Hello all!!! I have been reading this forum now for hours trying to find the best answer for my problem. Here we go..... I bought my bike (2006 M50 with 7500mi.) two weeks ago, I got it of a older gentleman that took what seems to be very good care of it....not a scratch on it and runs like a top! Now that i have a couple weeks of riding into it (about 700 mi) i hear a knock of maybe a ticking noise from the engine. when its cold it is alot more noticeable...and it happens on a slight acceleration in any gear. after riding for maybe a half an hour it seems to drop by 50% but i can still notice it. any help/ideas would be greatly appreciated!!! thanks again!!!!