That setup suggests much less mass inside the cylinder head and minimized weight for the overall outboard. At the same time, four valves for every cylinder indicates excellent motor combustion, which contributes to horsepower, torque and fuel efficiency. Fast Acceleration A TCI microcomputer ignition adjusts timing to maintain optimal engine https://yamaha130hpoutboardmotors91233.blogolize.com/everything-about-yamaha-2-stroke-v-max-74595872