hey all,a year ago i got my 125 and rode it till i was reving the piss out of it and confident on it,then after 8 months of 125 ripping ,i traded it for a kx 500 and enjoyed it even more,till i found out it was a HOT bike(2 months later) and sold it,to get a kx 250 and rode the bag of that only to blow it up after 10 hours owning it.my fav bike out of them all was the 250 but the funnest i felt was my rm 125.ive never rode a 4 stroke mx bike before and was thinking that a 4 stroke might be a good option for my next mx bike.i am a trail,woods,sand pit rider.i like the powerband of the 2 strokes but now i am looking for more low to mid grunt.i am by no means a pro but am fairly quick in trail and woods terain.i weigh 250 pounds,would a 250f be to small for me or should i go with a 450f,i herd the 450s are more reliable,your opinions would be great,thanks