Just for a change to a motorcycle related post, I have finally got a decient
primary for my 43
WM20.
Previously I had been using 2BA set screws to hold the cover on as the chain was
running dry
( greased actually) as I could not remove the inspection plug, level or drain
bolts all these had
been "painted in" by a "professional restorer" who had done the cove in 2 pack.
OTOH it did look nice & shinny black.

Now the problem is when I put oil in I don't think that the 2 BA set screws that
I have been
using to date will be able to clamp the cover tight enough to make an almost oil
tight joint.

According to the parts book they should be 3/16" CEI Set Srews which are a lot
closer to
3/16" BSF ( both being 32 tpi) than 2 BA which actually is 31.5 tpi.
What is every one else using ?
If not 2 BA then where are you getting your bolts from.
The only screws that I can find are 2 BA's.
Bike Beesa
Trevor