Have the factory radio. When the bike is standing still, the radio works perfectly. Once the bike is in motion, it starts to crackle and fade in and out. Almost like bad antenna reception. I checked the antenna and the fitting in the tour pack. What do you think?

 

What year is the bike?
Any issues with other audio sources (CD, AUX) ?

Probably easier to give us a call and we'll see what we can figure out.