I was wondering if anyone else was experiencing the same problem I am with my built in XM radio. I have a 2009 GL1800 that I purchased new in March of this year. The problem that I am experiencing is that my XM loses its signal quite often while riding. My riding buddy has an aftermarket XM radio on his bike and when we ride together I lose my signal constantly while his maintains a perfect signal. I was just wondering if it was maybe a design flaw with antenna placement by Honda? Im not apposed to putting an aftermarket XM antenna on my bike if its possible. If anybody else is experiencing this please respond especially if you have a solution. Thanks in advance for your information.