Slant six space

I'll try to get the air bubble out but I thought that the carb would such the air out. The filter is at a 45 degree angle. Do you think that it's sucking air maybe? Idle is fine but when I accelerate it sounds like I have a fancy cam in it.
It's just a trapped air bubble. Won't hurt anything, but if it bothers you, mount the filter vertically and the bubble will go away.