EXHAUSTING DESIGN

Few elements have as large an impact on a motorcycle’s design as the exhaust system. From header to exit, the gently curving shapes help define some of our favorite bikes, but the shapes are far from purely aesthetic.

Exhaust gas contains useful energy in the form of velocity, and smooth shapes minimize the loss of that energy. A piston’s full-throttle power stroke begins with combustion gas at roughly 1,000 psi a few degrees after