huh, man thats how its supposed to act. i would slap your new carb on if you dont have mods put a 230 mikuni small hex jet in if you got a pipe or somethig mabey toss a 270 in for starters and ride that biatch. i bet your problem is plugs "loading up" then when you get on it the extra gas/oil is getting burned. edit: i see now you have a oko carb, lots of members use them so just ask around if you need jetting hwlp with it. i run a 34mm pj so im no help with your oko.
Really? enough oil on the plug to smear on your hand is OK? I though for sure that and the excess smoke would be a crank seal. Im still gonnna get some tests done in the near future.