Motorcycle valve has a bulbous end which goes on the inside of the rim. This prevents the valve from going through the hole in the rim. A pump is screwed onto the top, allowing air into the tire.
Pressed my front tire’s tire valve in a certain direction I did, and air leaked out. This cannot be good. After checking the age of the tire, I knew that my tire valve needed replacement. In this case my DIY efforts proved insufficient, but I learned something. I had a local bike shop replace my tire and valve.