After days of reading manuals and forms/posts I had a go at some of the fixes people suggest. The results seemed sucessful... for about 20min and until a big hill.
If you're willing and interested, here's what happened:
-Removed petcock to check fuel filter / screen
-Air filter seems ok
-Added some gas (32:1)
-Adjusted idle speed screws (to try to keep it from stalling)
-At this point the ped is running great (so I didn't check the spark plug)
-Took it out for a ride and it felt as if it were 'four stroking' (at least from the definitions I've read)
-Stopped for a coffee (and to watch people stare at my bike : )
-Hopped on again, started no problem, but still 'chugging' / four stroking
-Drove up a big hill (slow, but made it)
-Drove down the big hill, alll the while wondering what going so fast was doing to the engine?
-Slowed down, turned right and it stalled
-Started again (somewhat reluctantly) and went the restof the way down the hill
-Pulled into a parking lot and it stalled again
-On restarting is backfired a couple times, not a big bang, but definitely a backfire
-Checked the air filter again and tried riding without it (four stroking check)
-Engine was much worse without the air filter
-I let the moped sit for a couple hours, and when I tried to start it no luck. Would start to turn over but wouldn't continue
Being a newbie I have some ideas from readings posts etc. but at this point I probably know just enough to be dangerous. I'm going to clean the air filter, check the spark plug for signs of fouling and maybe try some carb cleaner (to see if that makes a difference before trying to take the carb apart).
Sorry for the long post, but I thougt I'd give as much info as I could.
Any help and suggestions are most appreciated.