Description:

This engine is easy to handle for both entry-level and sporty users, and offers excellent cost performance. Based on the O.S. SPEED series engines, it offers a well-balanced combination of smooth running and power, and can be used in both on- and off-road racing. 
The outer head has been lightweight drilled to reduce weight gain, and the corporate color blue anodized aluminum has been newly laser machined. The combustion chamber shape of the inner head has been redesigned to improve combustion efficiency and pickup. 
The crankcase was newly designed to improve idling performance.