I went on the st.malo annual poker derby this past weekend. While on the trail it started to smoke then I noticed it was loosing power then on my way home it stalled, got it running again and just as i was pulling in to my driveway it just started smoking like crazy and bogged right out had barely any power,anyway i droped the oil and there was a piece of the piston that fell out. Now im gunna have to rebuild it. What is the biggest you can bore the jug over and what other internal parts that i can change to gain in power.

 

2mm (.080 over)

Bump up the compression to 10.5 to 1 and get an aftermarket cam for it. aftermarket exhaust, and a xr200r carb, and an airfilter......at that point you should be pretty good to go with that 200x [img]i/expressions/face-icon-small-happy.gif[/img][img]i/expressions/face-icon-small-happy.gif[/img]

 

is the xr200r carb that much better then the stock one? and is the xr200r cam an aftermarket cam or is it something else?