OK
Pull the spark plug out and see if it has a shiny glitter on it...if it does then you can bet that you burnt a hole in the top of the piston...if you can get the piston to the top of the head does it move from side to side? Is ther lots of oil on the plug usually if you break a ring you will get lots of smoke the plug is really oily. I f you burn a hole in the piston then the spark plug is a silverish/whitish..in color...if it isn't the piston...you have some real problems. Pulling the head off will reveal the problem. If you take it into the shop tehy can cross hatch hone it for you get you a new pistoon and rings and you have to break it in gently,,,in fact adding a litle oil to the fuel tank is customary for a great break in, but don't over rev it and make sure you break it in slowly. or you will have to start all over again...YOu will be surprised at how fast one of these bikes can be rebuilt...I had an old Kawi 175 and we rebuilt it at the shop in less than an hour. New rings, piston, wristpin clips, gaskets, honed the cylinder, new spark plug, even adjusted the carb. Although it had an oil injection pump on it we added some 2 stroke oil to the gastank for the break in. I rode it pretty easy for a couple of weeks, then gradually started putting more throttle on...