Author Topic: 1968 CB750 Example  (Read 2760 times)

0 Members and 1 Guest are viewing this topic.

Offline jakec

  • Master
  • *****
  • Posts: 2,066
1968 CB750 Example
« on: May 05, 2024, 11:28:42 am »
Has anyone seen more information on this bike? It's not on the Vic World website. I found it randomly on instagram today.

https://www.instagram.com/p/C6j5CM0ShU-/?utm_source=ig_web_copy_link&igsh=MzRlODBiNWFlZA==

1970 CB750 K0
1970 CL350 K2
1975 CB400 F0
1977 CB750 Chop

Offline jakec

  • Master
  • *****
  • Posts: 2,066
Re: 1968 CB750 Example
« Reply #1 on: May 05, 2024, 12:21:52 pm »
1970 CB750 K0
1970 CL350 K2
1975 CB400 F0
1977 CB750 Chop

Online 69cb750

  • Expert
  • ****
  • Posts: 1,198
Re: 1968 CB750 Example
« Reply #2 on: May 05, 2024, 12:28:56 pm »
Early prototype, non production alternator cover, carbs, air cleaner, side cover.

Offline Kevin

  • Hot Shot
  • ***
  • Posts: 500
Re: 1968 CB750 Example
« Reply #3 on: May 05, 2024, 02:00:58 pm »
I think this is it:
https://www.motorcyclistonline.com/news/honda-cb750-sandcast-prototype/

Sent from my SM-S908U1 using Tapatalk

A couple of 400F's and a
'98 Suzuki Intruder VS1400 ~ for long rides

Offline grcamna2

  • Not a
  • Really Old Timer ...
  • *******
  • Posts: 14,899
  • I love to restore & travel. Keep'em Going Strong !
Re: 1968 CB750 Example
« Reply #4 on: May 05, 2024, 02:17:59 pm »
Following
75' CB400F/'bunch o' parts' & 81' CB125S modded to a 'CB200S'
  I love the small ones too !
Do your BEST...nobody can take that away from you.

Online 69cb750

  • Expert
  • ****
  • Posts: 1,198
Re: 1968 CB750 Example
« Reply #5 on: May 05, 2024, 02:29:10 pm »
2110 gold
2111 red
2112 dark green
2113 blue-green Vic World
2113 has production alternator cover, carbs, air cleaner, side covers.

These photos are an earlier prototype, like the November 68 prototype at the Toyko motor show.

Offline jakec

  • Master
  • *****
  • Posts: 2,066
Re: 1968 CB750 Example
« Reply #6 on: May 05, 2024, 10:23:28 pm »
Kevin, even though the article seems to describe the bike the photos don’t. Kinda of odd? All of the prototype details in the pics I provided from this past weekend are not on the pics in the article you linked.
1970 CB750 K0
1970 CL350 K2
1975 CB400 F0
1977 CB750 Chop

Online 69cb750

  • Expert
  • ****
  • Posts: 1,198
Re: 1968 CB750 Example
« Reply #7 on: May 06, 2024, 05:13:04 am »
Quote
Kevin, even though the article seems to describe the bike the photos don’t. Kinda of odd? All of the prototype details in the pics I provided from this past weekend are not on the pics in the article you linked.
The photos Kevin posted is 2113.
The photos you posted is an earlier prototype.

Offline jwurbel

  • Enthusiast
  • **
  • Posts: 174
Re: 1968 CB750 Example
« Reply #8 on: May 06, 2024, 08:22:11 pm »
Looking at the right handle bar.  Push pull set up on the prototype?  Yet sandcast release used a single cable.
Maybe I am confusing the two different pictures.
.

Offline willbird

  • Expert
  • ****
  • Posts: 903
Re: 1968 CB750 Example
« Reply #9 on: May 07, 2024, 04:23:02 am »
Looking at the right handle bar.  Push pull set up on the prototype?  Yet sandcast release used a single cable.
Maybe I am confusing the two different pictures.
.

I think there are pictures of two different bikes kind of the same color.

https://www.motorcyclistonline.com/resizer/UFlSPQW46mH4XkqwuZ9E9zW6xZI=/968x645/smart/cloudfront-us-east-1.images.arcpublishing.com/octane/JRWTTWZG4EN53OPLELWQN7QRNE.jpg

Offline CycleRanger

  • No comment about being an
  • Really Old Timer ...
  • *******
  • Posts: 5,365
  • Central Texas Shop Manual Advocate
Re: 1968 CB750 Example
« Reply #10 on: May 07, 2024, 05:33:10 am »
There's some more images of early 750's in this thread.
http://forums.sohc4.net/index.php/topic,194544.0.html
Do you have a copy of the Honda Shop Manual or Parts List for your bike? Get one here:
https://www.honda4fun.com/materiale/documentazione-tecnica
CB750K5        '79 XL250s     CL350K3
CB750K3        '76 XS650      '76 CJ360T

Offline Ujeni

  • Enthusiast
  • **
  • Posts: 224
Re: 1968 CB750 Example
« Reply #11 on: May 07, 2024, 07:35:24 pm »
Lots of info about this bike can be found here.

https://www.cb750prototype.com/

I actually helped in its restoration! An amazing piece of history.
Ujeni Motors
Sandcast #410
Sandcast #538 Watch the restoration!
Sandcast #6592 All original daily driver.

Online newday777

  • Really Old Timer ...
  • *******
  • Posts: 5,030
  • Avatar is my 76 K6 in Colorado w/Cody on back 1980
Re: 1968 CB750 Example
« Reply #12 on: May 08, 2024, 04:12:28 am »
Lots of info about this bike can be found here.

https://www.cb750prototype.com/

I actually helped in its restoration! An amazing piece of history.

Very cool reading. Thanks for sharing it Sam.
Stu
Honda Parts manager in the mid 1970s Nashua Honda
My current rides
1975 K5 Planet Blue my summer ride, it was a friend's bike I worked with at the Honda shop in 76, lots of fun to be on it again
1976 K6 Anteres Red rebuilding project, was originally my brother's that I set up from the crate, it'll breath again soon!
Project 750s, 2 K4, 2 K6, 1 K8
2008 GL1800 my daily ride and cross country runner

Prior bikes....
1972 Suzuki GT380 I had charge of it for a year in 1973 while my friend was deployed and learned to love street riding....
New CB450 K7 after my friend returned...
New CB750 K5 Planet Blue, demise by ex cousin in law at 9,000 miles...
New CB750 K6 Anteres Red, to replace the totaled K5, I sold this K6 at 45k in 1983, I had heavily modified it, many great memories on it and have missed it greatly.....
1983 GL1100A, 1999 GL1500 SE, 1999 GL1500A

Online newday777

  • Really Old Timer ...
  • *******
  • Posts: 5,030
  • Avatar is my 76 K6 in Colorado w/Cody on back 1980
Re: 1968 CB750 Example
« Reply #13 on: May 08, 2024, 04:15:02 am »
Early prototype, non production alternator cover, carbs, air cleaner, side cover.
And lots more too!
A lot of very unique parts
Stu
Honda Parts manager in the mid 1970s Nashua Honda
My current rides
1975 K5 Planet Blue my summer ride, it was a friend's bike I worked with at the Honda shop in 76, lots of fun to be on it again
1976 K6 Anteres Red rebuilding project, was originally my brother's that I set up from the crate, it'll breath again soon!
Project 750s, 2 K4, 2 K6, 1 K8
2008 GL1800 my daily ride and cross country runner

Prior bikes....
1972 Suzuki GT380 I had charge of it for a year in 1973 while my friend was deployed and learned to love street riding....
New CB450 K7 after my friend returned...
New CB750 K5 Planet Blue, demise by ex cousin in law at 9,000 miles...
New CB750 K6 Anteres Red, to replace the totaled K5, I sold this K6 at 45k in 1983, I had heavily modified it, many great memories on it and have missed it greatly.....
1983 GL1100A, 1999 GL1500 SE, 1999 GL1500A

Online 69cb750

  • Expert
  • ****
  • Posts: 1,198
Re: 1968 CB750 Example
« Reply #14 on: May 08, 2024, 06:16:39 am »
Quote
Lots of info about this bike can be found here.
https://www.cb750prototype.com/
I actually helped in its restoration! An amazing piece of history.

Sam,
Are you free to tell the story how Vic got it and what will happen with the bike ?


Offline Stev-o

  • Ain't no
  • Really Old Timer ...
  • *******
  • Posts: 34,143
  • Central Texas
Re: 1968 CB750 Example
« Reply #15 on: May 08, 2024, 07:14:13 am »
Lots of info about this bike can be found here.

https://www.cb750prototype.com/

I actually helped in its restoration! An amazing piece of history.

So much interesting info there, amazing how many changes were made for whatever reason.

Thanks for sharing.

Admin - can you pin the website link?  Thx
'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Offline MauiK3

  • A K3 is saved
  • Old Timer
  • ******
  • Posts: 4,198
  • Old guy
Re: 1968 CB750 Example
« Reply #16 on: May 08, 2024, 08:07:45 am »
I thought Vic World had it several years ago and sold it for around $250k with the original rubber on the tires.
I seem to remember an article about the sale.
1973 CB 750 K3
10/72 build Z1 Kawasaki

Offline JamesH

  • Enthusiast
  • **
  • Posts: 249
Re: 1968 CB750 Example
« Reply #17 on: May 08, 2024, 09:44:40 am »
I thought Vic World had it several years ago and sold it for around $250k with the original rubber on the tires.
I seem to remember an article about the sale.
I thought so too, but that was one of the 4 pre-production bikes (the Candy blue green one).

I had no idea he owned/restored the prototype precursor to these 4. What an insane machine - I’m surprised Honda don’t have it in their possession?


Sent from my iPhone using Tapatalk Pro

Offline Glenn Stauffer

  • SOHC/4 #3 - Member since 1994
  • Administrator
  • Expert
  • *****
  • Posts: 1,295
    • The SOHC/4 Owners Group
Re: 1968 CB750 Example
« Reply #18 on: May 09, 2024, 05:36:32 am »
Here is an article on a CB750 claimed to be one of the early prototype bikes.  http://www.sohc4.com/cb750/history/#the-cb750-prototype

The article and English translation was provided to me many years ago along with these more recent color photos of the bike.  The B&W photo is from the  Japanese article.


Offline Stev-o

  • Ain't no
  • Really Old Timer ...
  • *******
  • Posts: 34,143
  • Central Texas
Re: 1968 CB750 Example
« Reply #19 on: May 09, 2024, 06:48:32 am »
Saw this yesterday in my news feed.......

"Honda CB750 Prototype Takes Top Honor At The Quail"

https://www.roadracingworld.com/news/honda-cb750-prototype-takes-top-honor-at-the-quail/

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

Offline jakec

  • Master
  • *****
  • Posts: 2,066
Re: 1968 CB750 Example
« Reply #20 on: May 10, 2024, 09:57:11 am »
Lots of info about this bike can be found here.

https://www.cb750prototype.com/

I actually helped in its restoration! An amazing piece of history.

I wish there was photos of how it looked when it was found. Do you have anything like that?
1970 CB750 K0
1970 CL350 K2
1975 CB400 F0
1977 CB750 Chop

Online 69cb750

  • Expert
  • ****
  • Posts: 1,198
Re: 1968 CB750 Example
« Reply #21 on: May 10, 2024, 06:42:32 pm »


Online 69cb750

  • Expert
  • ****
  • Posts: 1,198
Re: 1968 CB750 Example
« Reply #22 on: May 10, 2024, 06:44:46 pm »
Observe the differences between the 1969 black and white photo and the color photo.
1) Notice how the side cover enters the gromet in the two photos differs.
2) Notice the size and shape of the side cover triangle in front of the gromet differs.
3) Notice how the black and white has another step below the triangle the color photo does not have.
4) Notice how the black and white photo has a break in front of the screen the color photo does not have
5) Conclusion - these are different side covers.



Offline Ujeni

  • Enthusiast
  • **
  • Posts: 224
Re: 1968 CB750 Example
« Reply #23 on: May 13, 2024, 09:05:50 pm »
Quote
Lots of info about this bike can be found here.
https://www.cb750prototype.com/
I actually helped in its restoration! An amazing piece of history.

Sam,
Are you free to tell the story how Vic got it and what will happen with the bike ?

Though I do know the story, it is not mine to tell. I don't know if Vic is on this site. If so, perhaps he will share.

I will say that Vic has had it for a long time and told very few people about it. Again, this is a project that Vic has been working on for a long time, so I don't want to steal any of his thunder. I enjoyed helping him with the restoration and seeing the bike completely disassembled. I thought his pre-production prototype was an incredible bike (it was and still is of course)...but the ACTUAL 1968 prototype is genuine motorcyling holy-grail material.

I would be surprised if it ends up selling for less that $500k.
Ujeni Motors
Sandcast #410
Sandcast #538 Watch the restoration!
Sandcast #6592 All original daily driver.

Offline AshimotoK0

  • Hot Shot
  • ***
  • Posts: 592
  • CB400/4, 69 CB750K0, '69 CB250SS, CB350K1 CB500K0
Re: 1968 CB750 Example
« Reply #24 on: May 19, 2024, 05:25:40 am »
Just looked on Sandcast Only forum and nothing mentioned about it ...apart from my post saying the same thing.

I guess Facebook has taken over ... real shame because it was the go-to site for anything early CB750 and a wealth of knowledge on there ...probably regurgitated (and possibly distorted) on social media. At least this site and the sister UK site thrives on...long may it continue.
“Alright friends, you have seen the heavy groups, now you will see morning maniac music. Believe me, yeah. It’s a new dawn.”

Offline grcamna2

  • Not a
  • Really Old Timer ...
  • *******
  • Posts: 14,899
  • I love to restore & travel. Keep'em Going Strong !
Re: 1968 CB750 Example
« Reply #25 on: May 31, 2024, 06:34:52 pm »
Just looked on Sandcast Only forum and nothing mentioned about it ...apart from my post saying the same thing.

I guess Facebook has taken over ... real shame because it was the go-to site for anything early CB750 and a wealth of knowledge on there ...probably regurgitated (and possibly distorted) on social media. At least this site and the sister UK site thrives on...long may it continue.

I hadn't known about Sandcast Only.
75' CB400F/'bunch o' parts' & 81' CB125S modded to a 'CB200S'
  I love the small ones too !
Do your BEST...nobody can take that away from you.

Offline MauiK3

  • A K3 is saved
  • Old Timer
  • ******
  • Posts: 4,198
  • Old guy
Re: 1968 CB750 Example
« Reply #26 on: June 07, 2024, 02:22:13 pm »
Yes, it would be very interesting to know where Vic’s bike has been and how it was acquired, just the highlights. The blue bike doesn’t look right for some reason. The tank seems to be off something else like a 450. Maybe it’s a prototype tribute bike.
Hopefully the true prototype can be seen and enjoyed by many, it’s very, very cool.
I would love to hear it run, looks like there isn’t much baffling in it.
1973 CB 750 K3
10/72 build Z1 Kawasaki

Offline fastbike1

  • Full Member
  • *
  • Posts: 14
    • cb750prototype.com
Re: 1968 CB750 Example
« Reply #27 on: June 10, 2024, 01:50:45 pm »
Yes, it would be very interesting to know where Vic’s bike has been and how it was acquired, just the highlights. The blue bike doesn’t look right for some reason. The tank seems to be off something else like a 450. Maybe it’s a prototype tribute bike.
Hopefully the true prototype can be seen and enjoyed by many, it’s very, very cool.
I would love to hear it run, looks like there isn’t much baffling in it.

MauiK3,

Thanks much for your interest...although, this is now the 2nd time I've seen the word "tribute" on this Forum.
And at first I thought: "Ok, there is NO way that CB750 enthusiasts would forego looking at the website for this bike on their computer:

https://www.cb750prototype.com/


 (for which I posted some 203 fotos there!)...but rather instead electing to just look on a phone! (for which the website provider has not made it easy at first glance to find the Other SIX pages there!).

Which is the only explanation I can think of.

Because once one sees All the fotos, especially comparing all the parts piece by piece with a street bike ("Engine + Carbs" page there), it's easy to see this is the real thing..and No!, not a 450 tank!
The prototype tank IS different than a stock 750/even than a sandcast. And to answer, I found the bike some 2 1/2 decades ago, mostly in boxes (except the big parts ofc).

Thanks for your interest, and I hope you are able to see all the fotos (they ARE viewable on a phone...seeing all 203 images a bit tedious there I would think).
Navigation from the Home Page is a bit hidden...JUST hit the 2 little dashes at the very top).

And I've long ago brought this up with the website firm, asking them can we put a simple "Menu" there instead of the dashes?...They even agreed it was a good idea!  lol...but still no change.

Thanks again,
Vic

Offline fastbike1

  • Full Member
  • *
  • Posts: 14
    • cb750prototype.com
Re: 1968 CB750 Example
« Reply #28 on: June 11, 2024, 10:29:59 am »
Has anyone seen more information on this bike? It's not on the Vic World website. I found it randomly on instagram today.

https://www.instagram.com/p/C6j5CM0ShU-/?utm_source=ig_web_copy_link&igsh=MzRlODBiNWFlZA==

Jakec,

Thanks very much for starting this post. I actually just now saw your question about if there were prior old fotos (other than everything on the website)

https://www.cb750prototype.com/

Although.... when assembling it, I Did take a ton of fotos of each individual part (go to "Engine +Carbs" or "Frame" pages there for example).... when I found the bike, there were not even cell phones!

The bike (except for the big pieces) was mostly in boxes.

Ok, thanks again for your interest.
Vic

Offline Stev-o

  • Ain't no
  • Really Old Timer ...
  • *******
  • Posts: 34,143
  • Central Texas
Re: 1968 CB750 Example
« Reply #29 on: June 12, 2024, 09:17:07 am »
Has anyone seen more information on this bike? It's not on the Vic World website. I found it randomly on instagram today.

https://www.instagram.com/p/C6j5CM0ShU-/?utm_source=ig_web_copy_link&igsh=MzRlODBiNWFlZA==

Jakec,

Thanks very much for starting this post. I actually just now saw your question about if there were prior old fotos (other than everything on the website)

https://www.cb750prototype.com/

Although.... when assembling it, I Did take a ton of fotos of each individual part (go to "Engine +Carbs" or "Frame" pages there for example).... when I found the bike, there were not even cell phones!

The bike (except for the big pieces) was mostly in boxes.

Ok, thanks again for your interest.
Vic

Hi Vic....first off, thanks for coming on the forum and sharing all the interesting info on this very special bike.

Would you mind sharing the story on how you happened to find and purchase it?  Thanks
'74 "Big Bang" Honda 750K [836].....'76 Honda 550F.....K3 Park Racer!......and a Bomber!............plus plus plus.........

Offline fastbike1

  • Full Member
  • *
  • Posts: 14
    • cb750prototype.com
Re: 1968 CB750 Example
« Reply #30 on: June 12, 2024, 11:38:56 am »
Has anyone seen more information on this bike? It's not on the Vic World website. I found it randomly on instagram today.

https://www.instagram.com/p/C6j5CM0ShU-/?utm_source=ig_web_copy_link&igsh=MzRlODBiNWFlZA==

Jakec,

Thanks very much for starting this post. I actually just now saw your question about if there were prior old fotos (other than everything on the website)

https://www.cb750prototype.com/

Although.... when assembling it, I Did take a ton of fotos of each individual part (go to "Engine +Carbs" or "Frame" pages there for example).... when I found the bike, there were not even cell phones!

The bike (except for the big pieces) was mostly in boxes.

Ok, thanks again for your interest.
Vic

Hi Vic....first off, thanks for coming on the forum and sharing all the interesting info on this very special bike.

Would you mind sharing the story on how you happened to find and purchase it?  Thanks

Stev-o,

Thanks very much for the kind words!
Nothing special really (as to your question)..
I simply heard about a "low number" bike almost several decades ago, went to see it, and recognized what it was!

Ok, thanks again,
Vic

Offline jakec

  • Master
  • *****
  • Posts: 2,066
Re: 1968 CB750 Example
« Reply #31 on: June 14, 2024, 09:20:00 am »
Hi Vic. Thanks for responding. The prototype website is awesome, especially the comparison photos with original promo shots. I've also read the introduction a few times. I did not know about that site until someone linked it in this thread. Before that I would just read the sandcasts only site, for their prototype and early production info.

I think given the significance of the bike, people would like to know as much info as they can like,

-where was it when you found it? (It would be really cool to see a pic of it as you found it)
-what was the guy like who sold it (enthusiast or clueless)?
-how long did he have it?
-did he know what it was or think it was just another sandcast? 2.5 decades ago is 2000, people were aware of sandcasts' significance by then, right?
-did he take it apart or find it like that?
-was it all there, or did you have to recreate some parts from photos?
-have you ever started it?

Sorry if that's too many questions but I'm sure people want to know everything they can about it. Thanks!!
1970 CB750 K0
1970 CL350 K2
1975 CB400 F0
1977 CB750 Chop

Offline fastbike1

  • Full Member
  • *
  • Posts: 14
    • cb750prototype.com
Re: 1968 CB750 Example
« Reply #32 on: June 14, 2024, 10:57:34 am »
Hi Vic. Thanks for responding. The prototype website is awesome, especially the comparison photos with original promo shots. I've also read the introduction a few times. I did not know about that site until someone linked it in this thread. Before that I would just read the sandcasts only site, for their prototype and early production info.

I think given the significance of the bike, people would like to know as much info as they can like,

-where was it when you found it? (It would be really cool to see a pic of it as you found it)
-what was the guy like who sold it (enthusiast or clueless)?
-how long did he have it?
-did he know what it was or think it was just another sandcast? 2.5 decades ago is 2000, people were aware of sandcasts' significance by then, right?
-did he take it apart or find it like that?
-was it all there, or did you have to recreate some parts from photos?
-have you ever started it?

Sorry if that's too many questions but I'm sure people want to know everything they can about it. Thanks!!

Jakec,

Thanks for all the great words about the bike. Appreciate it.
I think I've pretty much answered most (in prior responses here)...all that I know or can remember at least.
It was actually the Mid 1990's, and as mentioned, there were no cell phones then, so no pics were taken.
You have to understand...at that time, i was buying 1 or 2 sandcasts a month!...so my concentration was mainly on finding the bikes then.
Found in Socal, from an older guy who had it a long time, he had taken it apart (the motor was not taken apart, but missing a few of the lower engine covers, for which I had to sandcast from fotos).
And after it was back together, yes I did run it... two different times (the tach cable was old and sticking, so replaced it with a very old NOS cable), and started it again the second time for a few minutes.
That's about all I know...the comparison fotos on the website Really show all the differences, and I felt that was the most important thing to concentrate on (besides making it whole + running again, ofc).

Ok, thanks much again,
Vic

Offline jakec

  • Master
  • *****
  • Posts: 2,066
Re: 1968 CB750 Example
« Reply #33 on: June 15, 2024, 09:09:02 pm »
 I have a million more questions still but I'll ask what comes to mind first given your response. If it was the mid 90s, what was the method you'd find the bikes, I assume if it's more than one sandcast per month you're doing national searches, it must have been something like physical print cycle trader? And you would call and ask the seller for the VIN and EIN? Then drive out to them wherever they were and try to play it cool and get a good deal?

I've read your writeup on the Vic World site too and it mentions how you decided pretty early the bikes would be significant and started buying them up. I can say from my own experience the first K0 I saw for sale locally was in 2018 for $3500 and I said too much (kind of a bolt up chopper but had all the original paint)... later in 2023 I buy a bone stock one for $10,000... so ironic haha although the other is much much nicer. Still it's funny to me. In retrospect it seems event before the 90s-90s people should have realized the significance of the original inline 4 sport bike as that became the standard soon after.
1970 CB750 K0
1970 CL350 K2
1975 CB400 F0
1977 CB750 Chop

Offline fastbike1

  • Full Member
  • *
  • Posts: 14
    • cb750prototype.com
Re: 1968 CB750 Example
« Reply #34 on: June 16, 2024, 09:26:16 am »
I have a million more questions still but I'll ask what comes to mind first given your response. If it was the mid 90s, what was the method you'd find the bikes, I assume if it's more than one sandcast per month you're doing national searches, it must have been something like physical print cycle trader? And you would call and ask the seller for the VIN and EIN? Then drive out to them wherever they were and try to play it cool and get a good deal?

I've read your writeup on the Vic World site too and it mentions how you decided pretty early the bikes would be significant and started buying them up. I can say from my own experience the first K0 I saw for sale locally was in 2018 for $3500 and I said too much (kind of a bolt up chopper but had all the original paint)... later in 2023 I buy a bone stock one for $10,000... so ironic haha although the other is much much nicer. Still it's funny to me. In retrospect it seems event before the 90s-90s people should have realized the significance of the original inline 4 sport bike as that became the standard soon after.

 I will take the time here to answer what you've written.
To find Honda parts, one thing i did was send letters out to all the Honda Dealers in the U.S., as well, I visited personally as many Dealers as I could, as well as contacting many bike junk yards.
This put me in contact (thru word of mouth) with "CB750 owners" sometimes as well, that "had an old CB750 lying around".
Yes, I DID search every week thru print material such as Cycle Trader, and other weekly rags (found at local 7-11s) that were sold, listing all kinds of things for sale, such as washing machines, cars, boats, motorcycles, etc.
As well as Walneck's Cycle Trader, and Old Bike Journal.

Many people in fact did NOT know what a "sandcast" was at the time...thinking it was "just an old CB750 Honda".
And yes, there WERE a Few key people than that I was competing with, that Did know what the bike was....and those few were filling containers with sandcasts (along with Z-1s, and 400-4s), and shipping those to Japan.
In 99% of the cases, I did not need to "play it cool" with the seller, as again he thought that he just had an old CB750...that he simply wanted out of his garage. The exception, was when I would have to fight against one of the "exporters"..all of a sudden offering big money.
Anyway, the landscape certainly changed once 2000 or so came around, and the sandcast became the new buzz word amongst all motorcycle enthusiasts.

Ok,Hope this clears this up.

Thanks,
Vic