Originally Posted by DavidP
I gave up trying to understand the haphazard way in which BSA delivered the change over to unified fasteners. The 5/16" rocker cover studs are unified, but the 1/4" are CEI, on the same head casting!?!

The carb studs remained 5/16” BSF/CEI also

Now let’s all have a beer beerchug

68’ A65 Lightning “clubman”
71’ A65 823 Thunderbolt (now rebuilt)
67’ D10 sportsman (undergoing restoration)
68’ D14 trials (undergoing transformation)