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Offline 754

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Look what the PO did ×%&*@
« on: August 07, 2017, 01:25:40 PM »
This I find now, it's going to have to do  ouch !
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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 MoMo

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Re: Look what the PO did ×%&*@
« Reply #1 on: August 07, 2017, 01:33:46 PM »
Doesn't look like it would harm anything,  is this the motor for the upcoming reunion tour? ...Larry
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Offline Jerry Rxman Griffin aka MuthaF'er

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Re: Look what the PO did ×%&*@
« Reply #2 on: August 07, 2017, 02:11:12 PM »
Wrist pin still turn free?
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As of today 3/13/2012 my original owner 75 CB750F has made it through 3 wives, er EX-wives. Free at last.  ;-)

Offline 754

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Re: Look what the PO did ×%&*@
« Reply #3 on: August 07, 2017, 02:31:42 PM »
Wrist pins turn, they are not dents well one prick punch mark, the rest are die grinder bites.
Finally  figured out the POstory. I knew motor was apart.
Smoked like crazy at first, then settled down a bit but slowly increased. At one point ate the cam.
I fixed that. But now I realize,  it must have been seized real bad. And on 2 and 3, they used a diegrinder to get the piston off the rod. It's the only thing I think that could have done that.
 The guy originally offered it to me as parts, but it had reggie.  Now I know why, I think they gave up !
 I will run it, simply don't care..anymore.. want to get to Colorado.
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 Bankerdanny

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Re: Look what the PO did ×%&*@
« Reply #4 on: August 07, 2017, 02:32:50 PM »
Damn him, building an upside down engine like that. How the heck are you going to fit it in the frame? And chain alignment is going to be a nightmare.
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"The problem with quotes on the Internet is that you never know if they're true" - Abraham Lincoln

Current: '76 CB750F. Previous:  '75 CB550F, 2007 Yamaha Vino 125 Scooter, '75 Harley FXE Superglide, '77 GL1000, '77 CB550k, '68 Suzuki K10 80, '68 Yamaha YR2, '69 BMW R69S, '71 Honda SL175, '02 Royal Enfield Bullet 500, '89 Yamaha FJ1200

Offline 754

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Re: Look what the PO did ×%&*@
« Reply #5 on: August 07, 2017, 02:40:42 PM »
Oh, I am posting from my new tablet, first time for pics.
When I click on them they enlarge right side up.
 What happens when you click on them ?
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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 madmtnmotors

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Re: Look what the PO did ×%&*@
« Reply #6 on: August 07, 2017, 02:52:14 PM »
Should be okay for mild street use. Certainly would not want to race it with those rods!

I wonder where all the grinder debris went?  :o  ;)
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TAMTF...


Wilbur



Projects:
"Evolution": http://forums.sohc4.net/index.php?topic=100352.0
"P.O. Debacle": http://forums.sohc4.net/index.php/topic,126692.msg1441661.html#msg1441661
F2/F3 O-rings: http://forums.sohc4.net/index.php?topic=113672.msg1300721#msg1300721
Cam Tower Studs: https://www.mcmaster.com/#93210a017/=t19sgp
Clean up that nasty harness: http://forums.sohc4.net/index.php?topic=137351.msg1549191#msg1549191
http://forums.sohc4.net/index.php/topic,148188.msg1688494.html#msg1688494
http://forums.sohc4.net/index.php/topic,139544.msg1579364.html#msg1579364
                                          
Charging system diagnosis: http://forums.sohc4.net/index.php?topic=1012.msg8345#msg8345
Get the manuals: http://manuals.sohc4.net/cb750k/
The Dragon: http://forums.sohc4.net/index.php?topic=45183.msg1571675#msg1571675
Headlight Switch: http://forums.sohc4.net/index.php?topic=113986.msg1283236#msg1283236
Branden's leak free top end thread: http://forums.sohc4.net/index.php?topic=107040.0
Engine Lifting Made Easy: http://forums.sohc4.net/index.php/topic,58210.msg1684742.html#msg1684742
                                      http://forums.sohc4.net/index.php/topic,100352.msg1675840.html#msg1675840
Static and Dynamic Timing: http://www.hondachopper.com/garage/carb_info/timing/timing1.html
Airbox Gasket Replacement: http://forums.sohc4.net/index.php/topic,114485.msg1290000.html#msg1290000
"Café" : http://forums.sohc4.net/index.php/topic,84697.msg953814.html#msg953814
PD Carb Choke Linkage: http://forums.sohc4.net/index.php/topic,100352.msg1669248.html#msg1669248
                                    http://forums.sohc4.net/index.php/topic,110931.msg1248354.html#msg1248354
                                    http://forums.sohc4.net/index.php/topic,48858.msg515204.html#msg515204
Follow up on your damn posts: http://forums.sohc4.net/index.php/topic,144305.msg1791605.html#msg1791605
Taiwanese Cam Chain Tensioners:  http://forums.sohc4.net/index.php/topic,155043.msg1774841.html#msg1774841
Gumtwo Seat Cover: http://forums.sohc4.net/index.php/topic,164440.msg1897366.html#msg1897366
Primary Drive: http://forums.sohc4.net/index.php/topic,166063.msg1919278.html#msg1919278
Tank Latch: http://forums.sohc4.net/index.php/topic,165975.msg1919495.html#msg1919495
Shorten your forks: http://vintage-and-classic-honda-s.456789.n3.nabble.com/How-to-shorten-forks-td4042465.html DO NOT CUT THE SPRINGS!
Clutch How To: http://vintage-and-classic-honda-s.456789.n3.nabble.com/How-to-change-and-adjust-a-clutch-SOHC-td4040391.html
Late model K7/K8/F2/F3 front sprocket cover removal: http://forums.sohc4.net/index.php/topic,178428.msg2072279.html#msg2072279
630 to 530 conversion: http://forums.sohc4.net/index.php/topic,180710.msg2094423.html#msg2094423

Sent from my Tandy TRS-80!

Offline MetroRedneck

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Re: Look what the PO did ×%&*@
« Reply #7 on: August 07, 2017, 02:53:23 PM »
Pics are right side up when opened.

Looks like he made a custom squirt hole cooling mod.
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Offline Stev-o

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Re: Look what the PO did ×%&*@
« Reply #8 on: August 07, 2017, 03:28:45 PM »
Dont worry, you wont see it once buttoned up!
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'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Offline madmtnmotors

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Re: Look what the PO did ×%&*@
« Reply #9 on: August 07, 2017, 03:42:59 PM »
Quote from: Stev-o on August 07, 2017, 03:28:45 PM
Dont worry, you wont see it once buttoned up!

Unless it decides to create a new "window"...  :o  ;)
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TAMTF...


Wilbur



Projects:
"Evolution": http://forums.sohc4.net/index.php?topic=100352.0
"P.O. Debacle": http://forums.sohc4.net/index.php/topic,126692.msg1441661.html#msg1441661
F2/F3 O-rings: http://forums.sohc4.net/index.php?topic=113672.msg1300721#msg1300721
Cam Tower Studs: https://www.mcmaster.com/#93210a017/=t19sgp
Clean up that nasty harness: http://forums.sohc4.net/index.php?topic=137351.msg1549191#msg1549191
http://forums.sohc4.net/index.php/topic,148188.msg1688494.html#msg1688494
http://forums.sohc4.net/index.php/topic,139544.msg1579364.html#msg1579364
                                          
Charging system diagnosis: http://forums.sohc4.net/index.php?topic=1012.msg8345#msg8345
Get the manuals: http://manuals.sohc4.net/cb750k/
The Dragon: http://forums.sohc4.net/index.php?topic=45183.msg1571675#msg1571675
Headlight Switch: http://forums.sohc4.net/index.php?topic=113986.msg1283236#msg1283236
Branden's leak free top end thread: http://forums.sohc4.net/index.php?topic=107040.0
Engine Lifting Made Easy: http://forums.sohc4.net/index.php/topic,58210.msg1684742.html#msg1684742
                                      http://forums.sohc4.net/index.php/topic,100352.msg1675840.html#msg1675840
Static and Dynamic Timing: http://www.hondachopper.com/garage/carb_info/timing/timing1.html
Airbox Gasket Replacement: http://forums.sohc4.net/index.php/topic,114485.msg1290000.html#msg1290000
"Café" : http://forums.sohc4.net/index.php/topic,84697.msg953814.html#msg953814
PD Carb Choke Linkage: http://forums.sohc4.net/index.php/topic,100352.msg1669248.html#msg1669248
                                    http://forums.sohc4.net/index.php/topic,110931.msg1248354.html#msg1248354
                                    http://forums.sohc4.net/index.php/topic,48858.msg515204.html#msg515204
Follow up on your damn posts: http://forums.sohc4.net/index.php/topic,144305.msg1791605.html#msg1791605
Taiwanese Cam Chain Tensioners:  http://forums.sohc4.net/index.php/topic,155043.msg1774841.html#msg1774841
Gumtwo Seat Cover: http://forums.sohc4.net/index.php/topic,164440.msg1897366.html#msg1897366
Primary Drive: http://forums.sohc4.net/index.php/topic,166063.msg1919278.html#msg1919278
Tank Latch: http://forums.sohc4.net/index.php/topic,165975.msg1919495.html#msg1919495
Shorten your forks: http://vintage-and-classic-honda-s.456789.n3.nabble.com/How-to-shorten-forks-td4042465.html DO NOT CUT THE SPRINGS!
Clutch How To: http://vintage-and-classic-honda-s.456789.n3.nabble.com/How-to-change-and-adjust-a-clutch-SOHC-td4040391.html
Late model K7/K8/F2/F3 front sprocket cover removal: http://forums.sohc4.net/index.php/topic,178428.msg2072279.html#msg2072279
630 to 530 conversion: http://forums.sohc4.net/index.php/topic,180710.msg2094423.html#msg2094423

Sent from my Tandy TRS-80!

Offline Stev-o

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Re: Look what the PO did ×%&*@
« Reply #10 on: August 07, 2017, 03:58:49 PM »
Quote from: madmtnmotors on August 07, 2017, 03:42:59 PM
Quote from: Stev-o on August 07, 2017, 03:28:45 PM
Dont worry, you wont see it once buttoned up!

Unless it decides to create a new "window"...  :o  ;)

You mean similar to the "window" in my K4, Wilbur?!



Logged
'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Offline 754

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Re: Look what the PO did ×%&*@
« Reply #11 on: August 07, 2017, 04:21:05 PM »
Not helping, ,  scaring me   It will be high compression stock bore. RD 315 cam, Webers I hope 
Be  tempting to wring it out,  after Dolores.
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 gschuld

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Re: Look what the PO did ×%&*@
« Reply #12 on: August 07, 2017, 04:50:51 PM »
Quote from: Stev-o on August 07, 2017, 03:58:49 PM
Quote from: madmtnmotors on August 07, 2017, 03:42:59 PM
Quote from: Stev-o on August 07, 2017, 03:28:45 PM
Dont worry, you wont see it once buttoned up!

Unless it decides to create a new "window"...  :o  ;)

You mean similar to the "window" in my K4, Wilbur?!








Someone should start an engine carnage photo thread...that is a good opening salvo ;)

I've got some pics...we know Billy has some   :o (...running and ducking)

George
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Offline Jerry Rxman Griffin aka MuthaF'er

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Re: Look what the PO did ×%&*@
« Reply #13 on: August 07, 2017, 05:08:10 PM »
Quote from: 754 on August 07, 2017, 02:31:42 PM
Wrist pins turn, they are not dents well one prick punch mark, the rest are die grinder bites.
Finally  figured out the POstory. I knew motor was apart.
Smoked like crazy at first, then settled down a bit but slowly increased. At one point ate the cam.
I fixed that. But now I realize,  it must have been seized real bad. And on 2 and 3, they used a diegrinder to get the piston off the rod. It's the only thing I think that could have done that.
 The guy originally offered it to me as parts, but it had reggie.  Now I know why, I think they gave up !
 I will run it, simply don't care..anymore.. want to get to Colorado.

If those pistons were so hard to get off you'd expect galling of the rod little ends??
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As of today 3/13/2012 my original owner 75 CB750F has made it through 3 wives, er EX-wives. Free at last.  ;-)

Offline BPellerine

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Re: Look what the PO did ×%&*@
« Reply #14 on: August 07, 2017, 05:22:55 PM »
Frank,maybe you could smooth off the sharp edges,might help a little bit,at least you got hd studs,if anyone will make it to colorado it will be you!haha bill
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1978 CB 750K ard and webers
another anfob

Offline madmtnmotors

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Re: Look what the PO did ×%&*@
« Reply #15 on: August 07, 2017, 05:29:11 PM »
Quote from: Stev-o on August 07, 2017, 03:58:49 PM
Quote from: madmtnmotors on August 07, 2017, 03:42:59 PM
Quote from: Stev-o on August 07, 2017, 03:28:45 PM
Dont worry, you wont see it once buttoned up!

Unless it decides to create a new "window"...  :o  ;)

You mean similar to the "window" in my K4, Wilbur?!


Yup!


Quote from: BPellerine on August 07, 2017, 05:22:55 PM
Frank,maybe you could smooth off the sharp edges,might help a little bit

I was thinking the same thing. Sharp edges are often the point of failure.


Quote from: 754 on August 07, 2017, 04:21:05 PM
Not helping, ,  scaring me   It will be high compression stock bore. RD 315 cam, Webers I hope 
Be  tempting to wring it out,  after Dolores.

Damn the torpedo's! Full speed ahead! Seriously though, these old Hondas were overbuilt, so there is a little "wiggle room" built in. Just playing the devil's advocate!  ;)

I'm drag racing a low compression 836cc (flat tops) that regularly mostly sees 9200 to 9500 rpms with stock rods. So far so good!  8)
« Last Edit: August 07, 2017, 05:31:47 PM by madmtnmotors »
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TAMTF...


Wilbur



Projects:
"Evolution": http://forums.sohc4.net/index.php?topic=100352.0
"P.O. Debacle": http://forums.sohc4.net/index.php/topic,126692.msg1441661.html#msg1441661
F2/F3 O-rings: http://forums.sohc4.net/index.php?topic=113672.msg1300721#msg1300721
Cam Tower Studs: https://www.mcmaster.com/#93210a017/=t19sgp
Clean up that nasty harness: http://forums.sohc4.net/index.php?topic=137351.msg1549191#msg1549191
http://forums.sohc4.net/index.php/topic,148188.msg1688494.html#msg1688494
http://forums.sohc4.net/index.php/topic,139544.msg1579364.html#msg1579364
                                          
Charging system diagnosis: http://forums.sohc4.net/index.php?topic=1012.msg8345#msg8345
Get the manuals: http://manuals.sohc4.net/cb750k/
The Dragon: http://forums.sohc4.net/index.php?topic=45183.msg1571675#msg1571675
Headlight Switch: http://forums.sohc4.net/index.php?topic=113986.msg1283236#msg1283236
Branden's leak free top end thread: http://forums.sohc4.net/index.php?topic=107040.0
Engine Lifting Made Easy: http://forums.sohc4.net/index.php/topic,58210.msg1684742.html#msg1684742
                                      http://forums.sohc4.net/index.php/topic,100352.msg1675840.html#msg1675840
Static and Dynamic Timing: http://www.hondachopper.com/garage/carb_info/timing/timing1.html
Airbox Gasket Replacement: http://forums.sohc4.net/index.php/topic,114485.msg1290000.html#msg1290000
"Café" : http://forums.sohc4.net/index.php/topic,84697.msg953814.html#msg953814
PD Carb Choke Linkage: http://forums.sohc4.net/index.php/topic,100352.msg1669248.html#msg1669248
                                    http://forums.sohc4.net/index.php/topic,110931.msg1248354.html#msg1248354
                                    http://forums.sohc4.net/index.php/topic,48858.msg515204.html#msg515204
Follow up on your damn posts: http://forums.sohc4.net/index.php/topic,144305.msg1791605.html#msg1791605
Taiwanese Cam Chain Tensioners:  http://forums.sohc4.net/index.php/topic,155043.msg1774841.html#msg1774841
Gumtwo Seat Cover: http://forums.sohc4.net/index.php/topic,164440.msg1897366.html#msg1897366
Primary Drive: http://forums.sohc4.net/index.php/topic,166063.msg1919278.html#msg1919278
Tank Latch: http://forums.sohc4.net/index.php/topic,165975.msg1919495.html#msg1919495
Shorten your forks: http://vintage-and-classic-honda-s.456789.n3.nabble.com/How-to-shorten-forks-td4042465.html DO NOT CUT THE SPRINGS!
Clutch How To: http://vintage-and-classic-honda-s.456789.n3.nabble.com/How-to-change-and-adjust-a-clutch-SOHC-td4040391.html
Late model K7/K8/F2/F3 front sprocket cover removal: http://forums.sohc4.net/index.php/topic,178428.msg2072279.html#msg2072279
630 to 530 conversion: http://forums.sohc4.net/index.php/topic,180710.msg2094423.html#msg2094423

Sent from my Tandy TRS-80!

Offline 754

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Re: Look what the PO did ×%&*@
« Reply #16 on: August 07, 2017, 07:26:16 PM »
Bill  I never had HD studs neither does this.
My 836 that I ran on and off plus raced a lot had stock rods and cast piston  (think they were RC,s).

 This one was not stuck while I had it, but I knew they were inside it, and they offered it as parts, and I suggested trying to run it, and I did 2 seasons.
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 Stev-o

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Re: Look what the PO did ×%&*@
« Reply #17 on: August 07, 2017, 07:59:56 PM »
Quote from: gschuld on August 07, 2017, 04:50:51 PM
Quote from: Stev-o on August 07, 2017, 03:58:49 PM
Quote from: madmtnmotors on August 07, 2017, 03:42:59 PM
Quote from: Stev-o on August 07, 2017, 03:28:45 PM
Dont worry, you wont see it once buttoned up!

Unless it decides to create a new "window"...  :o  ;)

You mean similar to the "window" in my K4, Wilbur?!








Someone should start an engine carnage photo thread...that is a good opening salvo ;)



Good idea! 
Logged
'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Offline scottly

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Re: Look what the PO did ×%&*@
« Reply #18 on: August 07, 2017, 08:00:57 PM »
At this late date it might be time to start thinking about the plan "B" motor??
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Don't fix it if it ain't broke!
Helmets save brains. Always wear one and ride like everyone is trying to kill you....

Offline BPellerine

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Re: Look what the PO did ×%&*@
« Reply #19 on: August 08, 2017, 05:03:36 AM »
Quote from: 754 on August 07, 2017, 07:26:16 PM
Bill  I never had HD studs neither does this.
My 836 that I ran on and off plus raced a lot had stock rods and cast piston  (think they were RC,s).

 This one was not stuck while I had it, but I knew they were inside it, and they offered it as parts, and I suggested trying to run it, and I did 2 seasons.
the pic kind of fooled me,I see now,hope it works out.bill
Logged
1978 CB 750K ard and webers
another anfob
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