220 Conversion well worth the $$
I had Freddette convert my 200 to 220 a few years back. I loved the results. It requires boring, porting and replating the cylender. The results were amazing. The bike has more power throughout. I am on year 4 since the conversion and would do it again in a heartbeat. If your cylender is in good shape, I would consider the cost, it ran me north of $300 plus the new piston and gaskets.
I put my money in a pipe and silencer first, then a few hundred in the suspension, then the conversion to a 220.