All things youth moto…

The cylinder is the heart of any two-stroke engine. Instead of poppet valves, the two stroke uses carefully crafted passageways to direct exhaust out of the engine and fresh intake mixture in. The shape and size of these passageways (or ports) is critical, and so for 2011, Cobra has decided to leave nothing to chance. Instead of relying on the relatively inaccurate process of casting to determine exhaust port timing, we are setting the timing using a very precise machine that we have developed in-house – no other company in the world has anything like it. The result is more power throughout the RPM range and more consistency from bike-to-bike.

In addition, the Cobra R&D crew also created a self-centering head insert that will ensure that the combustion chamber is always aligned with the piston crown. This not only makes assembly easier, it also allowed us to tighten up squish and increase compression ratio for improved bottom-end torque.