Cam Chest Spacers

[dukekleman]

I'm looking for information regarding the cam chest spacers used from 1936-1969 under the gear cover on the timer gear shaft and idler gear shaft.
The part numbers are 25800-36 and 25800-36B
Does anyone have a shop dope/service bulletin they can share regarding this change over?

Photos of each shown below
Screenshot_20250306-065146.png
Screenshot_20250306-065343.png
Thank you in advance,
Duke Kleman

[Jerry Wieland]

I'm looking for information regarding the cam chest spacers used from 1936-1969 under the gear cover on the timer gear shaft and idler gear shaft.
The part numbers are 25800-36 and 25800-36B
Does anyone have a shop dope/service bulletin they can share regarding this change over?

Photos of each shown below
Screenshot_20250306-065146.png
Screenshot_20250306-065343.png
Thank you in advance,
Duke Kleman

The top one is early. 1936 to sometime in the panhead era and is held in place with a snap ring.
The bottom one is later pan through 1969 and eliminates the snap ring.

[dukekleman]

Jerry,
Thank you for the reply. I was aware of that information, I guess more curious if anyone has the shop dope/service bulletin information regarding the update change

Thanks