So after the winter my bike has been running like crap. Lots of decel popping, won't idle steady at all, hard to keep running, loss of power I tried a tank of Sea Foam. No help. So I bit the bullet and tore everything off and took a can of carb cleaner to it. I took it completely apart and shot cleaner into every hole I could find making sure it came out somewhere else in a stream or spray of some kind. Put it all back together and holy smokes I think it runs better than it did when I first put the carb on. Anyway, all that for this question.... There are two compartments on the carb. One on the bottom and one on the right hand side (maybe in a different spot, now I cant remember) that have cover plates that come off. When I took the plates off (very carefuly, not knowing what might fall/shoot out) I found some type of round rubber valve type deal in each one. They also had inlet and outlet holes for fuel (or maybe air). What are these mysterious round rubber valves and what is the purpose for these two chambers? I don't like not knowing what stuff is. Especially when it looks as important as these chambers/valves look. Anyway if anyone could shed some light on this I would really appreciate it.