I am in the process of buying a 05 parker 2120 w/ a 150 4 st. While being checked out on the computer, the motor threw a code indicating that the nylon crankshaft counter balance gear needs replacing.According to the tech that you will hear a squeaking at idle coming from the power head due to this gear.My understanding is that a failure of this gear may cause the motor to sieze.The tech stated that yamaha is aware of the problem and will cover repair and or replacment,if under warrenty.If outside the warrenty period , its on you. This is what I do not understand,if yamaha knows of the problem why is there not a recall and resolving the issue whether the motor is with in the warrenty period or not.I know others have had problems with this nylon gear on classic parker.com , but my post has had no replys.That is why I am posting here , did I get some misinformation ? PLEASE HELP.