Re: what did you do to your motor bike today?
The rubber coupling should be fine. It does not hold the velocity stack on the carb, only tunnels air into the v-stack, and holds the filter screen. The point is to move the screen farther away from the v-stack, and hold a bigger circle of cloth to breathe through. Plus it protects the carb some from impacts if my leg hits the boot getting on/off the bike.
1" roller Dax Friction Drive and Tanaka 3300 with mods.