at the rear of the tank there are two hoses. one a breather and the other an over flow. does anyone know which is which between the skinny and fatter in diameter?

also, should both of them have unrestricted air flow through them. when pressure is put through both hoses the fat one is unrestricted air passes through freely. The skinny one seems somewhat blocked as if there is a filter on the other end.

 

The fat hose is the overflow, ittakes spilled gas fromunder your gas lid and makes it exit the frame, and mine flows very freely. The small one is a breather it is at the top of the inside of your tank, and mine does not flow as free, but my bike also has a hard time getting back to idle normally. Hope this helps, Nick.

 

will it hurt anything if the fat hose is plugged?

 

I bought a peice of hose from the parts store and ran it down and exited the frame. But I dont think it would hurt if you plugged it but i dont understand why you would when its so easy to run a new hose. Hope that helps.

 

because my overflow line has a hole in it in the tank and if I fill it up over that it runs out of the overflow.