my kids have a 2006 crf50f and well my 3 year old had a pretty good crash a few weeks ago and refuses to ride it without me on the back, my other children ages 4, 5 and 8 ride it no problem. i am considering trading it for a 2007 kfx50 so that my youngest will feel more comfortable riding alone but i don't want my kids to grow out of it in a short time. should i trade or am i better keeping the crf? is this a fair trade?