As I was in the process of mounting a new tire on the sidecar wheel of our Bonneville outfit, I was reminded that there are some real nice Alum. valve stem caps on the after- market......(all LSR equipment is required to use metal caps) However, I have had problems removing those caps due to water and salt getting between the stem and cap. On one of our bikes I had to use pliers and a box-wrench to get the cap off. I have been putting some lube inside the caps for the past 10 years......problem solved..........
That salt gets into everything.....