Murphs' has options for your valve stems. It is generally a good idea to replace your stems every couple of tire changes, and some people recommend doing it with EACH tire change.
90-Degree OEM rear valve stems, 86-93
This is OEM Part Number 16126-1191. It was used from 1986 to 1993 on the rear of the Concours.
This is OEM part number 16126-1140, used on 93 model front wheels, and all wheels from 94 up.
45-Degree valve stem for all years!
Now a valve stem to make getting air into the rear wheel of your late
model Concours much easier! Made in the USA.
Note that the price shown above is for one of the straight stems. The prices for the 45 and 90 degree stems are slightly higher, as can be seen with the add-on amounts shown in the drop down list below. Save $4 by selecting the pair of 45 degree stem option, rather than purchasing them separately!