N-MAX 155TOP FEATURES Powerful Blue Core Engine The NMAX 155s engine has been developed by using Yamahas advanced Blue Core technology. This innovative design approach focuses on increasing combustion and cooling efficiency while at the same time reducing power losses, to give you quicker acceleration with a higher top speed and reduced fuel consumption. Sporty and Lightweight Chassis NMAX 155 is equipped with an immensely strong and lightweight tubular frame