SB's in one document ... at last !

[ashimotok0]

Took a bit of doing and a massive  thanks to Bryan Jones for loaning me some missing ones. Enjoy!

https://www.dropbox.com/s/xkkwyl5lteti976/CB750%20Service%20Bulletins.pdf?dl=0

If anyone has any of the missing ones please let me know !

[Sam]

This is great! Thanks for sharing with the community!

[Nap Bollemeijer]

I've got quite a few of them as well, don't know if they are the same tough.
Is there a list or index of some kind to identify them eg. 750#4 9/22/69 for the first one.

[ashimotok0]

I've got quite a few of them as well, don't know if they are the same tough.
Is there a list or index of some kind to identify them eg. 750#4 9/22/69 for the first one.

http://www.hondachopper.com/engine/bulletins/bulletins.html

[ashimotok0]

Also  these but not sandcast sorry,

https://www.dropbox.com/s/mtgzuaofgk3ljpc/CB500%20Four%20SB%27s.pdf?dl=0
https://www.dropbox.com/s/zu929p1n31clrv6/Misc_SB%27s.pdf?dl=0

[Steve Swan]

Ash is back !  Hi Ash !

[Sgt.Pinback]

Hi Ash, thanks.


Regarding bulletin # 13, oil filter case:

why was application only from 1001783 onwards, and not for all bikes starting  # 1 ?

[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 !

[4pots1969]

Excellent... Thank you for the generous sharing !!

[kenhan]

Thanks!

just what I wanted!

/Ken

[Prospect]

This is great.  Thanks so much.  Love reading the history of the early ones and how improvements were made. 

[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.

[kp]

Hi Ash
Thanks for sharing Great reads 

[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?

[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