Yamaha - Insert, cartridge - 6R3-44322-42-00Yamaha Cartridge Insert Cooling System Component 6R3 44322 42 00 Overview This is one of those parts that keeps water moving where it needs to go, even though you never really see it working. Ive come across cooling issues that ended up being tied back to worn or clogged inserts like this. When its in good shape, water flows clean and the engine stays at the right temp without any surprises. Its a small piece, but it plays a big role in keeping things