Conventional 2-Stroke Engine 20% higher fuel loss and greater emissions are produced by conventional 2-stroke technology. SAS 2-Stroke Engine Air flow through the transfer port into the cylinder pushes the burned gases into and through the exhaust outlet. This process recovers 75% of the unburned fuel normally lost by conventional 2-stroke exhaust - and utilizes that fuel for power - for greater efficiency and cleaner exhaust Greater Efficiency + Cleaner Operation = Advantageous Performance Global carbon footprint reduced due to lower emissions Reduction of hydrocarbons (HC) and nitrogen oxydes (Nox) to meet global standards. View tools featuring SAS