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Author Topic: Restoration of Sandcast #97  (Read 111825 times)
Ujeni
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« Reply #705 on: August 03, 2016, 05:50:41 PM »

Mark,

I was able to visit the Petersen Museum about two months ago and saw your bike up close. As good of a restoration as I have ever seen. Excellent work. Any getting a lot of attention! One of the jewels of the museum for sure!

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Ujeni Motors
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« Reply #706 on: August 03, 2016, 06:16:57 PM »

Marcel, thanks for the nice compliment. You helped make it possible with your excellent job of restoring the gauges.  Wink

It is a great honor for me to be part of your awesome project, Mark!
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markb
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« Reply #707 on: August 04, 2016, 09:35:11 AM »

Mark,

I was able to visit the Petersen Museum about two months ago and saw your bike up close. As good of a restoration as I have ever seen. Excellent work. Any getting a lot of attention! One of the jewels of the museum for sure!


Thanks, Sam. That is very flattering coming from you. You were also a huge help. It would not have been as good without your help with the black anodizing the control housings.
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Mark B
1969 CB750 sandcast #97 current project Restoration thread link
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1969 CB750 sandcast #5383 Sold Restoration thread link
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Honda CB750 Sandcast Forum
« Reply #707 on: August 04, 2016, 09:35:11 AM »

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markb
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« Reply #708 on: January 02, 2017, 02:38:46 PM »

I was checking out this thread on the SOHC4 site, http://forums.sohc4.net/index.php/topic,162483.0.html and ended up discovering something surprising (at least it surprised me).

Back when I was working on E100 I decided not to use the original cylinders. They had been bored to 1mm oversize and had a broken fin. I compared them to E1789 and found them to be identical. The engine wasnít going to be completely original anyway so I decided to use the E1789 cylinders. At least it would be correct.

Since I was using the E1789 cylinders I decided to use the matching head. It was in better condition than E100 and I found them to be identical too. So here comes the surprise. While looking at towers I happened to look at the E100 head (I saved it of course). Hereís pics.


Can you spot anything unusual?


Ding, ding, ding, ding. It is missing the outside spot faced holes that are under the towers! I canít believe I didnít catch that. According to the CB750-K2 parts manual only two of the small o-rings were required up to engine number 563. I know I had seen that before but I didnít know why. Now itís plenty obvious. I did a search and checked the distinctions and couldnít find anything about it. So here is one to add.

Obviously there are a few engines under 563 around and I canít believe Iíve never seen anything about this. The last thing I want to do is pull out E100. But you all probably know me by now and know that I canít let this go. When I get 97 back the engineís coming out. Iíll probably re-sleeve and repair the fin and use the cylinders too. Itís still at the Petersen until February 28 so I have plenty of time to get them both ready.
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Mark B
1969 CB750 sandcast #97 current project Restoration thread link
1969 CB750 sandcaxt #576 next project
1969 CB750 sandcast #1553 next project after that
1969 CB750 sandcast #1990 next project after that
1969 CB750 sandcast #5383 Sold Restoration thread link
1970 CB750 K0 restored
2010 H-D Tri Glide Ultra Classic (Huh?)
kp
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« Reply #709 on: January 02, 2017, 04:44:33 PM »

But you all probably know me by now and know that I canít let this go. When I get 97 back the engineís coming out.
Ever the purist my friend. I like it 👏
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Yabba Dabba KP
markb
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« Reply #710 on: January 03, 2017, 12:03:55 PM »

So am I the only one that was surprised by the discovery of only two spot faced holes under the towers.  Shocked  Huh
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Mark B
1969 CB750 sandcast #97 current project Restoration thread link
1969 CB750 sandcaxt #576 next project
1969 CB750 sandcast #1553 next project after that
1969 CB750 sandcast #1990 next project after that
1969 CB750 sandcast #5383 Sold Restoration thread link
1970 CB750 K0 restored
2010 H-D Tri Glide Ultra Classic (Huh?)
hondasan
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« Reply #711 on: January 03, 2017, 02:59:45 PM »

Just been looking at some pictures of E338 taken during its restoration ten years or so back - see attached, which confirms your observation re. E100 and fits with the parts list which shows only two O-rings to #563.
I also have a recollection that the front cooling fins between the two centre cylinder heads differ in shape (larger) to those in later heads. Maybe you can check #100 against #1789 to see if you agree?

Cheers - Chris R.
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Chris R.
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Steve Swan
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« Reply #712 on: January 04, 2017, 11:45:04 AM »

i hate to say this, but i knew that with E254, BUT it never registered in my mind to make it a distinction.  i shall add it.
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Steve Swan
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« Reply #713 on: January 04, 2017, 12:05:45 PM »

i have added #93 distinction.  please review to make sure it makes sense.
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markb
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« Reply #714 on: January 04, 2017, 02:25:27 PM »

i have added #93 distinction.  please review to make sure it makes sense.
Makes sense to me. Thanks.
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Mark B
1969 CB750 sandcast #97 current project Restoration thread link
1969 CB750 sandcaxt #576 next project
1969 CB750 sandcast #1553 next project after that
1969 CB750 sandcast #1990 next project after that
1969 CB750 sandcast #5383 Sold Restoration thread link
1970 CB750 K0 restored
2010 H-D Tri Glide Ultra Classic (Huh?)
Don R
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« Reply #715 on: January 08, 2017, 07:02:28 PM »

 The Head I bought to put on 2695. Mark ID'd it as a 1-563

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markb
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« Reply #716 on: April 02, 2017, 10:52:41 AM »

After spending a year and four months at the Petersen Automotive Museum #97 is back home safe and sound. I got to go see it once. It was pretty fun. Now for some more work. I was hoping I would have the head and cylinders ready to go but no such luck. Iím about half way there. And of course summer is coming up. #97 isnít going anywhere now so when I get the parts ready she will be coming apart.

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Mark B
1969 CB750 sandcast #97 current project Restoration thread link
1969 CB750 sandcaxt #576 next project
1969 CB750 sandcast #1553 next project after that
1969 CB750 sandcast #1990 next project after that
1969 CB750 sandcast #5383 Sold Restoration thread link
1970 CB750 K0 restored
2010 H-D Tri Glide Ultra Classic (Huh?)
4pots1969
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« Reply #717 on: April 02, 2017, 07:04:28 PM »

Very sincerely... glad she came back because she was starting to miss me... Wink
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Steve Swan
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« Reply #718 on: April 02, 2017, 08:18:04 PM »

Very sincerely... glad she came back because she was starting to miss me... Wink

Gerard, i LOVE your sense of humor !  it's so nice to have members like you from different parts of the world. 
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