What part is this?

Posted by Melderkin326 on Apr 10, 2013; 1:26pm
URL: http://vintage-and-classic-hondas.81.s1.nabble.com/What-part-is-this-tp4039193.html

I have a 1980 honda cb750k and I was taking the air box and noticed that there was a smaller black box under the battery box and there was a small tube going from the air box to this little black box and then the other end of the little black box there's a tube going somewhere underneath the bike. what is this box and what is? its function