A new 1.5-liter EcoBoost I-4 engine replaces the 1.6-liter EcoBoost I-4 in automatic-transmission form, and can be paired with engine stop-start technology, for a one-mpg improvement in fuel economy ...
Will Sexton or Tomac have more success Round 1? 15x AMA Champion Ricky Carmichael and 9x AMA Champion Ryan Villopoto recap the week in Pro Motocross and Supercross. A Division of NBCUniversal.