90 Degree Tire Stem Valves
Just got my new Metzelers mounted yesterday along with new metal valve stems; a 90 degree for the back and short straight for the front. Sweet! No more bending the rear tire stem to check the pressure or add air.
I didn't really didn't notice until I got home that the rear tire 90 degree valve was facing left (i.e., toward the side stand). Not a big deal for me, since I usually check the tire pressure and add air while on the center stand, but it would seem that facing the 90 degree valve stem to the right would allow for easy access when the bike is on the side stand.
I did a bit of Googling and lots of other folks, who have had a shop mount the valve, have had the same experience. Left mounting is required for some bikes to avoid contact with mechanics/body (i.e., left mounting on Honda Goldwing to avoid brake calibers on right), but I see no such reason on the VN750.
Is left mounting of a 90 degree valve stem some kind of tire industry standard, required by the makers of mounting/balancing equipment or some other logical reason?
Chris Glennon - Portland, OR