don't have left pull problem and really have not heard of it....I do have 3 cracked pistons and they have this problem....2013 with 53500 miles was sucking oil into the air box then burning it(smoking) at higher than legal speeds.....Dealer pullled it apart for 3 bad pistons big problem is they have no replacements any where in the states and back ordered from Germany.....so my bike sets torn apart with no repair parts no loaner to ride....Trust me this is not a one off problem there are many out there.....be prepared BMW as usual has turned there back on this problem just like they did with driveshaft problems a few years ago.....keep an eye on your oil drain off tube from the air box.....