I recently changed from a 00yz250 to the 426 and have about 14 hours on the 426. I did not consider the 250f in the beginning. My concerns with the 426 are the wieght, Im 5'10 155lbs and not used to the extra feel, I also have a time with "rolling the throttle on" although it is getting better, the 426 also is monstrously torquey at unpredictable moments. I could go on, I mostly ride mx and am thinking of the 250f or going back to the two stroke. The question is- Should I continue learning the 426? Does the bike as a package become easier to ride? Is the 250f a wrong choice for mx tracks with larger doubles and triples? Thankx for any imput.