Honda CB750 Sandcast

Main oil gallery plug

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Tony Wohlers

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Can You brave member's in here tell me about the main oil gallery plug on the right side off the upper engine case--are this plug just polished or is it cromed.I think it's polished but i am not shure??
I have read Vic vorld's notice about painting the engine cases, and i think if looking around the startermotor the paintjob on my 1005948 is Honda made.

I have to clean the old engine paint of the cases, are the best solutions bead blasting with tiny plastic---


kp

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Kawa900
I would suggest the plug is as it comes out of the die. Maybe polished but certainly not chromed.
Engine cases are best cleaned by blasting with a soft media. Vapour blasting is perfect for sandcast cases. KP
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markb

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Anyone know what size hex is on the plug?  I have two different sizes and I can't remember which one came off E100.
Mark B
1969 CB750 sandcast #97 restored - Sold Restoration thread link
1969 CB750 sandcaxt #576 - Sold
1969 CB750 sandcast #1553 - Sold
1969 CB750 sandcast #1990 - Sold
1969 CB750 sandcast #5383 restored - Sold Restoration thread link
1970 CB750 K0 restored - Sold
2010 H-D Tri Glide Ultra Classic (Huh?)


kp

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17mm  ;D Kawasaki 900 has the same plug  :o
That will be $20 and I do accept Pay Pal  8)
Yabba Dabba KP


hondasan

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17mm indeed. They were also fitted to die cast K0's which actually had three of them fitted (two additional ones in the underside of the lower) crankcase), which provides a possible alternative source of them.

As an aside, there appears to be at least two variations of the 17mm head oil gallery plug - ones which are solid, and ones which are recessed internally. E302 and E1106 both have the solid type.

Cheers - Chris R.
Chris R.
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Wayne

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kp

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Hey Mark, That's another $20 for Chris  :o
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markb

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I finally found one of my solid plugs.  One that I think it will clean up real nice.  Thanks for all your help.
Mark B
1969 CB750 sandcast #97 restored - Sold Restoration thread link
1969 CB750 sandcaxt #576 - Sold
1969 CB750 sandcast #1553 - Sold
1969 CB750 sandcast #1990 - Sold
1969 CB750 sandcast #5383 restored - Sold Restoration thread link
1970 CB750 K0 restored - Sold
2010 H-D Tri Glide Ultra Classic (Huh?)