Does this engine sound okay or may this need checking?http://www.youtube.com/watch?v=vbxkcHMDkO0 I am referring mainly to the slightly sewing machine sound / rock tumbler? Is this normal for a Buell. I noticed it on my XB12R and thought it was normal until I listened to a few videos on here and I know sometimes quieter sounds get drowned out on cheaper cams but I heard it on a few videos, not that many and it seems to be only on the higher quality videos.