Exhaust valve mechanism finished! A latching spring loaded mechanism, that just clicks into place. Very satisfying feel / click! Happy this is done finally.

The purpose of the exhaust valves is for noise reduction when needed. For example an early morning taking into consideration neighbors, pit lane sound check or a police stop…. Not for constant use when riding obviously, and the valves don’t close completely!

Everything is adjustable if it turns out they close to much or little. Works like charm when done correctly, I have used this on multiple bikes, just like Ducati uses it to homologate their bikes.

Mechanism is all pretty simple to be honest, but to make it work properly took some trial and error using 3D printed test pieces. The lever clicks into place using spring loaded ball bearing hex screws, and the lever rotates using miniature bearings. The motion is transferred to the valve mechanism using ball joints and adjustment rods.