DT 175TOP FEATURES A 2 stroke, single cylinder engine has the big advantage of strong, torque y performance. The air cooled type used on the DT models also has the advantage of reduced weight and easier servicing, because it doesn't require a liquid cooling component. A 2 stroke also doesn't require regular oil changes. The DT engines are fitted with the exclusive Yamaha Energy Induction System (YEIS). This unique intake system features a chamber between