90- Deg. valve Stem
I had these on my 03 Gt and during my Coast to Coast trip the front seperated from the wheel. I didn't wreck ( pants were filled) but in the process of putting air in tire the bike fell over like a Redwood.
My opinion is that when I get my tires replaced the tech puts too much pressure on this flimsy stem and it causes the rubber seat to become worn.
A true gentleman Ralph Oppy of Macon , Ga. came out with trailer and we went to a Honda shop to fix problem.
Upon arriving in Atlanta I removed rear wheel and Blue Moon BMW replaced that valve stem with a straight one also.
So word of caution guy's and Gal's if you have the 90 degree stems check them very often to see if they are indeed pulling through your wheel.
Better yet remove tehm and go natural staright.