Topic: Cb750 Cam Covers Date Stamped

[BenelliSEI]

44=1969, they increase year to year at the same rate so 45=1970, 46=1971 etc. 

  Other tells on the early rocker covers is the waffle or X pattern seen here in the casting depressions, the case vent has no baffle, and the speedometer drive screw boss does not protrude past the rest of the casting. (feels flat)

Don..... looked at the tach drive this am and you ar spot on. Interestingly, both the K3 and K4 are different too!

[BenelliSEI]

Here’s what Don is taking about. Old one (short tach screw boss) on top.

[BenelliSEI]

Date stamp on the K3, also as Don described in his note. The lock tab is missing. I modified it to fit the S/C cover.

[Stev-o]

44 4 8 is April 8, 1969

1969-44=1925.  What happened in Japan in 1925?!

[robvangulik]

44 4 8 is April 8, 1969

1969-44=1925.  What happened in Japan in 1925?!

See reply #7

[69cb750]

48 12 11 is December 11, 1973

What happened in Japan in 1925?!

Showa date system begins, here are five date systems - https://www.meijishowa.com/info/72/japanese-dates