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Author Topic: Restoration of Sandcast #97  (Read 137520 times)
markb
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« Reply #660 on: November 08, 2015, 06:11:27 PM »

Like I said in an earlier post, I still have a few things to do on #97.  Hopefully some of you may get a chance to check it out.  If you do please let me know if there is something that looks incorrect.  I was going to see if anyone would catch a couple of details but I decided to point them out.

Besides the wire harness that I already mentioned I still need to redo the oil pressure switch wire.  Those aren’t details you would see.  If you look close you may see the following items.

I think the carbs are bit too dark.  I would like to find a way to lighten them.

I used some repro tach and speedo cables that I had made up from MotionPro.  They’re not bad.  They have almost correct looking short nuts but I am going to try to get some closer matches.

The fuel lines are the wrong size.  I just ran out of time to source the right ones.

And the spoke nipples are incorrect.  I didn’t lace up the wheels.  I was more worried about the color being correct and didn’t notice that I had given the mechanic the wrong ones.  Here’s a pic showing the correct nipples on the right.


When I get time I will make a list of everything that is correct.
« Last Edit: November 08, 2015, 06:18:54 PM by markb » Logged

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?)
kenhan
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« Reply #661 on: November 09, 2015, 02:40:56 PM »

My carbs was painted red for some reason. I sodablasted them and after that they became quite bright, almost like new aluminum.
I attach a picture, as you maybe can see there is still some red paint left in small corners.

/ken
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1969 CB750 Sandcast #5084 - running
1969 CB750 Sandcast #5128 - Running
1970 CB750 next project
1975 K2 (K3-5 don´t exist in Sweden) - Running
1981 Goldwing 1100 Interstate
Steve Swan
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« Reply #662 on: November 09, 2015, 04:23:13 PM »

not 2 steal Mark's thread, but carbs on 1865 are the 1st set i had turn dark after running them through the ultrasonic...  i have a bead blast cabinet, a 100# siphon blaster.....  my question is, if i were to go the soda blasting route, do i have to buy a special setup for soda blasting ?

and.... does soda blasting alter the surface texture of the carb body.... ?

Thanks !
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Honda CB750 Sandcast Forum
« Reply #662 on: November 09, 2015, 04:23:13 PM »

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markb
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« Reply #663 on: November 09, 2015, 05:13:26 PM »

Ken,
Is that all you did was soda blast?

Steve,
No worries.  I'd like to know too.
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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?)
kenhan
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« Reply #664 on: November 09, 2015, 05:48:11 PM »

Yes, It was just soda blasted. I have to say I was amazed by the result. I´ll attach a couple of photos of  the same carburators during the blast.

Soda blasting is perfect on aluminum and will not alter the texture, it will only be very clean. You could use it on gasket surfaces or inside a carburator with no harm att all. You could rinse excessive soda with water.

I just bought a very cheap blasting gun and blasting soda, put it into a bucket and started to blast outside. I also blasted the crankcases and they became very clean but not with an altered texture at all.

/Ken
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1969 CB750 Sandcast #5084 - running
1969 CB750 Sandcast #5128 - Running
1970 CB750 next project
1975 K2 (K3-5 don´t exist in Sweden) - Running
1981 Goldwing 1100 Interstate
kenhan
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« Reply #665 on: November 09, 2015, 05:52:04 PM »

I could see that it looks little like changed texture on the second picture but I think there is still powder on it, it was newly blasted as you could se from the powder rigth below. The texture is totally unchanged when you see it live.
/Ken
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1969 CB750 Sandcast #5084 - running
1969 CB750 Sandcast #5128 - Running
1970 CB750 next project
1975 K2 (K3-5 don´t exist in Sweden) - Running
1981 Goldwing 1100 Interstate
Steve Swan
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« Reply #666 on: November 09, 2015, 11:45:14 PM »

Have you tried soda blasting float bowls?
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kenhan
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« Reply #667 on: November 10, 2015, 12:19:46 PM »

Don´t want to steal Marks thread but I´ll answer this one.

No I have not soda blast the bowls cause i didn't have to. I polished them a little later in the assembly progress.
I think they should have been as clean as the rest of the carbs. Soda blast will not affect the surface but it will take away semihard things like paint, and dirt. It will not affect things like plastic because thats kind of both soft and hard. There is plastic in the choke parts and the only became clean. Like they said back in the year of our bikes "Try it you´ll like it"  Smiley

/Ken
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1969 CB750 Sandcast #5084 - running
1969 CB750 Sandcast #5128 - Running
1970 CB750 next project
1975 K2 (K3-5 don´t exist in Sweden) - Running
1981 Goldwing 1100 Interstate
CBman
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« Reply #668 on: November 11, 2015, 02:19:05 PM »

Mark, really excellent job!!! I like your care you take to every detail on the bike.
Museum in L.A. should be happy they have to have one of the most nicest restored sandcasts in the world.
John
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markb
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« Reply #669 on: November 27, 2015, 10:44:46 AM »

I ordered a personalized license plate for 97 about 12 weeks ago.  It was only supposed to take 8 weeks to get it but I finally got it.  I don’t know about other states but Minnesota doesn’t stamp them anymore, they print them.  I don’t think they look as good but it still makes a nice finishing touch.  I’m sending to the museum and they will put it on for me.

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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?)
cb7504
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« Reply #670 on: November 27, 2015, 02:09:42 PM »

nice
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kp
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« Reply #671 on: November 27, 2015, 02:40:40 PM »

Great finishing touch
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Yabba Dabba KP
markb
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« Reply #672 on: November 30, 2015, 01:34:02 PM »

Now that I have some time I will try to catch up on my posts.  The #97 carbs have different vents than the later carbs.  Here is a pic with the #97 carb on the left with a straight vent tube.


Here’s a closer view of the straight tube.  I suspect this feature is quite rare.


Here is the typical angled tube for comparison.


The T-joint between the 1-2 and 2-3 carbs is different too.  The early version with the shorter cross tube is on the left.

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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?)
Ujeni
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« Reply #673 on: November 30, 2015, 01:38:54 PM »

Funny that you mention the venting tubes. Indeed, they are very rare. Vic mentioned them in a conversation once.

Interestingly, I have straight vents on #836 and not on #410. Note sure why and I am sure both are original to the bikes. Perhaps another example of early sandcast randomness?
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Ujeni Motors
Sandcast #410
Sandcast #863 (restoration coming soon)
Sandcast #1378
Diecast #16608
K1
markb
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« Reply #674 on: December 01, 2015, 09:38:16 AM »

ESR (Early Sandcast Randomness)   Grin I like it.  I think you've coined a new term that explains some of the differences in the early units.   Wink Cheesy
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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?)
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