Author Topic: 72 CB750 K2 titled frame. Is this thing useable as a hard tail frame?  (Read 10088 times)

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Offline thrutheframe

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   I've been talking to a guy about buying a lot of parts, part of which includes the frame seen below.  I'm thinking frame kit but did he cut the side tubes and the middle gusset in the correct places?
  Can someone post some pics or direct me to pics of a frame kit so I know if this frame is useable before I go look at it?
« Last Edit: March 06, 2012, 04:43:41 PM by thrutheframe »
'74 cb 750 K4
'79 CB 650 http://forums.sohc4.net/index.php?topic=83981.0
'75 CB 360T
'90 RC31 Hawk GT

Offline Rigid

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That is a common butcher job to do head work without removing the engine.  It is easy to repair with a removeable section, or as I do, by welding the tubes back in. 
36 years of this stuff, here to help.

nomad

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I'd say yes.  I believe the frame is cut a smidge short in the rear near the seat, but I don't see why it couldn't be made to work with one of Gordon's frame kits.  Hell, some people cut the neck off of bikes to weld onto other frames simply because the "neck" is titled.  If either you or your mechanic has decent welding skills, I would buy it.  The backbone is intact.  As long as he hasn't tweaked it by some hard riding without the side bars, it should be fine.  Make the guy selling it give you a GREAT deal on it though.  Stress how much it'll cost to get it professionally repaired.   ;D

Offline madmtnmotors

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It is easy to repair by welding the tubes back in. 

+
TAMTF...


Wilbur



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Offline Don R

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I cut the same center tubes  from a wrecked F model and welded it into a K0. That tells me any sohc 750 frame has the correct center section. I even moved the triangle brace because it was gone too. Go for it.
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Offline grcamna2

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I'd say yes.  I believe the frame is cut a smidge short in the rear near the seat, but I don't see why it couldn't be made to work with one of Gordon's frame kits.  Hell, some people cut the neck off of bikes to weld onto other frames simply because the "neck" is titled.  If either you or your mechanic has decent welding skills, I would buy it.  The backbone is intact.  As long as he hasn't tweaked it by some hard riding without the side bars, it should be fine.  Make the guy selling it give you a GREAT deal on it though.  Stress how much it'll cost to get it professionally repaired.   ;D
+1
75' CB400F/'bunch o' parts' & 81' CB125S modded to a 'CB200S'
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Offline thrutheframe

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I'd say yes.  I believe the frame is cut a smidge short in the rear near the seat, but I don't see why it couldn't be made to work with one of Gordon's frame kits.  Hell, some people cut the neck off of bikes to weld onto other frames simply because the "neck" is titled.  If either you or your mechanic has decent welding skills, I would buy it.  The backbone is intact.  As long as he hasn't tweaked it by some hard riding without the side bars, it should be fine.  Make the guy selling it give you a GREAT deal on it though.  Stress how much it'll cost to get it professionally repaired.   ;D

A "good" K2 engine (SN to follow) two frames... the one pictured, and a "hard tailed" frame. The gold frame is titled (wrong the title is for the cut frame). Two seats, two swing arms, a K2 tank, oil tank, the triple tree, forks, three wheels, a set of "mikuni carbs" and all the odd and ends "in a Yugoslavian beer case"...

$350.00

Haven't seen it looking at the lot Wednesday.
« Last Edit: March 06, 2012, 07:10:52 AM by thrutheframe »
'74 cb 750 K4
'79 CB 650 http://forums.sohc4.net/index.php?topic=83981.0
'75 CB 360T
'90 RC31 Hawk GT

Offline thrutheframe

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  • did you bleed when you built that?
Oh and I don't think he's ridden it with it cut.
'74 cb 750 K4
'79 CB 650 http://forums.sohc4.net/index.php?topic=83981.0
'75 CB 360T
'90 RC31 Hawk GT

Offline 754

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 Buy IT !!! I have ridden a hopped up one cut with 6 over forx 1000mile s 2up in 2 days... no biggie..

If it is cut too short we could custom make a kit for it to take up the difference...
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 thrutheframe

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  • did you bleed when you built that?
Buy IT !!! I have ridden a hopped up one cut with 6 over forx 1000mile s 2up in 2 days... no biggie..

If it is cut too short we could custom make a kit for it to take up the difference...

754, your eyes freak me out.  Your advice makes glad I commited to buy it all sight unseen.
'74 cb 750 K4
'79 CB 650 http://forums.sohc4.net/index.php?topic=83981.0
'75 CB 360T
'90 RC31 Hawk GT

Offline 754

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 That is a K1 tank in the pic, I bet..faded Candy Garnet Brown..
 My eyesalook better now and the kids are gertting over me blinding Ted E. bear, and parting him out...
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 thrutheframe

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  • did you bleed when you built that?
Poor Ted E
'74 cb 750 K4
'79 CB 650 http://forums.sohc4.net/index.php?topic=83981.0
'75 CB 360T
'90 RC31 Hawk GT

Offline Pecantree

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Do you have to tilt your head left and right to see left and right? :o
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Offline thrutheframe

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  • did you bleed when you built that?
My buddy is coming at 8 in the AM to take me to pick the stuff up.
'74 cb 750 K4
'79 CB 650 http://forums.sohc4.net/index.php?topic=83981.0
'75 CB 360T
'90 RC31 Hawk GT

Offline myhondas

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Back in 75, I had the frame cut by the Stealer Shop I was using. I rode it with the frame cut for over 5 years without any problems. That was before the Gordon Kit existed. But as stated earlier, It can be repaired without major problems.
1974 CB 750 K4 SHOWROOM
1974 CB 750 K4 IN PART-OUT PROCESS (my original bike)
1965 C100 CUB 50 (PIT BIKE)
1996 VF 750 CD daily rider
1983 VF 1100 V65 Magna in restoration process
SOHC# 5105 11228

Offline kck3

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The tank is a K1-looks valley green to me.

Offline thrutheframe

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I'll try to post some proper pics tomorrow once I get back with the stuff.
'74 cb 750 K4
'79 CB 650 http://forums.sohc4.net/index.php?topic=83981.0
'75 CB 360T
'90 RC31 Hawk GT

Offline 754

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 I bet Candy Garnet Brown..we should have a poll... lol..
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 ekpent

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I bet Candy Garnet Brown..we should have a poll... lol..
Good 'Eye' there Frank on the tank. The old Candy Brown 71 that has sun faded to the green base on top.

Offline Gordon

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I bet Candy Garnet Brown..we should have a poll... lol..

My vote is for Valley Green.  The color looks too even on the top to be caused by fading, and I think the darker-looking side is just a factor of the lighting and low quality image. 

Offline thrutheframe

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I bet Candy Garnet Brown..we should have a poll... lol..
Good 'Eye' there Frank on the tank. The old Candy Brown 71 that has sun faded to the green base on top.

We have a winner. Candy Brown is correct.

'74 cb 750 K4
'79 CB 650 http://forums.sohc4.net/index.php?topic=83981.0
'75 CB 360T
'90 RC31 Hawk GT

Offline thrutheframe

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Can anyone tell me what year this engine is?
'74 cb 750 K4
'79 CB 650 http://forums.sohc4.net/index.php?topic=83981.0
'75 CB 360T
'90 RC31 Hawk GT

Offline grachman

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Offline thrutheframe

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  A few more pics of the basket case.
'74 cb 750 K4
'79 CB 650 http://forums.sohc4.net/index.php?topic=83981.0
'75 CB 360T
'90 RC31 Hawk GT

Offline thrutheframe

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  So it looks like the engine is a K3 and the frame is a K1... The yellow frame has no title.  Theres another titled frame that has been cut on pretty badly. Tha VIN is CB750 1101136.  It is titled as a 72, but the VIN chart provided by grachman makes it a K1. 
« Last Edit: February 15, 2012, 02:58:46 PM by thrutheframe »
'74 cb 750 K4
'79 CB 650 http://forums.sohc4.net/index.php?topic=83981.0
'75 CB 360T
'90 RC31 Hawk GT