Recently rebuilt carb with polaris parts to specs. It idles and accelerates well with out the breather box attached. When attached it still idles fine but will not accelerate through the mid-range rpms. Acts as if it is starving (Air/Fuel). Please help this thing is driving me nuts. Thanks in advance!

 

Take the snoot off the airbox and try it.THere is a wire inside it to hold it open if it is gone it will colapse causing your problem.

 

Thanks, it is missing. I will try that.