What is this carb part?

[salty_monk]

Road debris, rain, water when you wash it can get into the carbs easily ...Down nothing can run uphill.

another good reason for more riding & less washing

[cowboyup3371]

another good reason for more riding & less washing

Washing the bike is the devils work I tell you

[abaton6]

I tried one last thing. I put the airbox cover on, and connected the hose from the top of the airbox to the valve cover. I started! It's not running great, but it's progress.