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Online BenelliSEI

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Sunday Quiz II
« on: February 09, 2020, 11:28:49 AM »
This part is only used for one model year of cb750K. What is it? What year? Why?
« Last Edit: February 09, 2020, 11:53:19 AM by BenelliSEI »
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Online BenelliSEI

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Re: Sunday Quiz II
« Reply #1 on: February 09, 2020, 12:03:13 PM »
Clue: Not hidden away. Easily seen.
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Online jaytee-nz

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Re: Sunday Quiz II
« Reply #2 on: February 09, 2020, 12:16:14 PM »
The infamous detachable engine mount bracket for that year ?
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Online BenelliSEI

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Re: Sunday Quiz II
« Reply #3 on: February 09, 2020, 12:18:16 PM »
Correct answer to the first question!......... two more questions?

P.S. I have no clue “why?”, curious if anyone even has a theory?!
« Last Edit: February 09, 2020, 12:20:18 PM by BenelliSEI »
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Offline Stev-o

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Re: Sunday Quiz II
« Reply #4 on: February 09, 2020, 12:36:30 PM »
Quote from: BenelliSEI on February 09, 2020, 12:18:16 PM
Correct answer to the first question!......... two more questions?

P.S. I have no clue “why?”, curious if anyone even has a theory?!

That is a question for the ages!   Hondaman??
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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: Sunday Quiz II
« Reply #5 on: February 09, 2020, 01:23:10 PM »
I believe it was the 77' K model front left motor mount. As for why... why not?  ;D
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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!

Online BenelliSEI

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Re: Sunday Quiz II
« Reply #6 on: February 09, 2020, 02:29:41 PM »
Madmtnmotors........ Correct! Both questions. Why would Honda make that upper front motor mount a removable bracket ONLY in 1977?? In 1978, they reverted to the solid lug. There must be a reason? 
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Offline madmtnmotors

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Re: Sunday Quiz II
« Reply #7 on: February 09, 2020, 04:04:45 PM »
Quote from: BenelliSEI on February 09, 2020, 02:29:41 PM
There must be a reason?

Maybe they were just checking to see if we were paying attention!  ;)
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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 kerryb

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Re: Sunday Quiz II
« Reply #8 on: February 09, 2020, 04:32:33 PM »
Changes like that are usually related to production costs and tme studies.  The removable engine mount was maybe tried to reduce cost/time of frame production, but it was found to be more costly in in terms of labor time to install and production costs to produce two stampings verses one lug.
Just guessing.
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intrigued by the wail...seduced by the scream.

Online BenelliSEI

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Re: Sunday Quiz II
« Reply #9 on: February 09, 2020, 04:57:11 PM »
Kerry......that’s the best guess by far. Still very weird. So few changes by Honda ever reverted back to the original version..........
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Online BenelliSEI

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Re: Sunday Quiz II
« Reply #10 on: February 09, 2020, 04:58:51 PM »
I wonder if this is engine  mount was planned for the ‘77 cb750A?? And then scrapped?
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Offline jlh3rd

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Re: Sunday Quiz II
« Reply #11 on: February 09, 2020, 06:24:30 PM »
this was a discussion awhile back. The even weirder thing is that the part cant be ordered,its not in the parts fiche. The frame picture has the welded bracket
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Offline seanbarney41

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Re: Sunday Quiz II
« Reply #12 on: February 09, 2020, 06:31:14 PM »
My guess is a parts shortage...but really, there are probably dozens of these kind of parts change anomalies and I still don't care much for or about the K7's.
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If it works good, it looks good...
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