Anyone have any experience with these? I bought one for my 04 636 and mounted it up tonight. I bought it off a guy who got run off the road and his bike was totaled. It is mounted tight and all the bolts are snugged. I have no idea how to adjust it and the tube that the smaller one goes inside I can rock it nose to tail. It appears to have a bearing that lets it do it but I thought it would be a tight fit to keep it from moving around, I guess I could be wrong. Any info would help. Ill take pics tomorrow and maybe a vid to show what I mean