Honda CB750 Sandcast Forum
November 19, 2017, 07:24:28 AM *
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 1 
 on: Today at 05:45:27 AM 
Started by ashimotok0 - Last post by Sgt.Pinback
Uli,
The oil bowl bulletin (#13) refers to the replacement of the first version finned bowl, which was not ribbed inside and so cracked around the centre boss if the bolt was over-tightened, with the second type finned bowl which had strengthening ribs around the inner boss. The reason the replacement did not apply to engine numbers from 1 to 1782 is presumably because these were factory fitted with the round oil bowl which did not suffer cracking problems.
Just my interpretation of the available info.

Chris R.

Consequently, fin less round bowl would have ended with # 1782.

But distiction list says

28. round, fin-less, non-webbed oil filter cover, E1-E4148

 2 
 on: Today at 05:38:13 AM 
Started by 4pots1969 - Last post by Sgt.Pinback
Never seen that or heared about that. Cool finding,thanks.

 3 
 on: November 18, 2017, 03:31:05 PM 
Started by 4pots1969 - Last post by 4pots1969
Here is an information note from the Honda France service dated September 2, 1969 and which says:

Subject: Replacement of the brake master cylinder of the CB750
When the first CB750s arrive, it will be absolutely necessary, for technical reasons, to replace the master cylinder, whose tank is equipped with a window making the level visible, by a new model with transparent plastic tank ... etc ... etc. ..etc

* I just translated the beginning because after they talk about the purge to be done...

 4 
 on: November 17, 2017, 02:22:56 AM 
Started by ashimotok0 - Last post by Sgt.Pinback
Uli,
The oil bowl bulletin (#13) refers to the replacement of the first version finned bowl, which was not ribbed inside and so cracked around the centre boss if the bolt was over-tightened, with the second type finned bowl which had strengthening ribs around the inner boss. The reason the replacement did not apply to engine numbers from 1 to 1782 is presumably because these were factory fitted with the round oil bowl which did not suffer cracking problems.
Just my interpretation of the available info.

Chris R.

Thanks, you are right. "2" is the finned version with ribs inside.

So the version without fins outside (round case) had not been replaced by SB?


 5 
 on: November 16, 2017, 04:44:04 PM 
Started by ashimotok0 - Last post by kp
Hi Ash
Thanks for sharing Great reads  Smiley

 6 
 on: November 16, 2017, 02:37:12 PM 
Started by ashimotok0 - Last post by hondasan
Uli,
The oil bowl bulletin (#13) refers to the replacement of the first version finned bowl, which was not ribbed inside and so cracked around the centre boss if the bolt was over-tightened, with the second type finned bowl which had strengthening ribs around the inner boss. The reason the replacement did not apply to engine numbers from 1 to 1782 is presumably because these were factory fitted with the round oil bowl which did not suffer cracking problems.
Just my interpretation of the available info.

Chris R.

 7 
 on: November 16, 2017, 01:19:27 PM 
Started by ashimotok0 - Last post by Prospect
This is great.  Thanks so much.  Love reading the history of the early ones and how improvements were made. 

 8 
 on: November 16, 2017, 12:36:50 PM 
Started by ashimotok0 - Last post by kenhan
Thanks!

just what I wanted!

/Ken Smiley

 9 
 on: November 16, 2017, 07:33:16 AM 
Started by ashimotok0 - Last post by 4pots1969
Excellent... Thank you for the generous sharing !! Wink

 10 
 on: November 16, 2017, 07:13:03 AM 
Started by ashimotok0 - Last post by ashimotok0
Ash is back !  Hi Ash !

Never been away Steve but last November I came upon a stash of bikes in a garden in the south .. this made my bike collection grow, taking on a '64 CB72 Hawk and a '67 CB450K0 Black Bomber (all in bits in boxes in the garden) plus other waifs and strays including a CX500 with only 305 miles on the clock, left to rot in a shed. Next year I plan to go to 3-days / week at work  so at last I will have chance to finally assemble all of my projects (inc. my 10/69 UK diecast and my 3/71 CB500K0). I just discovered your doc's you put on here on the dealer setup for the sandcast. Wow !

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