Hello , I Recently purchased my first PWC a 07 F12x brand new with zero hours on it. Last weekend i took it out and broke it in as per the manuel. I noticed right away that their was a slight vibration coming from the left rear side at certian Rpm(3-4) and, when backing off the throttle and slowing down it is quite noticeable. Is this a normal characteristic for the 12-x? It seems to run smoothly and perform properly but this vibration does not seem right! I have checked the intake grate and impeller and they are free of debris. The machine sat in the honda wharehouse for the past three years so is there anything should be checked or greased that the manuel does not specify. Any thoughts? Thanks!