Decided to purchase my 7 year old son a starter bike, and would welcome input regarding experiences with either the Honda CRF 70 or Yamaha PW 80. Anticipate him moving rapidly up to conventional shift larger bike, but initially believe the automatic would facilitate an easier transition from bicycles. Also, any input regarding buying new vs. used would be appreciated. I am located in Flower Mound, TX (DFW suburb). Thanks, Steve