So this is my brothers 2012 CRF450 he just got brand new from the dealer last February.... 94HRS oil changed every 6hrs, air filter changed every ride, always cleaned and well taken care of... And those of you loyal to OEM... It's NOT always perfect either. Even when put in by the factory... The piston seized to the cylinder.. YES it had coolant.. We run only engine ice. The piston seizing caused the connecting rod to snap off and go through the bottom part of the cylinder and also through the cases... This is just bad luck if you ask me... I don't know what else to think... Figured I'd post them for you guys to ponder with me for a bit.