Honda CB750 Sandcast

General Category => General Discussion => Topic started by: Steve Swan on September 20, 2018, 05:16:52 pm

Title: early valve inspection cap distinction....??
Post by: Steve Swan on September 20, 2018, 05:16:52 pm

i know i have raised this question  3 or 4 times in the past, and don't seem to remember any response, so here goes again with a picture attached.

when i first got interested in sandcasts around year Y2K, one of the things i noticed was was raised embossed figures "F 1" on the inside of the caps including turning marks of lathe work.  these features are not seen on later caps.

this cap is one of 8 that came with the diamond cross-hatched came on an E19xx engine.  the fact that cover was on that high of an Evin is remarkable in and of its self!

Comments?

Title: Re: early valve inspection cap distinction....??
Post by: kp on September 29, 2018, 04:09:21 pm

Mr Swan, I checked one of my early cam covers and found a cap with F3 and seems to show machine marks. The other caps have nothing and no machine mar

Title: Re: early valve inspection cap distinction....??
Post by: kp on September 29, 2018, 09:12:26 pm

Here's another cap photo from a cover dated 44 4 This cover has F1, F2 and F3 caps

Title: Re: early valve inspection cap distinction....??
Post by: Steve Swan on September 29, 2018, 09:27:40 pm

Thanks for the great reply and pics, KP.  fwiw, the diamond cam cover that was on E19xx has all 8 "F1" caps.

44 4 date......  is that April 1969?

Title: Re: early valve inspection cap distinction....??
Post by: kp on September 29, 2018, 11:51:59 pm

That's what I think No more numbers after the single 4 It has 44 a space then 4