier 1005cc JMR Billet block on the shelf waiting for a comeback)
CB750 K2-75 Parts assembled to a stock K2

Updates of the CB750 K6 -1976
http://forums.sohc4.net/index.php/topic,180468.msg2092136.html#msg2092136
The billet block build thread
http://forums.sohc4.net/index.php/topic,49438.msg1863571.html#msg1863571
CB750 K2 -1975  build thread
http://forums.sohc4.net/index.php/topic,168243.msg1948381.html#msg1948381
K2 engine build thread. For a complete CB750 -75
http://forums.sohc4.net/index.php/topic,180088.msg2088008.html#msg2088008
Carb jetting, a long story Mikuni TMR32
http://forums.sohc4.net/index.php/topic,179479.msg2104967.html#msg2104967

Offline DaveBarbier

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Re: Is this weldable?
« Reply #10 on: August 22, 2015, 04:21:36 AM »
+2 (or whatever number we're up to) Casting mark and nothing to fear. It IS a weird casting mark though.

Offline Lostboy Steve

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Re: Is this weldable?
« Reply #11 on: August 22, 2015, 05:16:48 AM »
That exact mark scared the #$%* out of me at first as well.
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Offline IanP19

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Re: Is this weldable?
« Reply #12 on: August 22, 2015, 12:23:39 PM »
Phewww - Least I'm not the only one


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