Just thought i would update you all on my 06 TC250 with 300cc kit and ported head. I have had zero issues with it, the valves are staying rock solid (had the head ported and a "performance" valve job done when the 300 kit was installed). I have not once boiled the bike and it always seems to run nearly perfect with the current jetting. Yesterday i went for a ride at a good local area and put a stock husky TE can on it. I had been running the TC Ti can with a screen in it and the TE has an outlet hole about a 1/3rd the size. I ran this can at a desert race earlier this year and to my surprise thought in some ways it added power, especially on the bottom. Yesterday was the first time I ran it since then and the combination of this can and the fact that the motor finally loosening up made for quite a combo. I was shocked how much pull the motor now has. It also seems to have lost it's wanting to stall issue for the most part. Smoother, stronger harder pull off the bottom and into the mid. It did cap the top end slightly but added so much on the bottom it does not matter. I was chasing a two time enduro champ on a well setup 07 YZ250 through an area he races all the time and with my bike running so well and being in a groove I really felt like I had tons of speed with little effort. This bike is fast. It gets from corner to corner very well and can reel in bigger faster bikes at will it seems. I believe this is due to near perfect power. No wheel spin or drama trying to control the rear end or make it track. Just perfect hook up, controlled power and forward thrust. This to me is nearly the perfect off road motor. If i was racing desert it might not be my first choice but my one desert type race proved that it will hold it's own there as well. Additionally the hard pull from 1st revolution to creaming last allows you to eliminate shifts between corners and makes getting through faster trails a thing of beauty. Just pick a good gear and run the throttle. Sweet. Another thing that amazes me about this bike is how wide it can make the trail seem. It has a narrow engine and sits pretty tall on the trail making the trail feel wider and provides more options for line choice. I notice this a lot when i swap bikes with people and my feet start getting ripped off the pegs from stumps and ruts. The amazing accuracy of the handling is the topping on this cake. As you can tell I am stoked about this bike. It fits me like a glove, has gobs of usable power (much more than ANY 250F) and just flat works for me. I do need to get the suspension revalved for me. MX suspension designed for a 150 pound kid is not the hot setup for a 200 pound woods guy :>) With the motor loosening up and the TE muffler this bike is truly a dream bike. I simply love it.