This is from someone in my club:
"The 912 is 743342 ('65) and has the correct solex carbs (no air cleaners) with a very snazzy exhaust system that would exit through the bumper guards. Also has a flywheel. With the taller C oil filler it won't fit in an A or B unless you cut it down. I'm sure the generator and coil is 12v. $4000"
If anyone's interested, email me and I'll pass along contact info.
gn