I have recently experienced my first flat due to a torn valve stem and learned not to tighten down the valve stem nut (YZ). However, when I run with it loose I can see that some dirt / sand is making its way into my rim. I have heard that Honda's come stock with a rubber washer or something, but I am not sure what this is. Can anyone help me with my following questions: 1) What is the Honda / other product that I should buy to correct this issue? Pic? 2) Is it a rubber valve stem that I need or simple a rubber washer of some sorts that goes over the top of the valve without removing the tube? Appreciate the help!