just got back on a 2 stroke after 6 years on 4 strokes, new ride tm300 and lovin it . 
Welcome to the forum Steeve. May I ask, what made you comeback to the smokers?
theres a couple of reasons , first of the cost of maintaining the 4$ was getting to me as i was changing oil all the time doing air filters every ride and always had at least 3 spare filters ready to go into it as they seem to get dirty twice as quik as 2 strokes .
2nd working on them is a P.I.T.A every thing is cramed into them so tight , swearing usually started about 5min into the job
3rd parts seemed to cost more for the equivalent parts on 2 strokes
4th weight ! i started on a crf450x and it was way to heavy for where i ride, ended up taking the mrs 250x and sold the 450r i got after selling the 450x
5th there are no 4$ that have all the things i wanted and the tm was perfect for me as soon as i rode 1 i was hooked , what i was after was a bike that was light and flickable in the tight stuff but would run with the big bikes when the trail opened up, is capable of hauling me around the mx track and it had to be registerable , basicly the tm is a perfect all rounder