Tool Well I checked 3 different gas tubes that I have for spares,and none of them have a stepped down diameter on the reciever end.....then went to PRI and their gas tubes have a step down at the reciever....they sell the fat boy which has a smaller id and a regular tube...and both have a smaller diameter at the reciever end,so theres your prob....if it was me i would get another gas tube that doesn't have a step in it...maybe pri just uses a larger tube for od then steps it down?
:) Wash