The smoking was more than likely because you chenged the oil, not the plug..
Don't really know why the 200/185cc engine do this but it have experienced it also.
Run it a while, it should stop. If not it may need rings..if the oil level was low before the change it wouldn't smoke much, if at all.
After change with the oil at proper level, a fog machine!! I've bought those too..
Last edited by dougspcs; 05-14-2012 at 11:35 AM.
Current toys..
1986 Honda 350X..trail bomb!
1985 Honda 250SX..my main mudder
1985 Honda 250ES..Back in Black Trike
Current non-trike toys:
1990 Honda TRX300FW
1995 Seadoo GTX
1998 Polaris Indy Lite 340(Nearly new looking)
1998 Polaris Touring 500
1998 Club Car (electric)