For your troubleshooting advice I offer you this sick dog:
1978 Batavus Regency
800 miles on the speedo
Runs very rough.
Lots of white smoke.
Lots of oil being spit out of the tailpipe.
20 mph top speed.
Must full throttle to keep from dying.
This is what I've done
Cleaned carb through everything twice.
New gas mix.
New spark plug.
Removed pipe and checked for build up. Looks new and nice inside.
Removed head and checked for un even wear/ scratches. Clean and nice.
Found oil seeping out from the exaust port. Tightened it up.
Your thoughts my Moped friends?
I'd like to get your ideas. They are always helpful.