:think: Truly believe that I have the tools,ability and resources to do the porting and head mods to my 2003 220 I need some help with the specs? do the ports just need a good cleaning? or does the exhaust port height need changing? How much compresion can it take at 5000' and above? Can the timming be adjusted at the stator plate to compensate for high compression? Sorry! I could be running on?? my first time on forums. I love my bike she just needs some mo go. I'm comming off an 04 KTM 450 exc (Long story!). She is feeling quite slow at the moment. can anyone shed some light? Right now it is piped w/no air box lid with plans for a carb mod to 36mm and divider. I'm assuming that the old girl would benfit greatly from a little massage of the air ways and a shorter lid???. I could send the stuff to FRP! but i kind of want to get intimate with the inner workings of this motor (cuz I have no life at the moment). Any insite?