The exhaust valves I was planning to use were just to heavy. No way I can get those to a acceptable weight. So its time to build our own custom ones since nothing is available in the right size of 50mm.

For Project Venom Racing we have multiple 60mm BMW exhaust valves available. Thin walled and really lightweight. Also has a simpler axle/valve design then the other model. I donated 2 of those valves to the Desmoto project and decided to cut them up to use as a base. Nothing special, just an axle with a cylinder, but it already has hard stops milled in.

This is a situation where CAD is ideal to measure and test things out. Designed an oval valve with just the right clearances that will be laser cut to size.

Why exhaust valves? To allow me to somewhat reduce the sound of the exhaust when I get pulled over by the police… haha