Dude, I think your audio is just fine. It's definitely a lot better than a lot of other motovloggers I believe. What program do you use to put your videos together? If anything, I think you could benefit from increasing the mid range audio level to make your voice a little more pronounced. Just try it out if you've got the software...but otherwise, I can hear you just fine. I always tweak my audio in post-processing to make my voice a tiny bit more clear.